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Conserved domains on  [gi|221476505|ref|NP_001097185|]
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Rho-type guanine nucleotide exchange factor, isoform D [Drosophila melanogaster]

Protein Classification

RhoGEF family protein; TIAM family RhoGEF and PH domain-containing protein( domain architecture ID 10878720)

RhoGEF (rho guanine nucleotide exchange factor) family protein similar to RhoGEF and PH (pleckstrin homology) domain regions of Mus musculus guanine nucleotide exchange factor DBS| TIAM (T-lymphoma invasion and metastasis-inducing protein) family RhoGEF (rho guanine nucleotide exchange factor) and PH (pleckstrin homology) domain-containing protein similar to RhoGEF and PH domain regions of Homo sapiens Rho guanine nucleotide exchange factor TIAM1/TIAM2 that modulates the activity of RHO-like proteins and connects extracellular signals to cytoskeletal activities

Graphical summary

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List of domain hits

Name Accession Description Interval E-value
PH_Cool_Pix cd01225
Cloned out of library/PAK-interactive exchange factor pleckstrin homology (PH) domain; There ...
281-376 8.02e-47

Cloned out of library/PAK-interactive exchange factor pleckstrin homology (PH) domain; There are two forms of Pix proteins: alpha Pix (also called Rho guanine nucleotide exchange factor (GEF) 6/90Cool-2) and beta Pix (GEF7/p85Cool-1). betaPix contains an N-terminal SH3 domain, a RhoGEF/DH domain, a PH domain, a GIT1 binding domain (GBD), and a C-terminal coiled-coil (CC) domain. alphaPix differs in that it contains a calponin homology (CH) domain, which interacts with beta-parvin, N-terminal to the SH3 domain. alphaPix is an exchange factor for Rac1 and Cdc42 and mediates Pak activation on cell adhesion to fibronectin. Mutations in alphaPix can cause X-linked mental retardation. alphaPix also interacts with Huntington's disease protein (htt), and enhances the aggregation of mutant htt (muthtt) by facilitating SDS-soluble muthtt-muthtt interactions. The DH-PH domain of a Pix was required for its binding to htt. In the majority of Rho GEF proteins, the DH-PH domain is responsible for the exchange activity. PH domains have diverse functions, but in general are involved in targeting proteins to the appropriate cellular location or in the interaction with a binding partner. They share little sequence conservation, but all have a common fold, which is electrostatically polarized. Less than 10% of PH domains bind phosphoinositide phosphates (PIPs) with high affinity and specificity. PH domains are distinguished from other PIP-binding domains by their specific high-affinity binding to PIPs with two vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3 which results in targeting some PH domain proteins to the plasma membrane. A few display strong specificity in lipid binding. Any specificity is usually determined by loop regions or insertions in the N-terminus of the domain, which are not conserved across all PH domains. PH domains are found in cellular signaling proteins such as serine/threonine kinase, tyrosine kinases, regulators of G-proteins, endocytotic GTPases, adaptors, as well as cytoskeletal associated molecules and in lipid associated enzymes.


:

Pssm-ID: 269932  Cd Length: 100  Bit Score: 162.10  E-value: 8.02e-47
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 221476505 281 IIHMGSVAVGA----DHRDRYFVLFPQTLLFLSVSQRMSAFIYEGKLPLTGIIVNRLEDTDALKNAFEISSPLIDRIVAV 356
Cdd:cd01225    1 VIHMSQVAVQNtgcqEKKERYFLLFPHVLLMLSASPRMSGFIYEGKLPLTGISVNRLEDTEGIKNAFEISGPLIERIVVI 80
                         90       100
                 ....*....|....*....|
gi 221476505 357 CQGPNEANKWVELLNANNPS 376
Cdd:cd01225   81 CNSQQDQQEWLEHLQQQTKA 100
RhoGEF cd00160
Guanine nucleotide exchange factor for Rho/Rac/Cdc42-like GTPases; Also called Dbl-homologous ...
79-249 3.32e-44

Guanine nucleotide exchange factor for Rho/Rac/Cdc42-like GTPases; Also called Dbl-homologous (DH) domain. It appears that PH domains invariably occur C-terminal to RhoGEF/DH domains.


:

Pssm-ID: 238091 [Multi-domain]  Cd Length: 181  Bit Score: 157.84  E-value: 3.32e-44
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 221476505  79 RSVVLKDLLDSERAHVAELQGLLENFLEPMQQTQI-LSQDEYAQLMCNFVEIVRTHEDLLIQIEEC-------NDRVGKL 150
Cdd:cd00160    1 RQEVIKELLQTERNYVRDLKLLVEVFLKPLDKELLpLSPEEVELLFGNIEEIYEFHRIFLKSLEERveewdksGPRIGDV 80
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 221476505 151 FLTSAPlMKKVHQAYCAAHPKAIVILDKYK---DELEKYMERQGAAtPGLLVLTTGLSKPFRRLDKYSAMLQELERHMES 227
Cdd:cd00160   81 FLKLAP-FFKIYSEYCSNHPDALELLKKLKkfnKFFQEFLEKAESE-CGRLKLESLLLKPVQRLTKYPLLLKELLKHTPD 158
                        170       180
                 ....*....|....*....|..
gi 221476505 228 SHPDRGDTQRSVAVYKDIAATC 249
Cdd:cd00160  159 GHEDREDLKKALEAIKEVASQV 180
SH3_PIX cd11877
Src Homology 3 domain of Pak Interactive eXchange factors; PIX proteins are Rho guanine ...
6-58 1.29e-31

Src Homology 3 domain of Pak Interactive eXchange factors; PIX proteins are Rho guanine nucleotide exchange factors (GEFs), which activate small GTPases by exchanging bound GDP for free GTP. They act as GEFs for both Cdc42 and Rac 1, and have been implicated in cell motility, adhesion, neurite outgrowth, and cell polarity. Vertebrates contain two proteins from the PIX subfamily, alpha-PIX and beta-PIX. Alpha-PIX, also called ARHGEF6, is localized in dendritic spines where it regulates spine morphogenesis. Mutations in the ARHGEF6 gene cause X-linked intellectual disability in humans. Beta-PIX play roles in regulating neuroendocrine exocytosis, focal adhesion maturation, cell migration, synaptic vesicle localization, and insulin secretion. PIX proteins contain an N-terminal SH3 domain followed by RhoGEF (also called Dbl-homologous or DH) and Pleckstrin Homology (PH) domains, and a C-terminal leucine-zipper domain for dimerization. The SH3 domain of PIX binds to an atypical PxxxPR motif in p21-activated kinases (PAKs) with high affinity. The binding of PAKs to PIX facilitate the localization of PAKs to focal complexes and also localizes PAKs to PIX targets Cdc43 and Rac, leading to the activation of PAKs. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


:

Pssm-ID: 212810 [Multi-domain]  Cd Length: 53  Bit Score: 117.42  E-value: 1.29e-31
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|...
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd11877    1 LVRAKFNFEGTNEDELSFDKGDIITVTQVVEGGWWEGTLNGKTGWFPSNYVKE 53
RhoGEF67_u2 super family cl24988
Unstructured region two on RhoGEF 6 and 7; RhoGEF67_u2 is a region of natively unstructured ...
543-612 1.22e-06

Unstructured region two on RhoGEF 6 and 7; RhoGEF67_u2 is a region of natively unstructured residues on Rho guanine nucleotide exchange factor 6 and 7 proteins. The function is not known. It lies after the PH domain and before the C-terminal coiled-coil.


The actual alignment was detected with superfamily member pfam16614:

Pssm-ID: 465200  Cd Length: 99  Bit Score: 47.78  E-value: 1.22e-06
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 221476505  543 WTISCLRPTPPLRPS-----------LLNATSGSGSGSGGSGGGGSSSSNALASYCSGRKNQPTYEEDALVLRVFEAYCA 611
Cdd:pfam16614  14 WSLSCLRPAPPLRPSaalgykermsyILKDTSKSPKTMKKFLPKRKTERKPSEEEFAIRKSTAALEEDAQILKVIEAYCT 93

                  .
gi 221476505  612 A 612
Cdd:pfam16614  94 S 94
 
Name Accession Description Interval E-value
PH_Cool_Pix cd01225
Cloned out of library/PAK-interactive exchange factor pleckstrin homology (PH) domain; There ...
281-376 8.02e-47

Cloned out of library/PAK-interactive exchange factor pleckstrin homology (PH) domain; There are two forms of Pix proteins: alpha Pix (also called Rho guanine nucleotide exchange factor (GEF) 6/90Cool-2) and beta Pix (GEF7/p85Cool-1). betaPix contains an N-terminal SH3 domain, a RhoGEF/DH domain, a PH domain, a GIT1 binding domain (GBD), and a C-terminal coiled-coil (CC) domain. alphaPix differs in that it contains a calponin homology (CH) domain, which interacts with beta-parvin, N-terminal to the SH3 domain. alphaPix is an exchange factor for Rac1 and Cdc42 and mediates Pak activation on cell adhesion to fibronectin. Mutations in alphaPix can cause X-linked mental retardation. alphaPix also interacts with Huntington's disease protein (htt), and enhances the aggregation of mutant htt (muthtt) by facilitating SDS-soluble muthtt-muthtt interactions. The DH-PH domain of a Pix was required for its binding to htt. In the majority of Rho GEF proteins, the DH-PH domain is responsible for the exchange activity. PH domains have diverse functions, but in general are involved in targeting proteins to the appropriate cellular location or in the interaction with a binding partner. They share little sequence conservation, but all have a common fold, which is electrostatically polarized. Less than 10% of PH domains bind phosphoinositide phosphates (PIPs) with high affinity and specificity. PH domains are distinguished from other PIP-binding domains by their specific high-affinity binding to PIPs with two vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3 which results in targeting some PH domain proteins to the plasma membrane. A few display strong specificity in lipid binding. Any specificity is usually determined by loop regions or insertions in the N-terminus of the domain, which are not conserved across all PH domains. PH domains are found in cellular signaling proteins such as serine/threonine kinase, tyrosine kinases, regulators of G-proteins, endocytotic GTPases, adaptors, as well as cytoskeletal associated molecules and in lipid associated enzymes.


Pssm-ID: 269932  Cd Length: 100  Bit Score: 162.10  E-value: 8.02e-47
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 221476505 281 IIHMGSVAVGA----DHRDRYFVLFPQTLLFLSVSQRMSAFIYEGKLPLTGIIVNRLEDTDALKNAFEISSPLIDRIVAV 356
Cdd:cd01225    1 VIHMSQVAVQNtgcqEKKERYFLLFPHVLLMLSASPRMSGFIYEGKLPLTGISVNRLEDTEGIKNAFEISGPLIERIVVI 80
                         90       100
                 ....*....|....*....|
gi 221476505 357 CQGPNEANKWVELLNANNPS 376
Cdd:cd01225   81 CNSQQDQQEWLEHLQQQTKA 100
RhoGEF cd00160
Guanine nucleotide exchange factor for Rho/Rac/Cdc42-like GTPases; Also called Dbl-homologous ...
79-249 3.32e-44

Guanine nucleotide exchange factor for Rho/Rac/Cdc42-like GTPases; Also called Dbl-homologous (DH) domain. It appears that PH domains invariably occur C-terminal to RhoGEF/DH domains.


Pssm-ID: 238091 [Multi-domain]  Cd Length: 181  Bit Score: 157.84  E-value: 3.32e-44
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 221476505  79 RSVVLKDLLDSERAHVAELQGLLENFLEPMQQTQI-LSQDEYAQLMCNFVEIVRTHEDLLIQIEEC-------NDRVGKL 150
Cdd:cd00160    1 RQEVIKELLQTERNYVRDLKLLVEVFLKPLDKELLpLSPEEVELLFGNIEEIYEFHRIFLKSLEERveewdksGPRIGDV 80
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 221476505 151 FLTSAPlMKKVHQAYCAAHPKAIVILDKYK---DELEKYMERQGAAtPGLLVLTTGLSKPFRRLDKYSAMLQELERHMES 227
Cdd:cd00160   81 FLKLAP-FFKIYSEYCSNHPDALELLKKLKkfnKFFQEFLEKAESE-CGRLKLESLLLKPVQRLTKYPLLLKELLKHTPD 158
                        170       180
                 ....*....|....*....|..
gi 221476505 228 SHPDRGDTQRSVAVYKDIAATC 249
Cdd:cd00160  159 GHEDREDLKKALEAIKEVASQV 180
RhoGEF smart00325
Guanine nucleotide exchange factor for Rho/Rac/Cdc42-like GTPases; Guanine nucleotide exchange ...
82-249 1.03e-41

Guanine nucleotide exchange factor for Rho/Rac/Cdc42-like GTPases; Guanine nucleotide exchange factor for Rho/Rac/Cdc42-like GTPases Also called Dbl-homologous (DH) domain. It appears that PH domains invariably occur C-terminal to RhoGEF/DH domains. Improved coverage.


Pssm-ID: 214619 [Multi-domain]  Cd Length: 180  Bit Score: 150.91  E-value: 1.03e-41
                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 221476505    82 VLKDLLDSERAHVAELQGLLENFLEPMQQT-QILSQDEYAQLMCNFVEIVRTHEDLLIQIEEC-------NDRVGKLFLT 153
Cdd:smart00325   1 VLKELLQTERNYVRDLKLLVEVFLKPLKKElKLLSPNELETLFGNIEEIYEFHRDFLDELEERieewddsVERIGDVFLK 80
                           90       100       110       120       130       140       150       160
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 221476505   154 SAPlMKKVHQAYCAAHPKAIVILDK--YKDELEKYMERQGAATP-GLLVLTTGLSKPFRRLDKYSAMLQELERHMESSHP 230
Cdd:smart00325  81 LEE-FFKIYSEYCSNHPDALELLKKlkKNPRFQKFLKEIESSPQcRRLTLESLLLKPVQRLTKYPLLLKELLKHTPEDHE 159
                          170
                   ....*....|....*....
gi 221476505   231 DRGDTQRSVAVYKDIAATC 249
Cdd:smart00325 160 DREDLKKALKAIKELANQV 178
SH3_PIX cd11877
Src Homology 3 domain of Pak Interactive eXchange factors; PIX proteins are Rho guanine ...
6-58 1.29e-31

Src Homology 3 domain of Pak Interactive eXchange factors; PIX proteins are Rho guanine nucleotide exchange factors (GEFs), which activate small GTPases by exchanging bound GDP for free GTP. They act as GEFs for both Cdc42 and Rac 1, and have been implicated in cell motility, adhesion, neurite outgrowth, and cell polarity. Vertebrates contain two proteins from the PIX subfamily, alpha-PIX and beta-PIX. Alpha-PIX, also called ARHGEF6, is localized in dendritic spines where it regulates spine morphogenesis. Mutations in the ARHGEF6 gene cause X-linked intellectual disability in humans. Beta-PIX play roles in regulating neuroendocrine exocytosis, focal adhesion maturation, cell migration, synaptic vesicle localization, and insulin secretion. PIX proteins contain an N-terminal SH3 domain followed by RhoGEF (also called Dbl-homologous or DH) and Pleckstrin Homology (PH) domains, and a C-terminal leucine-zipper domain for dimerization. The SH3 domain of PIX binds to an atypical PxxxPR motif in p21-activated kinases (PAKs) with high affinity. The binding of PAKs to PIX facilitate the localization of PAKs to focal complexes and also localizes PAKs to PIX targets Cdc43 and Rac, leading to the activation of PAKs. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212810 [Multi-domain]  Cd Length: 53  Bit Score: 117.42  E-value: 1.29e-31
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|...
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd11877    1 LVRAKFNFEGTNEDELSFDKGDIITVTQVVEGGWWEGTLNGKTGWFPSNYVKE 53
RhoGEF pfam00621
RhoGEF domain; Guanine nucleotide exchange factor for Rho/Rac/Cdc42-like GTPases Also called ...
82-249 3.31e-30

RhoGEF domain; Guanine nucleotide exchange factor for Rho/Rac/Cdc42-like GTPases Also called Dbl-homologous (DH) domain. It appears that pfam00169 domains invariably occur C-terminal to RhoGEF/DH domains.


Pssm-ID: 459876 [Multi-domain]  Cd Length: 176  Bit Score: 117.79  E-value: 3.31e-30
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 221476505   82 VLKDLLDSERAHVAELQGLLENFLEPMQQTQILSQDEYAQLMCNFVEIVRTHEDLLIQI----EECNDRVGKLFLTSAPL 157
Cdd:pfam00621   1 VIKELLQTERSYVRDLEILVEVFLPPNSKPLSESEEEIKTIFSNIEEIYELHRQLLLEEllkeWISIQRIGDIFLKFAPG 80
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 221476505  158 MKkVHQAYCAAHPKAIVILDKYKDELEKYM----ERQGAATPGLLVLTTGLSKPFRRLDKYSAMLQELERHMESSHPDRG 233
Cdd:pfam00621  81 FK-VYSTYCSNYPKALKLLKKLLKKNPKFRafleELEANPECRGLDLNSFLIKPVQRIPRYPLLLKELLKHTPPDHPDYE 159
                         170
                  ....*....|....*.
gi 221476505  234 DTQRSVAVYKDIAATC 249
Cdd:pfam00621 160 DLKKALEAIKEVAKQI 175
SH3 smart00326
Src homology 3 domains; Src homology 3 (SH3) domains bind to target proteins through sequences ...
3-56 4.40e-20

Src homology 3 domains; Src homology 3 (SH3) domains bind to target proteins through sequences containing proline and hydrophobic amino acids. Pro-containing polypeptides may bind to SH3 domains in 2 different binding orientations.


Pssm-ID: 214620 [Multi-domain]  Cd Length: 56  Bit Score: 84.51  E-value: 4.40e-20
                           10        20        30        40        50
                   ....*....|....*....|....*....|....*....|....*....|....*
gi 221476505     3 QPLVVQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLND-KTGWFPSNYV 56
Cdd:smart00326   1 EGPQVRALYDYTAQDPDELSFKKGDIITVLEKSDDGWWKGRLGRgKEGLFPSNYV 55
SH3_9 pfam14604
Variant SH3 domain;
9-56 4.93e-13

Variant SH3 domain;


Pssm-ID: 434066 [Multi-domain]  Cd Length: 49  Bit Score: 64.17  E-value: 4.93e-13
                          10        20        30        40
                  ....*....|....*....|....*....|....*....|....*...
gi 221476505    9 AEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:pfam14604   1 ALYPYEPKDDDELSLQRGDVITVIEESEDGWWEGINTGRTGLVPANYV 48
PH smart00233
Pleckstrin homology domain; Domain commonly found in eukaryotic signalling proteins. The ...
294-372 5.93e-10

Pleckstrin homology domain; Domain commonly found in eukaryotic signalling proteins. The domain family possesses multiple functions including the abilities to bind inositol phosphates, and various proteins. PH domains have been found to possess inserted domains (such as in PLC gamma, syntrophins) and to be inserted within other domains. Mutations in Brutons tyrosine kinase (Btk) within its PH domain cause X-linked agammaglobulinaemia (XLA) in patients. Point mutations cluster into the positively charged end of the molecule around the predicted binding site for phosphatidylinositol lipids.


Pssm-ID: 214574 [Multi-domain]  Cd Length: 102  Bit Score: 57.17  E-value: 5.93e-10
                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 221476505   294 RDRYFVLFPQTLLFLSVSQRMSAFIYEGKLPLTGIIVNRLEDTDAL--KNAFEISSPLIDRIVAVCQGPNEANKWVELLN 371
Cdd:smart00233  19 KKRYFVLFNSTLLYYKSKKDKKSYKPKGSIDLSGCTVREAPDPDSSkkPHCFEIKTSDRKTLLLQAESEEEREKWVEALR 98

                   .
gi 221476505   372 A 372
Cdd:smart00233  99 K 99
RhoGEF67_u2 pfam16614
Unstructured region two on RhoGEF 6 and 7; RhoGEF67_u2 is a region of natively unstructured ...
543-612 1.22e-06

Unstructured region two on RhoGEF 6 and 7; RhoGEF67_u2 is a region of natively unstructured residues on Rho guanine nucleotide exchange factor 6 and 7 proteins. The function is not known. It lies after the PH domain and before the C-terminal coiled-coil.


Pssm-ID: 465200  Cd Length: 99  Bit Score: 47.78  E-value: 1.22e-06
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 221476505  543 WTISCLRPTPPLRPS-----------LLNATSGSGSGSGGSGGGGSSSSNALASYCSGRKNQPTYEEDALVLRVFEAYCA 611
Cdd:pfam16614  14 WSLSCLRPAPPLRPSaalgykermsyILKDTSKSPKTMKKFLPKRKTERKPSEEEFAIRKSTAALEEDAQILKVIEAYCT 93

                  .
gi 221476505  612 A 612
Cdd:pfam16614  94 S 94
PH pfam00169
PH domain; PH stands for pleckstrin homology.
294-371 7.04e-05

PH domain; PH stands for pleckstrin homology.


Pssm-ID: 459697 [Multi-domain]  Cd Length: 105  Bit Score: 42.93  E-value: 7.04e-05
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 221476505  294 RDRYFVLFPQTLLFLSVSQRMSAFIYEGKLPLTGIIVNRLEDTDAL--KNAFEISSPLID---RIVAVCQGPNEANKWVE 368
Cdd:pfam00169  19 KKRYFVLFDGSLLYYKDDKSGKSKEPKGSISLSGCEVVEVVASDSPkrKFCFELRTGERTgkrTYLLQAESEEERKDWIK 98

                  ...
gi 221476505  369 LLN 371
Cdd:pfam00169  99 AIQ 101
 
Name Accession Description Interval E-value
PH_Cool_Pix cd01225
Cloned out of library/PAK-interactive exchange factor pleckstrin homology (PH) domain; There ...
281-376 8.02e-47

Cloned out of library/PAK-interactive exchange factor pleckstrin homology (PH) domain; There are two forms of Pix proteins: alpha Pix (also called Rho guanine nucleotide exchange factor (GEF) 6/90Cool-2) and beta Pix (GEF7/p85Cool-1). betaPix contains an N-terminal SH3 domain, a RhoGEF/DH domain, a PH domain, a GIT1 binding domain (GBD), and a C-terminal coiled-coil (CC) domain. alphaPix differs in that it contains a calponin homology (CH) domain, which interacts with beta-parvin, N-terminal to the SH3 domain. alphaPix is an exchange factor for Rac1 and Cdc42 and mediates Pak activation on cell adhesion to fibronectin. Mutations in alphaPix can cause X-linked mental retardation. alphaPix also interacts with Huntington's disease protein (htt), and enhances the aggregation of mutant htt (muthtt) by facilitating SDS-soluble muthtt-muthtt interactions. The DH-PH domain of a Pix was required for its binding to htt. In the majority of Rho GEF proteins, the DH-PH domain is responsible for the exchange activity. PH domains have diverse functions, but in general are involved in targeting proteins to the appropriate cellular location or in the interaction with a binding partner. They share little sequence conservation, but all have a common fold, which is electrostatically polarized. Less than 10% of PH domains bind phosphoinositide phosphates (PIPs) with high affinity and specificity. PH domains are distinguished from other PIP-binding domains by their specific high-affinity binding to PIPs with two vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3 which results in targeting some PH domain proteins to the plasma membrane. A few display strong specificity in lipid binding. Any specificity is usually determined by loop regions or insertions in the N-terminus of the domain, which are not conserved across all PH domains. PH domains are found in cellular signaling proteins such as serine/threonine kinase, tyrosine kinases, regulators of G-proteins, endocytotic GTPases, adaptors, as well as cytoskeletal associated molecules and in lipid associated enzymes.


Pssm-ID: 269932  Cd Length: 100  Bit Score: 162.10  E-value: 8.02e-47
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 221476505 281 IIHMGSVAVGA----DHRDRYFVLFPQTLLFLSVSQRMSAFIYEGKLPLTGIIVNRLEDTDALKNAFEISSPLIDRIVAV 356
Cdd:cd01225    1 VIHMSQVAVQNtgcqEKKERYFLLFPHVLLMLSASPRMSGFIYEGKLPLTGISVNRLEDTEGIKNAFEISGPLIERIVVI 80
                         90       100
                 ....*....|....*....|
gi 221476505 357 CQGPNEANKWVELLNANNPS 376
Cdd:cd01225   81 CNSQQDQQEWLEHLQQQTKA 100
RhoGEF cd00160
Guanine nucleotide exchange factor for Rho/Rac/Cdc42-like GTPases; Also called Dbl-homologous ...
79-249 3.32e-44

Guanine nucleotide exchange factor for Rho/Rac/Cdc42-like GTPases; Also called Dbl-homologous (DH) domain. It appears that PH domains invariably occur C-terminal to RhoGEF/DH domains.


Pssm-ID: 238091 [Multi-domain]  Cd Length: 181  Bit Score: 157.84  E-value: 3.32e-44
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 221476505  79 RSVVLKDLLDSERAHVAELQGLLENFLEPMQQTQI-LSQDEYAQLMCNFVEIVRTHEDLLIQIEEC-------NDRVGKL 150
Cdd:cd00160    1 RQEVIKELLQTERNYVRDLKLLVEVFLKPLDKELLpLSPEEVELLFGNIEEIYEFHRIFLKSLEERveewdksGPRIGDV 80
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 221476505 151 FLTSAPlMKKVHQAYCAAHPKAIVILDKYK---DELEKYMERQGAAtPGLLVLTTGLSKPFRRLDKYSAMLQELERHMES 227
Cdd:cd00160   81 FLKLAP-FFKIYSEYCSNHPDALELLKKLKkfnKFFQEFLEKAESE-CGRLKLESLLLKPVQRLTKYPLLLKELLKHTPD 158
                        170       180
                 ....*....|....*....|..
gi 221476505 228 SHPDRGDTQRSVAVYKDIAATC 249
Cdd:cd00160  159 GHEDREDLKKALEAIKEVASQV 180
RhoGEF smart00325
Guanine nucleotide exchange factor for Rho/Rac/Cdc42-like GTPases; Guanine nucleotide exchange ...
82-249 1.03e-41

Guanine nucleotide exchange factor for Rho/Rac/Cdc42-like GTPases; Guanine nucleotide exchange factor for Rho/Rac/Cdc42-like GTPases Also called Dbl-homologous (DH) domain. It appears that PH domains invariably occur C-terminal to RhoGEF/DH domains. Improved coverage.


Pssm-ID: 214619 [Multi-domain]  Cd Length: 180  Bit Score: 150.91  E-value: 1.03e-41
                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 221476505    82 VLKDLLDSERAHVAELQGLLENFLEPMQQT-QILSQDEYAQLMCNFVEIVRTHEDLLIQIEEC-------NDRVGKLFLT 153
Cdd:smart00325   1 VLKELLQTERNYVRDLKLLVEVFLKPLKKElKLLSPNELETLFGNIEEIYEFHRDFLDELEERieewddsVERIGDVFLK 80
                           90       100       110       120       130       140       150       160
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 221476505   154 SAPlMKKVHQAYCAAHPKAIVILDK--YKDELEKYMERQGAATP-GLLVLTTGLSKPFRRLDKYSAMLQELERHMESSHP 230
Cdd:smart00325  81 LEE-FFKIYSEYCSNHPDALELLKKlkKNPRFQKFLKEIESSPQcRRLTLESLLLKPVQRLTKYPLLLKELLKHTPEDHE 159
                          170
                   ....*....|....*....
gi 221476505   231 DRGDTQRSVAVYKDIAATC 249
Cdd:smart00325 160 DREDLKKALKAIKELANQV 178
SH3_PIX cd11877
Src Homology 3 domain of Pak Interactive eXchange factors; PIX proteins are Rho guanine ...
6-58 1.29e-31

Src Homology 3 domain of Pak Interactive eXchange factors; PIX proteins are Rho guanine nucleotide exchange factors (GEFs), which activate small GTPases by exchanging bound GDP for free GTP. They act as GEFs for both Cdc42 and Rac 1, and have been implicated in cell motility, adhesion, neurite outgrowth, and cell polarity. Vertebrates contain two proteins from the PIX subfamily, alpha-PIX and beta-PIX. Alpha-PIX, also called ARHGEF6, is localized in dendritic spines where it regulates spine morphogenesis. Mutations in the ARHGEF6 gene cause X-linked intellectual disability in humans. Beta-PIX play roles in regulating neuroendocrine exocytosis, focal adhesion maturation, cell migration, synaptic vesicle localization, and insulin secretion. PIX proteins contain an N-terminal SH3 domain followed by RhoGEF (also called Dbl-homologous or DH) and Pleckstrin Homology (PH) domains, and a C-terminal leucine-zipper domain for dimerization. The SH3 domain of PIX binds to an atypical PxxxPR motif in p21-activated kinases (PAKs) with high affinity. The binding of PAKs to PIX facilitate the localization of PAKs to focal complexes and also localizes PAKs to PIX targets Cdc43 and Rac, leading to the activation of PAKs. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212810 [Multi-domain]  Cd Length: 53  Bit Score: 117.42  E-value: 1.29e-31
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|...
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd11877    1 LVRAKFNFEGTNEDELSFDKGDIITVTQVVEGGWWEGTLNGKTGWFPSNYVKE 53
RhoGEF pfam00621
RhoGEF domain; Guanine nucleotide exchange factor for Rho/Rac/Cdc42-like GTPases Also called ...
82-249 3.31e-30

RhoGEF domain; Guanine nucleotide exchange factor for Rho/Rac/Cdc42-like GTPases Also called Dbl-homologous (DH) domain. It appears that pfam00169 domains invariably occur C-terminal to RhoGEF/DH domains.


Pssm-ID: 459876 [Multi-domain]  Cd Length: 176  Bit Score: 117.79  E-value: 3.31e-30
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 221476505   82 VLKDLLDSERAHVAELQGLLENFLEPMQQTQILSQDEYAQLMCNFVEIVRTHEDLLIQI----EECNDRVGKLFLTSAPL 157
Cdd:pfam00621   1 VIKELLQTERSYVRDLEILVEVFLPPNSKPLSESEEEIKTIFSNIEEIYELHRQLLLEEllkeWISIQRIGDIFLKFAPG 80
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 221476505  158 MKkVHQAYCAAHPKAIVILDKYKDELEKYM----ERQGAATPGLLVLTTGLSKPFRRLDKYSAMLQELERHMESSHPDRG 233
Cdd:pfam00621  81 FK-VYSTYCSNYPKALKLLKKLLKKNPKFRafleELEANPECRGLDLNSFLIKPVQRIPRYPLLLKELLKHTPPDHPDYE 159
                         170
                  ....*....|....*.
gi 221476505  234 DTQRSVAVYKDIAATC 249
Cdd:pfam00621 160 DLKKALEAIKEVAKQI 175
SH3_betaPIX cd12061
Src Homology 3 domain of beta-Pak Interactive eXchange factor; Beta-PIX, also called Rho ...
6-58 3.79e-23

Src Homology 3 domain of beta-Pak Interactive eXchange factor; Beta-PIX, also called Rho guanine nucleotide exchange factor 7 (ARHGEF7) or Cool (Cloned out of Library)-1, activates small GTPases by exchanging bound GDP for free GTP. It acts as a GEF for both Cdc42 and Rac 1, and plays important roles in regulating neuroendocrine exocytosis, focal adhesion maturation, cell migration, synaptic vesicle localization, and insulin secretion. PIX proteins contain an N-terminal SH3 domain followed by RhoGEF (also called Dbl-homologous or DH) and Pleckstrin Homology (PH) domains, and a C-terminal leucine-zipper domain for dimerization. The SH3 domain of PIX binds to an atypical PxxxPR motif in p21-activated kinases (PAKs) with high affinity. The binding of PAKs to PIX facilitate the localization of PAKs to focal complexes and also localizes PAKs to PIX targets Cdc43 and Rac, leading to the activation of PAKs. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212994 [Multi-domain]  Cd Length: 54  Bit Score: 93.21  E-value: 3.79e-23
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|...
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd12061    1 VVRAKFNFQQTNEDELSFSKGDVIHVTRVEEGGWWEGTHNGRTGWFPSNYVRE 53
SH3_alphaPIX cd12060
Src Homology 3 domain of alpha-Pak Interactive eXchange factor; Alpha-PIX, also called Rho ...
5-60 1.52e-22

Src Homology 3 domain of alpha-Pak Interactive eXchange factor; Alpha-PIX, also called Rho guanine nucleotide exchange factor 6 (ARHGEF6) or Cool (Cloned out of Library)-2, activates small GTPases by exchanging bound GDP for free GTP. It acts as a GEF for both Cdc42 and Rac 1, and is localized in dendritic spines where it regulates spine morphogenesis. It controls dendritic length and spine density in the hippocampus. Mutations in the ARHGEF6 gene cause X-linked intellectual disability in humans. PIX proteins contain an N-terminal SH3 domain followed by RhoGEF (also called Dbl-homologous or DH) and Pleckstrin Homology (PH) domains, and a C-terminal leucine-zipper domain for dimerization. The SH3 domain of PIX binds to an atypical PxxxPR motif in p21-activated kinases (PAKs) with high affinity. The binding of PAKs to PIX facilitate the localization of PAKs to focal complexes and also localizes PAKs to PIX targets Cdc43 and Rac, leading to the activation of PAKs. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212993  Cd Length: 58  Bit Score: 91.60  E-value: 1.52e-22
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*.
gi 221476505   5 LVVQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVNECK 60
Cdd:cd12060    2 LVVKARFNFKQTNEDELSVCKGDIIYVTRVEEGGWWEGTLNGKTGWFPSNYVREIK 57
SH3 smart00326
Src homology 3 domains; Src homology 3 (SH3) domains bind to target proteins through sequences ...
3-56 4.40e-20

Src homology 3 domains; Src homology 3 (SH3) domains bind to target proteins through sequences containing proline and hydrophobic amino acids. Pro-containing polypeptides may bind to SH3 domains in 2 different binding orientations.


Pssm-ID: 214620 [Multi-domain]  Cd Length: 56  Bit Score: 84.51  E-value: 4.40e-20
                           10        20        30        40        50
                   ....*....|....*....|....*....|....*....|....*....|....*
gi 221476505     3 QPLVVQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLND-KTGWFPSNYV 56
Cdd:smart00326   1 EGPQVRALYDYTAQDPDELSFKKGDIITVLEKSDDGWWKGRLGRgKEGLFPSNYV 55
SH3 cd00174
Src Homology 3 domain superfamily; Src Homology 3 (SH3) domains are protein interaction ...
6-55 6.19e-19

Src Homology 3 domain superfamily; Src Homology 3 (SH3) domains are protein interaction domains that bind proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. Thus, they are referred to as proline-recognition domains (PRDs). SH3 domains are less selective and show more diverse specificity compared to other PRDs. They have been shown to bind peptide sequences that lack the PxxP motif; examples include the PxxDY motif of Eps8 and the RKxxYxxY sequence in SKAP55. SH3 domain containing proteins play versatile and diverse roles in the cell, including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies, among others. Many members of this superfamily are adaptor proteins that associate with a number of protein partners, facilitating complex formation and signal transduction.


Pssm-ID: 212690 [Multi-domain]  Cd Length: 51  Bit Score: 80.97  E-value: 6.19e-19
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|.
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLND-KTGWFPSNY 55
Cdd:cd00174    1 YARALYDYEAQDDDELSFKKGDIITVLEKDDDGWWEGELNGgREGLFPANY 51
SH3_Intersectin_5 cd11840
Fifth Src homology 3 domain (or SH3E) of Intersectin; Intersectins (ITSNs) are adaptor ...
7-58 1.15e-17

Fifth Src homology 3 domain (or SH3E) of Intersectin; Intersectins (ITSNs) are adaptor proteins that function in exo- and endocytosis, actin cytoskeletal reorganization, and signal transduction. They are essential for initiating clathrin-coated pit formation. They bind to many proteins through their multidomain structure and facilitate the assembly of multimeric complexes. Vertebrates contain two ITSN proteins, ITSN1 and ITSN2, which exist in alternatively spliced short and long isoforms. The short isoforms contain two Eps15 homology domains (EH1 and EH2), a coiled-coil region and five SH3 domains (SH3A-E), while the long isoforms, in addition, contain RhoGEF (also called Dbl-homologous or DH), Pleckstrin homology (PH) and C2 domains. ITSN1 and ITSN2 are both widely expressed, with variations depending on tissue type and stage of development. The fifth SH3 domain (or SH3E) of ITSN1 has been shown to bind many protein partners including SGIP1, Sos1, dynamin1/2, CIN85, c-Cbl, SHIP2, N-WASP, and synaptojanin-1, among others. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212774 [Multi-domain]  Cd Length: 53  Bit Score: 77.46  E-value: 1.15e-17
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|..
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd11840    2 VIALFPYTAQNEDELSFQKGDIINVLSKDDPDWWRGELNGQTGLFPSNYVEP 53
SH3_GRB2_like_C cd11805
C-terminal Src homology 3 domain of Growth factor receptor-bound protein 2 (GRB2) and related ...
7-56 3.80e-17

C-terminal Src homology 3 domain of Growth factor receptor-bound protein 2 (GRB2) and related proteins; This family includes the adaptor protein GRB2 and related proteins including Drosophila melanogaster Downstream of receptor kinase (DRK), Caenorhabditis elegans Sex muscle abnormal protein 5 (Sem-5), GRB2-related adaptor protein (GRAP), GRAP2, and similar proteins. Family members contain an N-terminal SH3 domain, a central SH2 domain, and a C-terminal SH3 domain. GRB2/Sem-5/DRK is a critical signaling molecule that regulates the Ras pathway by linking tyrosine kinases to the Ras guanine nucleotide releasing protein Sos (son of sevenless), which converts Ras to the active GTP-bound state. GRAP2 plays an important role in T cell receptor (TCR) signaling by promoting the formation of the SLP-76:LAT complex, which couples the TCR to the Ras pathway. GRAP acts as a negative regulator of T cell receptor (TCR)-induced lymphocyte proliferation by downregulating the signaling to the Ras/ERK pathway. The C-terminal SH3 domains (SH3c) of GRB2 and GRAP2 have been shown to bind to classical PxxP motif ligands, as well as to non-classical motifs. GRB2 SH3c binds Gab2 (Grb2-associated binder 2) through epitopes containing RxxK motifs, while the SH3c of GRAP2 binds to the phosphatase-like protein HD-PTP via a RxxxxK motif. SH3 domains are protein interaction domains that typically bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212739 [Multi-domain]  Cd Length: 53  Bit Score: 76.13  E-value: 3.80e-17
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11805    2 VQALYDFNPQEPGELEFRRGDIITVLDSSDPDWWKGELRGRVGIFPANYV 51
SH3_Nostrin cd11823
Src homology 3 domain of Nitric Oxide Synthase TRaffic INducer; Nostrin is expressed in ...
9-58 1.82e-16

Src homology 3 domain of Nitric Oxide Synthase TRaffic INducer; Nostrin is expressed in endothelial and epithelial cells and is involved in the regulation, trafficking and targeting of endothelial NOS (eNOS). It facilitates the endocytosis of eNOS by coordinating the functions of dynamin and the Wiskott-Aldrich syndrome protein (WASP). Increased expression of Nostrin may be correlated to preeclampsia. Nostrin contains an N-terminal F-BAR domain and a C-terminal SH3 domain. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212757 [Multi-domain]  Cd Length: 53  Bit Score: 73.92  E-value: 1.82e-16
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|
gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd11823    4 ALYSYTANREDELSLQPGDIIEVHEKQDDGWWLGELNGKKGIFPATYVEE 53
SH3_Abi cd11826
Src homology 3 domain of Abl Interactor proteins; Abl interactor (Abi) proteins are adaptor ...
7-56 6.53e-15

Src homology 3 domain of Abl Interactor proteins; Abl interactor (Abi) proteins are adaptor proteins serving as binding partners and substrates of Abl tyrosine kinases. They are involved in regulating actin cytoskeletal reorganization and play important roles in membrane-ruffling, endocytosis, cell motility, and cell migration. They localize to sites of actin polymerization in epithelial adherens junction and immune synapses, as well as to the leading edge of lamellipodia. Vertebrates contain two Abi proteins, Abi1 and Abi2. Abi1 displays a wide expression pattern while Abi2 is highly expressed in the eye and brain. Abi proteins contain a homeobox homology domain, a proline-rich region, and a SH3 domain. The SH3 domain of Abi binds to a PxxP motif in Abl. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212760 [Multi-domain]  Cd Length: 52  Bit Score: 69.66  E-value: 6.53e-15
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11826    2 VVALYDYTADKDDELSFQEGDIIYVTKKNDDGWYEGVLNGVTGLFPGNYV 51
SH3_OSTF1 cd11772
Src Homology 3 domain of metazoan osteoclast stimulating factor 1; OSTF1, also named OSF or ...
6-58 1.95e-14

Src Homology 3 domain of metazoan osteoclast stimulating factor 1; OSTF1, also named OSF or SH3P2, is a signaling protein containing SH3 and ankyrin-repeat domains. It acts through a Src-related pathway to enhance the formation of osteoclasts and bone resorption. It also acts as a negative regulator of cell motility. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212706 [Multi-domain]  Cd Length: 53  Bit Score: 68.48  E-value: 1.95e-14
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|...
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd11772    1 VFRALYDYEAQHPDELSFEEGDLLYISDKSDPNWWKATCGGKTGLIPSNYVEE 53
SH3_CD2AP-like_1 cd11873
First Src Homology 3 domain (SH3A) of CD2-associated protein and similar proteins; This ...
7-58 2.81e-14

First Src Homology 3 domain (SH3A) of CD2-associated protein and similar proteins; This subfamily is composed of the first SH3 domain (SH3A) of CD2AP, CIN85 (Cbl-interacting protein of 85 kDa), and similar domains. CD2AP and CIN85 are adaptor proteins that bind to protein partners and assemble complexes that have been implicated in T cell activation, kidney function, and apoptosis of neuronal cells. They also associate with endocytic proteins, actin cytoskeleton components, and other adaptor proteins involved in receptor tyrosine kinase (RTK) signaling. CD2AP and the main isoform of CIN85 contain three SH3 domains, a proline-rich region, and a C-terminal coiled-coil domain. All of these domains enable CD2AP and CIN85 to bind various protein partners and assemble complexes that have been implicated in many different functions. SH3A of both proteins bind to an atypical PXXXPR motif at the C-terminus of Cbl and the cytoplasmic domain of the cell adhesion protein CD2. CIN85 SH3A binds to internal proline-rich motifs within the proline-rich region; this intramolecular interaction serves as a regulatory mechanism to keep CIN85 in a closed conformation, preventing the recruitment of other proteins. CIN85 SH3A has also been shown to bind ubiquitin. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212806 [Multi-domain]  Cd Length: 53  Bit Score: 67.68  E-value: 2.81e-14
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|..
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd11873    2 VIVEFDYDAEEPDELTLKVGDIITNVKKMEEGWWEGTLNGKRGMFPDNFVKV 53
SH3_Intersectin_3 cd11838
Third Src homology 3 domain (or SH3C) of Intersectin; Intersectins (ITSNs) are adaptor ...
8-58 2.86e-14

Third Src homology 3 domain (or SH3C) of Intersectin; Intersectins (ITSNs) are adaptor proteins that function in exo- and endocytosis, actin cytoskeletal reorganization, and signal transduction. They are essential for initiating clathrin-coated pit formation. They bind to many proteins through their multidomain structure and facilitate the assembly of multimeric complexes. Vertebrates contain two ITSN proteins, ITSN1 and ITSN2, which exist in alternatively spliced short and long isoforms. The short isoforms contain two Eps15 homology domains (EH1 and EH2), a coiled-coil region and five SH3 domains (SH3A-E), while the long isoforms, in addition, contain RhoGEF (also called Dbl-homologous or DH), Pleckstrin homology (PH) and C2 domains. ITSN1 and ITSN2 are both widely expressed, with variations depending on tissue type and stage of development. The third SH3 domain (or SH3C) of ITSN1 has been shown to bind many proteins including dynamin1/2, CIN85, c-Cbl, SHIP2, Reps1, synaptojanin-1, and WNK, among others. The SH3C of ITSN2 has been shown to bind the K15 protein of Kaposi's sarcoma-associated herpesvirus. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212772 [Multi-domain]  Cd Length: 52  Bit Score: 67.82  E-value: 2.86e-14
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|.
gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQReDGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd11838    3 IALYPYESNEPGDLTFNAGDVILVTKK-DGEWWTGTIGDRTGIFPSNYVRP 52
SH3_PLCgamma cd11825
Src homology 3 domain of Phospholipase C (PLC) gamma; PLC catalyzes the hydrolysis of ...
7-58 5.30e-14

Src homology 3 domain of Phospholipase C (PLC) gamma; PLC catalyzes the hydrolysis of phosphatidylinositol (4,5)-bisphosphate [PtdIns(4,5)P2] to produce Ins(1,4,5)P3 and diacylglycerol (DAG) in response to various receptors. Ins(1,4,5)P3 initiates the calcium signaling cascade while DAG functions as an activator of PKC. PLCgamma catalyzes this reaction in tyrosine kinase-dependent signaling pathways. It is activated and recruited to its substrate at the membrane. Vertebrates contain two forms of PLCgamma, PLCgamma1, which is widely expressed, and PLCgamma2, which is primarily found in haematopoietic cells. PLCgamma contains a Pleckstrin homology (PH) domain followed by an elongation factor (EF) domain, two catalytic regions of PLC domains that flank two tandem SH2 domains, followed by a SH3 domain and C2 domain. The SH3 domain of PLCgamma1 directly interacts with dynamin-1 and can serve as a guanine nucleotide exchange factor (GEF). It also interacts with Cbl, inhibiting its phosphorylation and activity. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212759 [Multi-domain]  Cd Length: 54  Bit Score: 66.97  E-value: 5.30e-14
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|...
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDK-TGWFPSNYVNE 58
Cdd:cd11825    2 VKALYDYRAQRPDELSFCKHAIITNVEKEDGGWWRGDYGGKkQKWFPANYVEE 54
SH3_Nck_2 cd11766
Second Src Homology 3 domain of Nck adaptor proteins; Nck adaptor proteins regulate actin ...
6-58 6.08e-14

Second Src Homology 3 domain of Nck adaptor proteins; Nck adaptor proteins regulate actin cytoskeleton dynamics by linking proline-rich effector molecules to protein tyrosine kinases and phosphorylated signaling intermediates. They contain three SH3 domains and a C-terminal SH2 domain. They function downstream of the PDGFbeta receptor and are involved in Rho GTPase signaling and actin dynamics. Vertebrates contain two Nck adaptor proteins: Nck1 (also called Nckalpha) and Nck2 (also called Nckbeta or Growth factor receptor-bound protein 4, Grb4), which show partly overlapping functions but also bind distinct targets. Their SH3 domains are involved in recruiting downstream effector molecules, such as the N-WASP/Arp2/3 complex, which when activated induces actin polymerization that results in the production of pedestals, or protrusions of the plasma membrane. The second SH3 domain of Nck appears to prefer ligands containing the APxxPxR motif. SH3 domains are protein interaction domains that usually bind to proline-rich ligands with moderate affinity and selectivity, preferentially a PxxP motif. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212700 [Multi-domain]  Cd Length: 53  Bit Score: 66.91  E-value: 6.08e-14
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|...
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd11766    1 PAVVKFNYEAQREDELSLRKGDRVLVLEKSSDGWWRGECNGQVGWFPSNYVTE 53
SH3_CD2AP-like_2 cd11874
Second Src Homology 3 domain (SH3B) of CD2-associated protein and similar proteins; This ...
8-58 8.00e-14

Second Src Homology 3 domain (SH3B) of CD2-associated protein and similar proteins; This subfamily is composed of the second SH3 domain (SH3B) of CD2AP, CIN85 (Cbl-interacting protein of 85 kDa), and similar domains. CD2AP and CIN85 are adaptor proteins that bind to protein partners and assemble complexes that have been implicated in T cell activation, kidney function, and apoptosis of neuronal cells. They also associate with endocytic proteins, actin cytoskeleton components, and other adaptor proteins involved in receptor tyrosine kinase (RTK) signaling. CD2AP and the main isoform of CIN85 contain three SH3 domains, a proline-rich region, and a C-terminal coiled-coil domain. All of these domains enable CD2AP and CIN85 to bind various protein partners and assemble complexes that have been implicated in many different functions. SH3B of both proteins have been shown to bind to Cbl. In the case of CD2AP, its SH3B binds to Cbl at a site distinct from the c-Cbl/SH3A binding site. The CIN85 SH3B also binds ubiquitin. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212807 [Multi-domain]  Cd Length: 53  Bit Score: 66.59  E-value: 8.00e-14
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|.
gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd11874    3 KVLFSYTPQNEDELELKVGDTIEVLGEVEEGWWEGKLNGKVGVFPSNFVKE 53
SH3_Intersectin1_3 cd11991
Third Src homology 3 domain (or SH3C) of Intersectin-1; Intersectin-1 (ITSN1) is an adaptor ...
9-56 1.00e-13

Third Src homology 3 domain (or SH3C) of Intersectin-1; Intersectin-1 (ITSN1) is an adaptor protein that functions in exo- and endocytosis, actin cytoskeletal reorganization, and signal transduction. It plays a role in clathrin-coated pit (CCP) formation. It binds to many proteins through its multidomain structure and facilitate the assembly of multimeric complexes. ITSN1 localizes in membranous organelles, CCPs, the Golgi complex, and may be involved in the cell membrane trafficking system. It exists in alternatively spliced short and long isoforms. The short isoform contains two Eps15 homology domains (EH1 and EH2), a coiled-coil region and five SH3 domains (SH3A-E), while the long isoform, in addition, contains RhoGEF (also called Dbl-homologous or DH), Pleckstrin homology (PH) and C2 domains. The third SH3 domain (or SH3C) of ITSN1 has been shown to bind many proteins including dynamin1/2, CIN85, c-Cbl, SHIP2, Reps1, synaptojanin-1, and WNK, among others. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212924  Cd Length: 52  Bit Score: 66.16  E-value: 1.00e-13
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*...
gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQReDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11991    4 AMYTYESNEQGDLTFQQGDVILVTKK-DGDWWTGTVGDKTGVFPSNYV 50
SH3_Intersectin_1 cd11836
First Src homology 3 domain (or SH3A) of Intersectin; Intersectins (ITSNs) are adaptor ...
8-56 1.20e-13

First Src homology 3 domain (or SH3A) of Intersectin; Intersectins (ITSNs) are adaptor proteins that function in exo- and endocytosis, actin cytoskeletal reorganization, and signal transduction. They are essential for initiating clathrin-coated pit formation. They bind to many proteins through their multidomain structure and facilitate the assembly of multimeric complexes. Vertebrates contain two ITSN proteins, ITSN1 and ITSN2, which exist in alternatively spliced short and long isoforms. The short isoforms contain two Eps15 homology domains (EH1 and EH2), a coiled-coil region and five SH3 domains (SH3A-E), while the long isoforms, in addition, contain RhoGEF (also called Dbl-homologous or DH), Pleckstrin homology (PH) and C2 domains. ITSN1 and ITSN2 are both widely expressed, with variations depending on tissue type and stage of development. The first SH3 domain (or SH3A) of ITSN1 has been shown to bind many proteins including Sos1, dynamin1/2, CIN85, c-Cbl, PI3K-C2, SHIP2, N-WASP, and CdGAP, among others. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212770 [Multi-domain]  Cd Length: 55  Bit Score: 66.23  E-value: 1.20e-13
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|.
gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQREDG--GWWEGTLNDKTGWFPSNYV 56
Cdd:cd11836    3 RALYAFEARNPDEISFQPGDIIQVDESQVAepGWLAGELKGKTGWFPANYV 53
SH3_CIN85_2 cd12055
Second Src Homology 3 domain (SH3B) of Cbl-interacting protein of 85 kDa; CIN85, also called ...
8-58 4.04e-13

Second Src Homology 3 domain (SH3B) of Cbl-interacting protein of 85 kDa; CIN85, also called SH3 domain-containing kinase-binding protein 1 (SH3KBP1) or CD2-binding protein 3 (CD2BP3) or Ruk, is an adaptor protein that is involved in the downregulation of receptor tyrosine kinases by facilitating endocytosis through interaction with endophilin-associated ubiquitin ligase Cbl proteins. It is also important in many other cellular processes including vesicle-mediated transport, cytoskeletal remodelling, apoptosis, cell adhesion and migration, and viral infection, among others. CIN85 exists as multiple variants from alternative splicing; the main variant contains three SH3 domains, a proline-rich region, and a C-terminal coiled-coil domain. All of these domains enable CIN85 to bind various protein partners and assemble complexes that have been implicated in many different functions. This alignment model represents the second SH3 domain (SH3B) of CIN85. SH3B has been shown to bind Cbl proline-rich peptides and ubiquitin. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212988 [Multi-domain]  Cd Length: 53  Bit Score: 64.63  E-value: 4.04e-13
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|.
gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd12055    3 QVAFSYLPQNEDELELKVGDIIEVVGEVEEGWWEGVLNGKTGMFPSNFIKE 53
SH3_Sdc25 cd11883
Src Homology 3 domain of Sdc25/Cdc25 guanine nucleotide exchange factors; This subfamily is ...
6-55 4.12e-13

Src Homology 3 domain of Sdc25/Cdc25 guanine nucleotide exchange factors; This subfamily is composed of the Saccharomyces cerevisiae guanine nucleotide exchange factors (GEFs) Sdc25 and Cdc25, and similar proteins. These GEFs regulate Ras by stimulating the GDP/GTP exchange on Ras. Cdc25 is involved in the Ras/PKA pathway that plays an important role in the regulation of metabolism, stress responses, and proliferation, depending on available nutrients and conditions. Proteins in this subfamily contain an N-terminal SH3 domain as well as REM (Ras exchanger motif) and RasGEF domains at the C-terminus. SH3 domains bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs; they play a role in the regulation of enzymes by intramolecular interactions, changing the subcellular localization of signal pathway components and mediate multiprotein complex assemblies.


Pssm-ID: 212816  Cd Length: 55  Bit Score: 64.61  E-value: 4.12e-13
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                 ....*....|....*....|....*....|....*....|....*....|....*
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLND-----KTGWFPSNY 55
Cdd:cd11883    1 VVVALYDFTPKSKNQLSFKAGDIIYVLNKDPSGWWDGVIISssgkvKRGWFPSNY 55
SH3_9 pfam14604
Variant SH3 domain;
9-56 4.93e-13

Variant SH3 domain;


Pssm-ID: 434066 [Multi-domain]  Cd Length: 49  Bit Score: 64.17  E-value: 4.93e-13
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                  ....*....|....*....|....*....|....*....|....*...
gi 221476505    9 AEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:pfam14604   1 ALYPYEPKDDDELSLQRGDVITVIEESEDGWWEGINTGRTGLVPANYV 48
SH3_SH3YL1_like cd11841
Src homology 3 domain of SH3 domain containing Ysc84-like 1 (SH3YL1) protein; SH3YL1 localizes ...
6-56 5.04e-13

Src homology 3 domain of SH3 domain containing Ysc84-like 1 (SH3YL1) protein; SH3YL1 localizes to the plasma membrane and is required for dorsal ruffle formation. It binds phosphoinositides (PIs) with high affinity through its N-terminal SYLF domain (also called DUF500). In addition, SH3YL1 contains a C-terminal SH3 domain which has been reported to bind to N-WASP, dynamin 2, and SHIP2 (a PI 5-phosphatase). SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212775  Cd Length: 54  Bit Score: 64.34  E-value: 5.04e-13
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                 ....*....|....*....|....*....|....*....|....*....|...
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQREDG--GWWEGTLNDKTGWFPSNYV 56
Cdd:cd11841    1 EVTALYSFEGQQPCDLSFQAGDRITVLTRTDSqfDWWEGRLRGRVGIFPANYV 53
SH3_2 pfam07653
Variant SH3 domain; SH3 (Src homology 3) domains are often indicative of a protein involved in ...
6-59 5.28e-13

Variant SH3 domain; SH3 (Src homology 3) domains are often indicative of a protein involved in signal transduction related to cytoskeletal organization. First described in the Src cytoplasmic tyrosine kinase. The structure is a partly opened beta barrel.


Pssm-ID: 429575 [Multi-domain]  Cd Length: 54  Bit Score: 64.15  E-value: 5.28e-13
                          10        20        30        40        50
                  ....*....|....*....|....*....|....*....|....*....|....
gi 221476505    6 VVQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVNEC 59
Cdd:pfam07653   1 YGRVIFDYVGTDKNGLTLKKGDVVKVLGKDNDGWWEGETGGRVGLVPSTAVEEI 54
SH3_D21-like cd12142
Src Homology 3 domain of SH3 domain-containing protein 21 (SH3D21) and similar proteins; ...
17-56 1.21e-12

Src Homology 3 domain of SH3 domain-containing protein 21 (SH3D21) and similar proteins; N-terminal SH3 domain of the uncharacterized protein SH3 domain-containing protein 21, and similar uncharacterized domains, it belongs to the CD2AP-like_3 subfamily of proteins. The CD2AP-like_3 subfamily is composed of the third SH3 domain (SH3C) of CD2AP, CIN85 (Cbl-interacting protein of 85 kDa), and similar domains. CD2AP and CIN85 are adaptor proteins that bind to protein partners and assemble complexes that have been implicated in T cell activation, kidney function, and apoptosis of neuronal cells. They also associate with endocytic proteins, actin cytoskeleton components, and other adaptor proteins involved in receptor tyrosine kinase (RTK) signaling. CD2AP and the main isoform of CIN85 contain three SH3 domains, a proline-rich region, and a C-terminal coiled-coil domain. All of these domains enable CD2AP and CIN85 to bind various protein partners and assemble complexes that have been implicated in many different functions. SH3C of both proteins have been shown to bind to ubiquitin. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 213018 [Multi-domain]  Cd Length: 55  Bit Score: 63.25  E-value: 1.21e-12
                         10        20        30        40
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gi 221476505  17 NNDELCFQKGDVITVTQR--EDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd12142   12 APDELALKKGDVIEVISKetEDEGWWEGELNGRRGFFPDNFV 53
SH3_1 pfam00018
SH3 domain; SH3 (Src homology 3) domains are often indicative of a protein involved in signal ...
8-53 1.64e-12

SH3 domain; SH3 (Src homology 3) domains are often indicative of a protein involved in signal transduction related to cytoskeletal organization. First described in the Src cytoplasmic tyrosine kinase. The structure is a partly opened beta barrel.


Pssm-ID: 394975 [Multi-domain]  Cd Length: 47  Bit Score: 62.61  E-value: 1.64e-12
                          10        20        30        40
                  ....*....|....*....|....*....|....*....|....*..
gi 221476505    8 QAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLN-DKTGWFPS 53
Cdd:pfam00018   1 VALYDYTAQEPDELSFKKGDIIIVLEKSEDGWWKGRNKgGKEGLIPS 47
SH3_GRAP_C cd11951
C-terminal Src homology 3 domain of GRB2-related adaptor protein; GRAP is a GRB-2 like adaptor ...
7-57 1.65e-12

C-terminal Src homology 3 domain of GRB2-related adaptor protein; GRAP is a GRB-2 like adaptor protein that is highly expressed in lymphoid tissues. It acts as a negative regulator of T cell receptor (TCR)-induced lymphocyte proliferation by downregulating the signaling to the Ras/ERK pathway. It has been identified as a regulator of TGFbeta signaling in diabetic kidney tubules and may have a role in the pathogenesis of the disease. GRAP contains an N-terminal SH3 domain, a central SH2 domain, and a C-terminal SH3 domain. The C-terminal SH3 domains (SH3c) of the related proteins, GRB2 and GRAP2, have been shown to bind to classical PxxP motif ligands, as well as to non-classical motifs. GRB2 SH3c binds Gab2 (Grb2-associated binder 2) through epitopes containing RxxK motifs, while the SH3c of GRAP2 binds to the phosphatase-like protein HD-PTP via a RxxxxK motif. SH3 domains are protein interaction domains that typically bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212884  Cd Length: 53  Bit Score: 62.90  E-value: 1.65e-12
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                 ....*....|....*....|....*....|....*....|....*....|.
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVN 57
Cdd:cd11951    2 VQAQYDFSAEDPSQLSFRRGDIIEVLDCPDPNWWRGRISGRVGFFPRNYVH 52
SH3_Intersectin1_5 cd11995
Fifth Src homology 3 domain (or SH3E) of Intersectin-1; Intersectin-1 (ITSN1) is an adaptor ...
11-56 1.67e-12

Fifth Src homology 3 domain (or SH3E) of Intersectin-1; Intersectin-1 (ITSN1) is an adaptor protein that functions in exo- and endocytosis, actin cytoskeletal reorganization, and signal transduction. It plays a role in clathrin-coated pit (CCP) formation. It binds to many proteins through its multidomain structure and facilitate the assembly of multimeric complexes. ITSN1 localizes in membranous organelles, CCPs, the Golgi complex, and may be involved in the cell membrane trafficking system. It exists in alternatively spliced short and long isoforms. The short isoform contains two Eps15 homology domains (EH1 and EH2), a coiled-coil region and five SH3 domains (SH3A-E), while the long isoform, in addition, contains RhoGEF (also called Dbl-homologous or DH), Pleckstrin homology (PH) and C2 domains. The fifth SH3 domain (or SH3E) of ITSN1 has been shown to bind many protein partners including SGIP1, Sos1, dynamin1/2, CIN85, c-Cbl, SHIP2, N-WASP, and synaptojanin-1, among others. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212928 [Multi-domain]  Cd Length: 54  Bit Score: 63.05  E-value: 1.67e-12
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*.
gi 221476505  11 YSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11995    7 YDYTAQNDDELAFSKGQIINVLNKEDPDWWKGELNGQVGLFPSNYV 52
SH3_GRAF-like cd11882
Src Homology 3 domain of GTPase Regulator Associated with Focal adhesion kinase and similar ...
7-56 2.60e-12

Src Homology 3 domain of GTPase Regulator Associated with Focal adhesion kinase and similar proteins; This subfamily is composed of Rho GTPase activating proteins (GAPs) with similarity to GRAF. Members contain an N-terminal BAR domain, followed by a Pleckstrin homology (PH) domain, a Rho GAP domain, and a C-terminal SH3 domain. Although vertebrates harbor four Rho GAPs in the GRAF subfamily including GRAF, GRAF2, GRAF3, and Oligophrenin-1 (OPHN1), only three are included in this model. OPHN1 contains the BAR, PH and GAP domains, but not the C-terminal SH3 domain. GRAF and GRAF2 show GAP activity towards RhoA and Cdc42. GRAF influences Rho-mediated cytoskeletal rearrangements and binds focal adhesion kinase. GRAF2 regulates caspase-activated p21-activated protein kinase-2. The SH3 domain of GRAF and GRAF2 binds PKNbeta, a target of the small GTPase Rho. SH3 domains bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs; they play a role in the regulation of enzymes by intramolecular interactions, changing the subcellular localization of signal pathway components and mediate multiprotein complex assemblies.


Pssm-ID: 212815 [Multi-domain]  Cd Length: 54  Bit Score: 62.31  E-value: 2.60e-12
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                 ....*....|....*....|....*....|....*....|....*....|.
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVIT-VTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11882    2 ARALYACKAEDESELSFEPGQIITnVQPSDEPGWLEGTLNGRTGLIPENYV 52
SH3_Intersectin2_5 cd11996
Fifth Src homology 3 domain (or SH3E) of Intersectin-2; Intersectin-2 (ITSN2) is an adaptor ...
7-56 2.87e-12

Fifth Src homology 3 domain (or SH3E) of Intersectin-2; Intersectin-2 (ITSN2) is an adaptor protein that functions in exo- and endocytosis, actin cytoskeletal reorganization, and signal transduction. It plays a role in clathrin-coated pit (CCP) formation. It binds to many proteins through its multidomain structure and facilitate the assembly of multimeric complexes. ITSN2 also functions as a specific GEF for Cdc42 activation in epithelial morphogenesis, and is required in mitotic spindle orientation. It exists in alternatively spliced short and long isoforms. The short isoform contains two Eps15 homology domains (EH1 and EH2), a coiled-coil region and five SH3 domains (SH3A-E), while the long isoform, in addition, contains RhoGEF (also called Dbl-homologous or DH), Pleckstrin homology (PH) and C2 domains. The fifth SH3 domain (or SH3E) of ITSN2 is expected to bind protein partners, similar to ITSN1 which has been shown to bind many protein partners including SGIP1, Sos1, dynamin1/2, CIN85, c-Cbl, SHIP2, N-WASP, and synaptojanin-1, among others. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212929 [Multi-domain]  Cd Length: 54  Bit Score: 62.31  E-value: 2.87e-12
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gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11996    3 VIAMYDYTANNEDELSFSKGQLINVLNKDDPDWWQGEINGVTGLFPSNYV 52
SH3_Endophilin_A cd11803
Src homology 3 domain of Endophilin-A; Endophilins play roles in synaptic vesicle formation, ...
8-56 3.26e-12

Src homology 3 domain of Endophilin-A; Endophilins play roles in synaptic vesicle formation, virus budding, mitochondrial morphology maintenance, receptor-mediated endocytosis inhibition, and endosomal sorting. They are classified into two types, A and B. Vertebrates contain three endophilin-A isoforms (A1, A2, and A3). Endophilin-A proteins are enriched in the brain and play multiple roles in receptor-mediated endocytosis. They tubulate membranes and regulate calcium influx into neurons to trigger the activation of the endocytic machinery. They are also involved in the sorting of plasma membrane proteins, actin filament assembly, and the uncoating of clathrin-coated vesicles for fusion with endosomes. Endophilins contain an N-terminal N-BAR domain (BAR domain with an additional N-terminal amphipathic helix), followed by a variable region containing proline clusters, and a C-terminal SH3 domain. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212737 [Multi-domain]  Cd Length: 55  Bit Score: 61.89  E-value: 3.26e-12
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*....
gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11803    4 RALYDFEPENEGELGFKEGDIITLTNQIDENWYEGMVNGQSGFFPVNYV 52
SH3_CIN85_1 cd12052
First Src Homology 3 domain (SH3A) of Cbl-interacting protein of 85 kDa; CIN85, also called ...
10-58 3.54e-12

First Src Homology 3 domain (SH3A) of Cbl-interacting protein of 85 kDa; CIN85, also called SH3 domain-containing kinase-binding protein 1 (SH3KBP1) or CD2-binding protein 3 (CD2BP3) or Ruk, is an adaptor protein that is involved in the downregulation of receptor tyrosine kinases by facilitating endocytosis through interaction with endophilin-associated ubiquitin ligase Cbl proteins. It is also important in many other cellular processes including vesicle-mediated transport, cytoskeletal remodelling, apoptosis, cell adhesion and migration, and viral infection, among others. CIN85 exists as multiple variants from alternative splicing; the main variant contains three SH3 domains, a proline-rich region, and a C-terminal coiled-coil domain. All of these domains enable CIN85 to bind various protein partners and assemble complexes that have been implicated in many different functions. This alignment model represents the first SH3 domain (SH3A) of CIN85; SH3A binds to internal proline-rich motifs within the proline-rich region. This intramolecular interaction serves as a regulatory mechanism to keep CIN85 in a closed conformation, preventing the recruitment of other proteins. SH3A has also been shown to bind ubiquitin and to an atypical PXXXPR motif at the C-terminus of Cbl and the cytoplasmic end of the cell adhesion protein CD2. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212985 [Multi-domain]  Cd Length: 53  Bit Score: 61.83  E-value: 3.54e-12
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                 ....*....|....*....|....*....|....*....|....*....
gi 221476505  10 EYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd12052    5 EFDYKAQHEDELTITVGDIITKIKKDDGGWWEGEIKGRRGLFPDNFVRE 53
SH3_CD2AP-like_3 cd11875
Third Src Homology 3 domain (SH3C) of CD2-associated protein and similar proteins; This ...
11-56 6.06e-12

Third Src Homology 3 domain (SH3C) of CD2-associated protein and similar proteins; This subfamily is composed of the third SH3 domain (SH3C) of CD2AP, CIN85 (Cbl-interacting protein of 85 kDa), and similar domains. CD2AP and CIN85 are adaptor proteins that bind to protein partners and assemble complexes that have been implicated in T cell activation, kidney function, and apoptosis of neuronal cells. They also associate with endocytic proteins, actin cytoskeleton components, and other adaptor proteins involved in receptor tyrosine kinase (RTK) signaling. CD2AP and the main isoform of CIN85 contain three SH3 domains, a proline-rich region, and a C-terminal coiled-coil domain. All of these domains enable CD2AP and CIN85 to bind various protein partners and assemble complexes that have been implicated in many different functions. SH3C of both proteins have been shown to bind to ubiquitin. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212808 [Multi-domain]  Cd Length: 55  Bit Score: 61.21  E-value: 6.06e-12
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gi 221476505  11 YSFMGSNNDELCFQKGDVITVTQRE--DGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11875    6 FDYEAENEDELTLREGDIVTILSKDceDKGWWKGELNGKRGVFPDNFV 53
SH3_Ysc84p_like cd11842
Src homology 3 domain of Ysc84p and similar fungal proteins; This family is composed of the ...
9-58 8.19e-12

Src homology 3 domain of Ysc84p and similar fungal proteins; This family is composed of the Saccharomyces cerevisiae proteins, Ysc84p (also called LAS17-binding protein 4, Lsb4p) and Lsb3p, and similar fungal proteins. They contain an N-terminal SYLF domain (also called DUF500) and a C-terminal SH3 domain. Ysc84p localizes to actin patches and plays an important in actin polymerization during endocytosis. The N-terminal domain of both Ysc84p and Lsb3p can bind and bundle actin filaments. A study of the yeast SH3 domain interactome predicts that the SH3 domains of Lsb3p and Lsb4p may function as molecular hubs for the assembly of endocytic complexes. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212776 [Multi-domain]  Cd Length: 55  Bit Score: 60.90  E-value: 8.19e-12
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                 ....*....|....*....|....*....|....*....|....*....|..
gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQREDGG--WWEGTLNDKTGWFPSNYVNE 58
Cdd:cd11842    4 ALYDFAGEQPGDLAFQKGDIITILKKSDSQndWWTGRIGGREGIFPANYVEL 55
SH3_MyoIe_If_like cd11827
Src homology 3 domain of Myosins Ie, If, and similar proteins; Myosins Ie (MyoIe) and If ...
7-58 8.30e-12

Src homology 3 domain of Myosins Ie, If, and similar proteins; Myosins Ie (MyoIe) and If (MyoIf) are nonmuscle, unconventional, long tailed, class I myosins containing an N-terminal motor domain and a myosin tail with TH1, TH2, and SH3 domains. MyoIe interacts with the endocytic proteins, dynamin and synaptojanin-1, through its SH3 domain; it may play a role in clathrin-dependent endocytosis. In the kidney, MyoIe is critical for podocyte function and normal glomerular filtration. Mutations in MyoIe is associated with focal segmental glomerulosclerosis, a disease characterized by massive proteinuria and progression to end-stage kidney disease. MyoIf is predominantly expressed in the immune system; it plays a role in immune cell motility and innate immunity. Mutations in MyoIf may be associated with the loss of hearing. The MyoIf gene has also been found to be fused to the MLL (Mixed lineage leukemia) gene in infant acute myeloid leukemias (AML). SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212761 [Multi-domain]  Cd Length: 53  Bit Score: 60.89  E-value: 8.30e-12
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|..
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd11827    2 CKALYAYDAQDTDELSFNEGDIIEILKEDPSGWWTGRLRGKEGLFPGNYVEK 53
SH3_GAS7 cd11829
Src homology 3 domain of Growth Arrest Specific protein 7; GAS7 is mainly expressed in the ...
8-56 9.01e-12

Src homology 3 domain of Growth Arrest Specific protein 7; GAS7 is mainly expressed in the brain and is required for neurite outgrowth. It may also play a role in the protection and migration of embryonic stem cells. Treatment-related acute myeloid leukemia (AML) has been reported resulting from mixed-lineage leukemia (MLL)-GAS7 translocations as a complication of primary cancer treatment. GAS7 contains an N-terminal SH3 domain, followed by a WW domain, and a central F-BAR domain. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212763 [Multi-domain]  Cd Length: 52  Bit Score: 60.61  E-value: 9.01e-12
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|
gi 221476505   8 QAEYSFMGSNNDE-LCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11829    3 RTLYAFTGEQHQQgLSFEAGELIRVLQAPDGGWWEGEKDGLRGWFPASYV 52
SH3_CD2AP_2 cd12054
Second Src Homology 3 domain (SH3B) of CD2-associated protein; CD2AP, also called CMS (Cas ...
11-58 9.79e-12

Second Src Homology 3 domain (SH3B) of CD2-associated protein; CD2AP, also called CMS (Cas ligand with Multiple SH3 domains) or METS1 (Mesenchyme-to-Epithelium Transition protein with SH3 domains), is a cytosolic adaptor protein that plays a role in regulating the cytoskeleton. It is critical in cell-to-cell union necessary for kidney function. It also stabilizes the contact between a T cell and antigen-presenting cells. It is primarily expressed in podocytes at the cytoplasmic face of the slit diaphragm and serves as a linker anchoring podocin and nephrin to the actin cytoskeleton. CD2AP contains three SH3 domains, a proline-rich region, and a C-terminal coiled-coil domain. All of these domains enable CD2AP to bind various protein partners and assemble complexes that have been implicated in many different functions. This alignment model represents the second SH3 domain (SH3B) of CD2AP. SH3B binds to c-Cbl in a site (TPSSRPLR is the core binding motif) distinct from the c-Cbl/SH3A binding site. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212987 [Multi-domain]  Cd Length: 55  Bit Score: 60.75  E-value: 9.79e-12
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*...
gi 221476505  11 YSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd12054    7 FEYVPQNEDELELKVGDIIDINEEVEEGWWSGTLNGKSGLFPSNFVKE 54
SH3_Intersectin_2 cd11837
Second Src homology 3 domain (or SH3B) of Intersectin; Intersectins (ITSNs) are adaptor ...
6-58 1.14e-11

Second Src homology 3 domain (or SH3B) of Intersectin; Intersectins (ITSNs) are adaptor proteins that function in exo- and endocytosis, actin cytoskeletal reorganization, and signal transduction. They are essential for initiating clathrin-coated pit formation. They bind to many proteins through their multidomain structure and facilitate the assembly of multimeric complexes. Vertebrates contain two ITSN proteins, ITSN1 and ITSN2, which exist in alternatively spliced short and long isoforms. The short isoforms contain two Eps15 homology domains (EH1 and EH2), a coiled-coil region and five SH3 domains (SH3A-E), while the long isoforms, in addition, contain RhoGEF (also called Dbl-homologous or DH), Pleckstrin homology (PH) and C2 domains. ITSN1 and ITSN2 are both widely expressed, with variations depending on tissue type and stage of development. The second SH3 domain (or SH3B) of ITSN1 has been shown to bind WNK and CdGAP. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212771 [Multi-domain]  Cd Length: 53  Bit Score: 60.46  E-value: 1.14e-11
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQREDGgWWEGTLND-KTGWFPSNYVNE 58
Cdd:cd11837    1 TATALYPWRAKKENHLSFAKGDIITVLEQQEM-WWFGELEGgEEGWFPKSYVKE 53
SH3_Pex13p_fungal cd11771
Src Homology 3 domain of fungal peroxisomal membrane protein Pex13p; Pex13p, located in the ...
7-56 1.37e-11

Src Homology 3 domain of fungal peroxisomal membrane protein Pex13p; Pex13p, located in the peroxisomal membrane, contains two transmembrane regions and a C-terminal SH3 domain. It binds to the peroxisomal targeting type I (PTS1) receptor Pex5p and the docking factor Pex14p through its SH3 domain. It is essential for both PTS1 and PTS2 protein import pathways into the peroxisomal matrix. Pex13p binds Pex14p, which contains a PxxP motif, in a classical fashion to the proline-rich ligand binding site of its SH3 domain. It binds the WxxxF/Y motif of Pex5p in a novel site that does not compete with Pex14p binding. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212705 [Multi-domain]  Cd Length: 60  Bit Score: 60.37  E-value: 1.37e-11
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*..
gi 221476505   7 VQAEYSFMGSNND-ELCFQKGDVITV-----TQREDGGWWEG-TLNDKTGWFPSNYV 56
Cdd:cd11771    2 CRALYDFTPENPEmELSLKKGDIVAVlsktdPLGRDSEWWKGrTRDGRIGWFPSNYV 58
SH3_VAV_2 cd11830
C-terminal (or second) Src homology 3 domain of VAV proteins; VAV proteins function both as ...
9-58 1.75e-11

C-terminal (or second) Src homology 3 domain of VAV proteins; VAV proteins function both as cytoplasmic guanine nucleotide exchange factors (GEFs) for Rho GTPases and scaffold proteins and they play important roles in cell signaling by coupling cell surface receptors to various effector functions. They play key roles in processes that require cytoskeletal reorganization including immune synapse formation, phagocytosis, cell spreading, and platelet aggregation, among others. Vertebrates have three VAV proteins (VAV1, VAV2, and VAV3). VAV proteins contain several domains that enable their function: N-terminal calponin homology (CH), acidic, RhoGEF (also called Dbl-homologous or DH), Pleckstrin Homology (PH), C1 (zinc finger), SH2, and two SH3 domains. The SH3 domain of VAV is involved in the localization of proteins to specific sites within the cell, by interacting with proline-rich sequences within target proteins. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212764 [Multi-domain]  Cd Length: 54  Bit Score: 59.95  E-value: 1.75e-11
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|.
gi 221476505   9 AEYSFMGSNNDELCFQKGDVITV-TQREDGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd11830    4 ARYDFCARDMRELSLKEGDVVKIyNKKGQQGWWRGEINGRIGWFPSTYVEE 54
SH3_ephexin1_like cd11793
Src homology 3 domain of ephexin-1-like SH3 domain containing Rho guanine nucleotide exchange ...
7-58 1.94e-11

Src homology 3 domain of ephexin-1-like SH3 domain containing Rho guanine nucleotide exchange factors; Members of this family contain RhoGEF (also called Dbl-homologous or DH), Pleckstrin Homology (PH), and C-terminal SH3 domains. They include the Rho guanine nucleotide exchange factors ARHGEF5, ARHGEF16, ARHGEF19, ARHGEF26, ARHGEF27 (also called ephexin-1), and similar proteins, and are also called ephexins because they interact directly with ephrin A receptors. GEFs interact with Rho GTPases via their DH domains to catalyze nucleotide exchange by stabilizing the nucleotide-free GTPase intermediate. They play important roles in neuronal development. The SH3 domains of ARHGEFs play an autoinhibitory role through intramolecular interactions with a proline-rich region N-terminal to the DH domain. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212727 [Multi-domain]  Cd Length: 55  Bit Score: 60.04  E-value: 1.94e-11
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGT-LND-KTGWFPSNYVNE 58
Cdd:cd11793    2 VQCVHAYTAQQPDELTLEEGDVVNVLRKMPDGWYEGErLRDgERGWFPSSYTEE 55
SH3_STAM1 cd11964
Src homology 3 domain of Signal Transducing Adaptor Molecule 1; STAM1 is part of the endosomal ...
7-56 2.74e-11

Src homology 3 domain of Signal Transducing Adaptor Molecule 1; STAM1 is part of the endosomal sorting complex required for transport (ESCRT-0) and is involved in sorting ubiquitinated cargo proteins from the endosome. It may also be involved in the regulation of IL2 and GM-CSF mediated signaling, and has been implicated in neural cell survival. STAMs were discovered as proteins that are highly phosphorylated following cytokine and growth factor stimulation. They function in cytokine signaling and surface receptor degradation, as well as regulate Golgi morphology. They associate with many proteins including Jak2 and Jak3 tyrosine kinases, Hrs, AMSH, and UBPY. STAM adaptor proteins contain VHS (Vps27, Hrs, STAM homology), ubiquitin interacting (UIM), and SH3 domains. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212897 [Multi-domain]  Cd Length: 55  Bit Score: 59.58  E-value: 2.74e-11
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11964    3 VRAIYDFEAAEDNELTFKAGDIITILDDSDPNWWKGETPQGTGLFPSNFV 52
SH3_Intersectin2_3 cd11992
Third Src homology 3 domain (or SH3C) of Intersectin-2; Intersectin-2 (ITSN2) is an adaptor ...
9-56 3.11e-11

Third Src homology 3 domain (or SH3C) of Intersectin-2; Intersectin-2 (ITSN2) is an adaptor protein that functions in exo- and endocytosis, actin cytoskeletal reorganization, and signal transduction. It plays a role in clathrin-coated pit (CCP) formation. It binds to many proteins through its multidomain structure and facilitate the assembly of multimeric complexes. ITSN2 also functions as a specific GEF for Cdc42 activation in epithelial morphogenesis, and is required in mitotic spindle orientation. It exists in alternatively spliced short and long isoforms. The short isoform contains two Eps15 homology domains (EH1 and EH2), a coiled-coil region and five SH3 domains (SH3A-E), while the long isoform, in addition, contains RhoGEF (also called Dbl-homologous or DH), Pleckstrin homology (PH) and C2 domains. The third SH3 domain (SH3C) of ITSN2 has been shown to bind the K15 protein of Kaposi's sarcoma-associated herpesvirus. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212925  Cd Length: 52  Bit Score: 59.25  E-value: 3.11e-11
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*...
gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQReDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11992    4 ALYPYSSSEPGDLTFNEGEEILVTQK-DGEWWTGSIEDRTGIFPSNYV 50
SH3_Myosin-I_fungi cd11858
Src homology 3 domain of Type I fungal Myosins; Type I myosins (myosin-I) are actin-dependent ...
9-58 4.98e-11

Src homology 3 domain of Type I fungal Myosins; Type I myosins (myosin-I) are actin-dependent motors in endocytic actin structures and actin patches. They play roles in membrane traffic in endocytic and secretory pathways, cell motility, and mechanosensing. Saccharomyces cerevisiae has two myosins-I, Myo3 and Myo5, which are involved in endocytosis and the polarization of the actin cytoskeleton. Myosin-I contains an N-terminal actin-activated ATPase, a phospholipid-binding TH1 (tail homology 1) domain, and a C-terminal extension which includes an F-actin-binding TH2 domain, an SH3 domain, and an acidic peptide that participates in activating the Arp2/3complex. The SH3 domain of myosin-I is required for myosin-I-induced actin polymerization. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212792 [Multi-domain]  Cd Length: 55  Bit Score: 58.55  E-value: 4.98e-11
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|..
gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKT--GWFPSNYVNE 58
Cdd:cd11858    4 ALYDFAGSVANELSLKKDDIVYIVQKEDNGWWLAKKLDESkeGWVPAAYLEE 55
SH3_Eve1_4 cd11817
Fourth Src homology 3 domain of ADAM-binding protein Eve-1; Eve-1, also called SH3 ...
7-55 5.16e-11

Fourth Src homology 3 domain of ADAM-binding protein Eve-1; Eve-1, also called SH3 domain-containing protein 19 (SH3D19) or EEN-binding protein (EBP), exists in multiple alternatively spliced isoforms. The longest isoform contains five SH3 domain in the C-terminal region and seven proline-rich motifs in the N-terminal region. It is abundantly expressed in skeletal muscle and heart, and may be involved in regulating the activity of ADAMs (A disintegrin and metalloproteases). Eve-1 interacts with EEN, an endophilin involved in endocytosis and may be the target of the MLL-EEN fusion protein that is implicated in leukemogenesis. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212751 [Multi-domain]  Cd Length: 50  Bit Score: 58.64  E-value: 5.16e-11
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*....
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNY 55
Cdd:cd11817    2 AVALYDFTGETEEDLSFQRGDRILVTEHLDAEWSRGRLNGREGIFPRAF 50
SH3_FCHSD_2 cd11762
Second Src Homology 3 domain of FCH and double SH3 domains proteins; This group is composed of ...
7-58 5.30e-11

Second Src Homology 3 domain of FCH and double SH3 domains proteins; This group is composed of FCH and double SH3 domains protein 1 (FCHSD1) and FCHSD2. These proteins have a common domain structure consisting of an N-terminal F-BAR (FES-CIP4 Homology and Bin/Amphiphysin/Rvs), two SH3, and C-terminal proline-rich domains. They have only been characterized in silico and their functions remain unknown. This group also includes the insect protein, nervous wreck, which acts as a regulator of synaptic growth signaling. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212696 [Multi-domain]  Cd Length: 57  Bit Score: 58.56  E-value: 5.30e-11
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*.
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDG----GWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd11762    2 VRALYDYEAQSDEELSFPEGAIIRILRKDDNgvddGWWEGEFNGRVGVFPSLVVEE 57
SH3_SNX9_like cd11763
Src Homology 3 domain of Sorting Nexin 9 and similar proteins; Sorting nexins (SNXs) are Phox ...
7-56 5.45e-11

Src Homology 3 domain of Sorting Nexin 9 and similar proteins; Sorting nexins (SNXs) are Phox homology (PX) domain containing proteins that are involved in regulating membrane traffic and protein sorting in the endosomal system. SNXs differ from each other in their lipid-binding specificity, subcellular localization and specific function in the endocytic pathway. This subfamily consists of SH3 domain containing SNXs including SNX9, SNX18, SNX33, and similar proteins. SNX9 is localized to plasma membrane endocytic sites and acts primarily in clathrin-mediated endocytosis, while SNX18 is localized to peripheral endosomal structures, and acts in a trafficking pathway that is clathrin-independent but relies on AP-1 and PACS1. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212697 [Multi-domain]  Cd Length: 55  Bit Score: 58.49  E-value: 5.45e-11
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|..
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVT-QREDGGWWEG-TLNDKTGWFPSNYV 56
Cdd:cd11763    2 VRALYDFDSQPSGELSLRAGEVLTITrQDVGDGWLEGrNSRGEVGLFPSSYV 53
SH3_Nck1_2 cd11901
Second Src Homology 3 domain of Nck1 adaptor protein; Nck1 (also called Nckalpha) plays a ...
10-58 6.86e-11

Second Src Homology 3 domain of Nck1 adaptor protein; Nck1 (also called Nckalpha) plays a crucial role in connecting signaling pathways of tyrosine kinase receptors and important effectors in actin dynamics and cytoskeletal remodeling. It binds and activates RasGAP, resulting in the downregulation of Ras. It is also involved in the signaling of endothilin-mediated inhibition of cell migration. Nck adaptor proteins regulate actin cytoskeleton dynamics by linking proline-rich effector molecules to protein tyrosine kinases and phosphorylated signaling intermediates. They contain three SH3 domains and a C-terminal SH2 domain. They function downstream of the PDGFbeta receptor and are involved in Rho GTPase signaling and actin dynamics. Vertebrates contain two Nck adaptor proteins: Nck1 (also called Nckalpha) and Nck2, which show partly overlapping functions but also bind distinct targets. The second SH3 domain of Nck appears to prefer ligands containing the APxxPxR motif. SH3 domains are protein interaction domains that usually bind to proline-rich ligands with moderate affinity and selectivity, preferentially a PxxP motif. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212834 [Multi-domain]  Cd Length: 55  Bit Score: 58.51  E-value: 6.86e-11
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*....
gi 221476505  10 EYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd11901    7 KFNYTAEREDELSLVKGTKVIVMEKCSDGWWRGSYNGQVGWFPSNYVTE 55
SH3_p47phox_like cd11856
Src homology 3 domains of the p47phox subunit of NADPH oxidase and similar domains; This ...
11-55 1.01e-10

Src homology 3 domains of the p47phox subunit of NADPH oxidase and similar domains; This family is composed of the tandem SH3 domains of p47phox subunit of NADPH oxidase and Nox Organizing protein 1 (NoxO1), the four SH3 domains of Tks4 (Tyr kinase substrate with four SH3 domains), the five SH3 domains of Tks5, the SH3 domain of obscurin, Myosin-I, and similar domains. Most members of this group also contain Phox homology (PX) domains, except for obscurin and Myosin-I. p47phox and NoxO1 are regulators of the phagocytic NADPH oxidase complex (also called Nox2 or gp91phox) and nonphagocytic NADPH oxidase Nox1, respectively. They play roles in the activation of their respective NADPH oxidase, which catalyzes the transfer of electrons from NADPH to molecular oxygen to form superoxide. Tks proteins are Src substrates and scaffolding proteins that play important roles in the formation of podosomes and invadopodia, the dynamic actin-rich structures that are related to cell migration and cancer cell invasion. Obscurin is a giant muscle protein that plays important roles in the organization and assembly of the myofibril and the sarcoplasmic reticulum. Type I myosins (Myosin-I) are actin-dependent motors in endocytic actin structures and actin patches. They play roles in membrane traffic in endocytic and secretory pathways, cell motility, and mechanosensing. Myosin-I contains an N-terminal actin-activated ATPase, a phospholipid-binding TH1 (tail homology 1) domain, and a C-terminal extension which includes an F-actin-binding TH2 domain, an SH3 domain, and an acidic peptide that participates in activating the Arp2/3complex. The SH3 domain of myosin-I is required for myosin-I-induced actin polymerization. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212790 [Multi-domain]  Cd Length: 53  Bit Score: 57.65  E-value: 1.01e-10
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*
gi 221476505  11 YSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNY 55
Cdd:cd11856    6 ADYEAQGDDEISLQEGEVVEVLEKNDSGWWYVRKGDKEGWVPASY 50
SH3_VAV3_2 cd11978
C-terminal (or second) Src homology 3 domain of VAV3 protein; VAV3 is ubiquitously expressed ...
9-58 1.04e-10

C-terminal (or second) Src homology 3 domain of VAV3 protein; VAV3 is ubiquitously expressed and functions as a phosphorylation-dependent guanine nucleotide exchange factor (GEF) for RhoA, RhoG, and Rac1. It has been implicated to function in the hematopoietic, bone, cerebellar, and cardiovascular systems. VAV3 is essential in axon guidance in neurons that control blood pressure and respiration. It is overexpressed in prostate cancer cells and it plays a role in regulating androgen receptor transcriptional activity. VAV proteins contain several domains that enable their function: N-terminal calponin homology (CH), acidic, RhoGEF (also called Dbl-homologous or DH), Pleckstrin Homology (PH), C1 (zinc finger), SH2, and two SH3 domains. The SH3 domain of VAV is involved in the localization of proteins to specific sites within the cell, by interacting with proline-rich sequences within target proteins. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212911 [Multi-domain]  Cd Length: 56  Bit Score: 57.73  E-value: 1.04e-10
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|.
gi 221476505   9 AEYSFMGSNNDELCFQKGDVITV-TQREDGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd11978    5 ARYDFCARDMRELSLLKGDVVKIyTKMSTNGWWRGEVNGRVGWFPSTYVEE 55
SH3_Sorbs_2 cd11782
Second Src Homology 3 domain of Sorbin and SH3 domain containing (Sorbs) proteins and similar ...
9-56 1.23e-10

Second Src Homology 3 domain of Sorbin and SH3 domain containing (Sorbs) proteins and similar domains; This family, also called the vinexin family, is composed predominantly of adaptor proteins containing one sorbin homology (SoHo) and three SH3 domains. Members include the second SH3 domains of Sorbs1 (or ponsin), Sorbs2 (or ArgBP2), Vinexin (or Sorbs3), and similar domains. They are involved in the regulation of cytoskeletal organization, cell adhesion, and growth factor signaling. Members of this family bind multiple partners including signaling molecules like c-Abl, c-Arg, Sos, and c-Cbl, as well as cytoskeletal molecules such as vinculin and afadin. They may have overlapping functions. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212716 [Multi-domain]  Cd Length: 53  Bit Score: 57.36  E-value: 1.23e-10
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*...
gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11782    4 AKYNFNADTGVELSFRKGDVITLTRRVDENWYEGRIGGRQGIFPVSYV 51
SH3_GRB2_C cd11949
C-terminal Src homology 3 domain of Growth factor receptor-bound protein 2; GRB2 is a critical ...
7-56 1.32e-10

C-terminal Src homology 3 domain of Growth factor receptor-bound protein 2; GRB2 is a critical signaling molecule that regulates the Ras pathway by linking tyrosine kinases to the Ras guanine nucleotide releasing protein Sos (son of sevenless), which converts Ras to the active GTP-bound state. It is ubiquitously expressed in all tissues throughout development and is important in cell cycle progression, motility, morphogenesis, and angiogenesis. In lymphocytes, GRB2 is associated with antigen receptor signaling components. GRB2 contains an N-terminal SH3 domain, a central SH2 domain, and a C-terminal SH3 domain. The C-terminal SH3 domain of GRB2 binds to Gab2 (Grb2-associated binder 2) through epitopes containing RxxK motifs, as well as to the proline-rich C-terminus of FGRF2. SH3 domains are protein interaction domains that typically bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212882 [Multi-domain]  Cd Length: 53  Bit Score: 57.54  E-value: 1.32e-10
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11949    2 VQALFDFDPQEDGELGFRRGDFIEVMDNSDPNWWKGACHGQTGMFPRNYV 51
SH3_VAV1_2 cd11976
C-terminal (or second) Src homology 3 domain of VAV1 protein; VAV1 is expressed predominantly ...
6-58 1.43e-10

C-terminal (or second) Src homology 3 domain of VAV1 protein; VAV1 is expressed predominantly in the hematopoietic system and it plays an important role in the development and activation of B and T cells. It is activated by tyrosine phosphorylation to function as a guanine nucleotide exchange factor (GEF) for Rho GTPases following cell surface receptor activation, triggering various effects such as cytoskeletal reorganization, transcription regulation, cell cycle progression, and calcium mobilization. It also serves as a scaffold protein and has been shown to interact with Ku70, Socs1, Janus kinase 2, SIAH2, S100B, Abl gene, ZAP-70, SLP76, and Syk, among others. VAV proteins contain several domains that enable their function: N-terminal calponin homology (CH), acidic, RhoGEF (also called Dbl-homologous or DH), Pleckstrin Homology (PH), C1 (zinc finger), SH2, and two SH3 domains. The C-terminal SH3 domain of Vav1 interacts with a wide variety of proteins including cytoskeletal regulators (zyxin), RNA-binding proteins (Sam68), transcriptional regulators, viral proteins, and dynamin 2. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212909 [Multi-domain]  Cd Length: 54  Bit Score: 57.26  E-value: 1.43e-10
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITV-TQREDGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd11976    1 TAKARYDFCARDRSELSLKEGDIIKIlNKKGQQGWWRGEIYGRVGWFPANYVEE 54
SH3_Nck2_2 cd11902
Second Src Homology 3 domain of Nck2 adaptor protein; Nck2 (also called Nckbeta or Growth ...
4-58 1.55e-10

Second Src Homology 3 domain of Nck2 adaptor protein; Nck2 (also called Nckbeta or Growth factor receptor-bound protein 4, Grb4) plays a crucial role in connecting signaling pathways of tyrosine kinase receptors and important effectors in actin dynamics and cytoskeletal remodeling. It binds neuronal signaling proteins such as ephrinB and Disabled-1 (Dab-1) exclusively. Nck adaptor proteins regulate actin cytoskeleton dynamics by linking proline-rich effector molecules to protein tyrosine kinases and phosphorylated signaling intermediates. They contain three SH3 domains and a C-terminal SH2 domain. They function downstream of the PDGFbeta receptor and are involved in Rho GTPase signaling and actin dynamics. Vertebrates contain two Nck adaptor proteins: Nck1 (also called Nckalpha) and Nck2, which show partly overlapping functions but also bind distinct targets. The second SH3 domain of Nck appears to prefer ligands containing the APxxPxR motif. SH3 domains are protein interaction domains that usually bind to proline-rich ligands with moderate affinity and selectivity, preferentially a PxxP motif. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212835 [Multi-domain]  Cd Length: 55  Bit Score: 57.32  E-value: 1.55e-10
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*
gi 221476505   4 PLVVQaeYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd11902    2 PAFVK--FAYVAEREDELSLVKGSRVTVMEKCSDGWWRGSYNGQIGWFPSNYVVE 54
SH3_GRAP2_C cd11950
C-terminal Src homology 3 domain of GRB2-related adaptor protein 2; GRAP2 is also called GADS ...
7-56 1.62e-10

C-terminal Src homology 3 domain of GRB2-related adaptor protein 2; GRAP2 is also called GADS (GRB2-related adapter downstream of Shc), GrpL, GRB2L, Mona, or GRID (Grb2-related protein with insert domain). It is expressed specifically in the hematopoietic system. It plays an important role in T cell receptor (TCR) signaling by promoting the formation of the SLP-76:LAT complex, which couples the TCR to the Ras pathway. It also has roles in antigen-receptor and tyrosine kinase mediated signaling. GRAP2 is unique from other GRB2-like adaptor proteins in that it can be regulated by caspase cleavage. It contains an N-terminal SH3 domain, a central SH2 domain, and a C-terminal SH3 domain. The C-terminal SH3 domain of GRAP2 binds to different motifs found in substrate peptides including the typical PxxP motif in hematopoietic progenitor kinase 1 (HPK1), the RxxK motif in SLP-76 and HPK1, and the RxxxxK motif in phosphatase-like protein HD-PTP. SH3 domains are protein interaction domains that typically bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212883 [Multi-domain]  Cd Length: 53  Bit Score: 57.14  E-value: 1.62e-10
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11950    2 VRALYDFEALEDDELGFNSGDVIEVLDSSNPSWWKGRLHGKLGLFPANYV 51
SH3_STAM cd11820
Src homology 3 domain of Signal Transducing Adaptor Molecules; STAMs were discovered as ...
7-56 1.84e-10

Src homology 3 domain of Signal Transducing Adaptor Molecules; STAMs were discovered as proteins that are highly phosphorylated following cytokine and growth factor stimulation. They function in cytokine signaling and surface receptor degradation, as well as regulate Golgi morphology. They associate with many proteins including Jak2 and Jak3 tyrosine kinases, Hrs, AMSH, and UBPY. STAM adaptor proteins contain VHS (Vps27, Hrs, STAM homology), ubiquitin interacting (UIM), and SH3 domains. There are two vertebrate STAMs, STAM1 and STAM2, which may be functionally redundant; vertebrate STAMs contain ITAM motifs. They are part of the endosomal sorting complex required for transport (ESCRT-0). STAM2 deficiency in mice did not cause any obvious abnormality, while STAM1 deficiency resulted in growth retardation. Loss of both STAM1 and STAM2 in mice proved lethal, indicating that STAMs are important for embryonic development. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212754 [Multi-domain]  Cd Length: 54  Bit Score: 57.09  E-value: 1.84e-10
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11820    3 VRALYDFEAAEDNELTFKAGEIITVLDDSDPNWWKGSNHRGEGLFPANFV 52
SH3_CD2AP_3 cd12056
Third Src Homology 3 domain (SH3C) of CD2-associated protein; CD2AP, also called CMS (Cas ...
8-56 2.78e-10

Third Src Homology 3 domain (SH3C) of CD2-associated protein; CD2AP, also called CMS (Cas ligand with Multiple SH3 domains) or METS1 (Mesenchyme-to-Epithelium Transition protein with SH3 domains), is a cytosolic adaptor protein that plays a role in regulating the cytoskeleton. It is critical in cell-to-cell union necessary for kidney function. It also stabilizes the contact between a T cell and antigen-presenting cells. It is primarily expressed in podocytes at the cytoplasmic face of the slit diaphragm and serves as a linker anchoring podocin and nephrin to the actin cytoskeleton. CD2AP contains three SH3 domains, a proline-rich region, and a C-terminal coiled-coil domain. All of these domains enable CD2AP to bind various protein partners and assemble complexes that have been implicated in many different functions. This alignment model represents the third SH3 domain (SH3C) of CD2AP. SH3C has been shown to bind ubiquitin. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212989 [Multi-domain]  Cd Length: 57  Bit Score: 56.76  E-value: 2.78e-10
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|.
gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQREDG--GWWEGTLNDKTGWFPSNYV 56
Cdd:cd12056    5 KALFHYEGTNEDELDFKEGEIILIISKDTGepGWWKGELNGKEGVFPDNFV 55
SH3_Abi2 cd11972
Src homology 3 domain of Abl Interactor 2; Abi2 is highly expressed in the brain and eye. It ...
7-56 3.54e-10

Src homology 3 domain of Abl Interactor 2; Abi2 is highly expressed in the brain and eye. It regulates actin cytoskeletal reorganization at adherens junctions and dendritic spines, which is important in cell morphogenesis, migration, and cognitive function. Mice deficient with Abi2 show defects in orientation and migration of lens fibers, neuronal migration, dendritic spine morphology, as well as deficits in learning and memory. Abi proteins are adaptor proteins serving as binding partners and substrates of Abl tyrosine kinases. They are involved in regulating actin cytoskeletal reorganization and play important roles in membrane-ruffling, endocytosis, cell motility, and cell migration. Abi proteins contain a homeobox homology domain, a proline-rich region, and a SH3 domain. The SH3 domain of Abi binds to a PxxP motif in Abl. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212905 [Multi-domain]  Cd Length: 61  Bit Score: 56.56  E-value: 3.54e-10
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11972    5 VVAIYDYTKDKEDELSFQEGAIIYVIKKNDDGWYEGVMNGVTGLFPGNYV 54
SH3_ARHGEF9_like cd11828
Src homology 3 domain of ARHGEF9-like Rho guanine nucleotide exchange factors; Members of this ...
18-56 4.77e-10

Src homology 3 domain of ARHGEF9-like Rho guanine nucleotide exchange factors; Members of this family contain a SH3 domain followed by RhoGEF (also called Dbl-homologous or DH) and Pleckstrin Homology (PH) domains. They include the Rho guanine nucleotide exchange factors ARHGEF9, ASEF (also called ARHGEF4), ASEF2, and similar proteins. GEFs activate small GTPases by exchanging bound GDP for free GTP. ARHGEF9 specifically activates Cdc42, while both ASEF and ASEF2 can activate Rac1 and Cdc42. ARHGEF9 is highly expressed in the brain and it interacts with gephyrin, a postsynaptic protein associated with GABA and glycine receptors. ASEF plays a role in angiogenesis and cell migration. ASEF2 is important in cell migration and adhesion dynamics. ASEF exists in an autoinhibited form and is activated upon binding of the tumor suppressor APC (adenomatous polyposis coli), leading to the activation of Rac1 or Cdc42. In its autoinhibited form, the SH3 domain of ASEF forms an extensive interface with the DH and PH domains, blocking the Rac binding site. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212762 [Multi-domain]  Cd Length: 53  Bit Score: 55.85  E-value: 4.77e-10
                         10        20        30
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gi 221476505  18 NDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11828   13 PEELGFKAGDVIEVLDMSDKDWWWGSIRDEEGWFPASFV 51
PH smart00233
Pleckstrin homology domain; Domain commonly found in eukaryotic signalling proteins. The ...
294-372 5.93e-10

Pleckstrin homology domain; Domain commonly found in eukaryotic signalling proteins. The domain family possesses multiple functions including the abilities to bind inositol phosphates, and various proteins. PH domains have been found to possess inserted domains (such as in PLC gamma, syntrophins) and to be inserted within other domains. Mutations in Brutons tyrosine kinase (Btk) within its PH domain cause X-linked agammaglobulinaemia (XLA) in patients. Point mutations cluster into the positively charged end of the molecule around the predicted binding site for phosphatidylinositol lipids.


Pssm-ID: 214574 [Multi-domain]  Cd Length: 102  Bit Score: 57.17  E-value: 5.93e-10
                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 221476505   294 RDRYFVLFPQTLLFLSVSQRMSAFIYEGKLPLTGIIVNRLEDTDAL--KNAFEISSPLIDRIVAVCQGPNEANKWVELLN 371
Cdd:smart00233  19 KKRYFVLFNSTLLYYKSKKDKKSYKPKGSIDLSGCTVREAPDPDSSkkPHCFEIKTSDRKTLLLQAESEEEREKWVEALR 98

                   .
gi 221476505   372 A 372
Cdd:smart00233  99 K 99
SH3_srGAP cd11809
Src homology 3 domain of Slit-Robo GTPase Activating Proteins; Slit-Robo GTPase Activating ...
9-57 6.13e-10

Src homology 3 domain of Slit-Robo GTPase Activating Proteins; Slit-Robo GTPase Activating Proteins (srGAPs) are Rho GAPs that interact with Robo1, the transmembrane receptor of Slit proteins. Slit proteins are secreted proteins that control axon guidance and the migration of neurons and leukocytes. Vertebrates contain three isoforms of srGAPs (srGAP1-3), all of which are expressed during embryonic and early development in the nervous system but with different localization and timing. A fourth member has also been reported (srGAP4, also called ARHGAP4). srGAPs contain an N-terminal F-BAR domain, a Rho GAP domain, and a C-terminal SH3 domain. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212743 [Multi-domain]  Cd Length: 53  Bit Score: 55.49  E-value: 6.13e-10
                         10        20        30        40
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gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVN 57
Cdd:cd11809    4 AQFDYTGRSERELSFKKGDSLTLYRQVSDDWWRGQLNGQDGLVPHKYIT 52
SH3_PLCgamma1 cd11970
Src homology 3 domain of Phospholipase C (PLC) gamma 1; PLCgamma1 is widely expressed and is ...
7-58 9.39e-10

Src homology 3 domain of Phospholipase C (PLC) gamma 1; PLCgamma1 is widely expressed and is essential in growth and development. It is activated by the TrkA receptor tyrosine kinase and functions as a key regulator of cell differentiation. It is also the predominant PLCgamma in T cells and is required for T cell and NK cell function. PLCs catalyze the hydrolysis of phosphatidylinositol (4,5)-bisphosphate [PtdIns(4,5)P2] to produce Ins(1,4,5)P3 and diacylglycerol (DAG). Ins(1,4,5)P3 initiates the calcium signaling cascade while DAG functions as an activator of PKC. PLCgamma contains a Pleckstrin homology (PH) domain followed by an elongation factor (EF) domain, two catalytic regions of PLC domains that flank two tandem SH2 domains, followed by a SH3 domain and C2 domain. The SH3 domain of PLCgamma1 directly interacts with dynamin-1 and can serve as a guanine nucleotide exchange factor (GEF). It also interacts with Cbl, inhibiting its phosphorylation and activity. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212903  Cd Length: 60  Bit Score: 55.38  E-value: 9.39e-10
                         10        20        30        40        50
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gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTG-WFPSNYVNE 58
Cdd:cd11970    6 VKALFDYKAQREDELTFTKNAIIQNVEKQEGGWWRGDYGGKKQlWFPSNYVEE 58
SH3_p67phox_C cd12046
C-terminal (or second) Src Homology 3 domain of the p67phox subunit of NADPH oxidase; p67phox, ...
7-58 9.46e-10

C-terminal (or second) Src Homology 3 domain of the p67phox subunit of NADPH oxidase; p67phox, also called Neutrophil cytosol factor 2 (NCF-2), is a cytosolic subunit of the phagocytic NADPH oxidase complex (also called Nox2 or gp91phox) which plays a crucial role in the cellular response to bacterial infection. NADPH oxidase catalyzes the transfer of electrons from NADPH to oxygen during phagocytosis forming superoxide and reactive oxygen species. p67phox plays a regulatory role and contains N-terminal TPR, first SH3 (or N-terminal or central SH3), PB1, and C-terminal SH3 domains. It binds, via its C-terminal SH3 domain, to a proline-rich region of p47phox and upon activation, this complex assembles with flavocytochrome b558, the Nox2-p22phox heterodimer. Concurrently, RacGTP translocates to the membrane and interacts with the TPR domain of p67phox, which leads to the activation of NADPH oxidase. The PB1 domain of p67phox binds to its partner PB1 domain in p40phox, and this facilitates the assembly of p47phox-p67phox at the membrane. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212979 [Multi-domain]  Cd Length: 53  Bit Score: 55.19  E-value: 9.46e-10
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|..
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd12046    2 VVALFSYEASQPEDLEFQKGDVILVLSKVNEDWLEGQCKGKIGIFPSAFVED 53
SH3_VAV2_2 cd11977
C-terminal (or second) Src homology 3 domain of VAV2 protein; VAV2 is widely expressed and ...
9-58 1.13e-09

C-terminal (or second) Src homology 3 domain of VAV2 protein; VAV2 is widely expressed and functions as a guanine nucleotide exchange factor (GEF) for RhoA, RhoB and RhoG and also activates Rac1 and Cdc42. It is implicated in many cellular and physiological functions including blood pressure control, eye development, neurite outgrowth and branching, EGFR endocytosis and degradation, and cell cluster morphology, among others. It has been reported to associate with Nek3. VAV proteins contain several domains that enable their function: N-terminal calponin homology (CH), acidic, RhoGEF (also called Dbl-homologous or DH), Pleckstrin Homology (PH), C1 (zinc finger), SH2, and two SH3 domains. The SH3 domain of VAV is involved in the localization of proteins to specific sites within the cell, by interacting with proline-rich sequences within target proteins. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212910 [Multi-domain]  Cd Length: 58  Bit Score: 55.02  E-value: 1.13e-09
                         10        20        30        40        50
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gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQR--EDGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd11977    5 ARYNFAARDMRELSLREGDVVRIYSRigGDQGWWKGETNGRIGWFPSTYVEE 56
SH3_CIN85_3 cd12057
Third Src Homology 3 domain (SH3C) of Cbl-interacting protein of 85 kDa; CIN85, also called ...
11-56 1.15e-09

Third Src Homology 3 domain (SH3C) of Cbl-interacting protein of 85 kDa; CIN85, also called SH3 domain-containing kinase-binding protein 1 (SH3KBP1) or CD2-binding protein 3 (CD2BP3) or Ruk, is an adaptor protein that is involved in the downregulation of receptor tyrosine kinases by facilitating endocytosis through interaction with endophilin-associated ubiquitin ligase Cbl proteins. It is also important in many other cellular processes including vesicle-mediated transport, cytoskeletal remodelling, apoptosis, cell adhesion and migration, and viral infection, among others. CIN85 exists as multiple variants from alternative splicing; the main variant contains three SH3 domains, a proline-rich region, and a C-terminal coiled-coil domain. All of these domains enable CIN85 to bind various protein partners and assemble complexes that have been implicated in many different functions. This alignment model represents the third SH3 domain (SH3C) of CIN85. SH3C has been shown to bind ubiquitin. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212990 [Multi-domain]  Cd Length: 56  Bit Score: 54.90  E-value: 1.15e-09
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*...
gi 221476505  11 YSFMGSNNDELCFQKGDVITVTQRE--DGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd12057    6 FPYEAQNEDELTIKEGDIVTLISKDciDAGWWEGELNGRRGVFPDNFV 53
SH3_PACSIN cd11843
Src homology 3 domain of Protein kinase C and Casein kinase Substrate in Neurons (PACSIN) ...
7-56 1.17e-09

Src homology 3 domain of Protein kinase C and Casein kinase Substrate in Neurons (PACSIN) proteins; PACSINs, also called Synaptic dynamin-associated proteins (Syndapins), act as regulators of cytoskeletal and membrane dynamics. They bind both dynamin and Wiskott-Aldrich syndrome protein (WASP), and may provide direct links between the actin cytoskeletal machinery through WASP and dynamin-dependent endocytosis. Vetebrates harbor three isoforms with distinct expression patterns and specific functions. PACSINs contain an N-terminal F-BAR domain and a C-terminal SH3 domain. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212777 [Multi-domain]  Cd Length: 53  Bit Score: 54.73  E-value: 1.17e-09
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|.
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDG-GWWEGTLNDKTGWFPSNYV 56
Cdd:cd11843    2 VRALYDYEGQESDELSFKAGDILTKLEEEDEqGWCKGRLDGRVGLYPANYV 52
SH3_Bbc1 cd11887
Src Homology 3 domain of Bbc1 and similar domains; This subfamily is composed of Saccharomyces ...
4-56 1.19e-09

Src Homology 3 domain of Bbc1 and similar domains; This subfamily is composed of Saccharomyces cerevisiae Bbc1p, also called Mti1p (Myosin tail region-interacting protein), and similar proteins. Bbc1p interacts with and regulates type I myosins in yeast, Myo3p and Myo5p, which are involved in actin cytoskeletal reorganization. It also binds and inhibits Las17, a WASp family protein that functions as an activator of the Arp2/3 complex. Bbc1p contains an N-terminal SH3 domain. SH3 domains bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs; they play a role in the regulation of enzymes by intramolecular interactions, changing the subcellular localization of signal pathway components and mediate multiprotein complex assemblies.


Pssm-ID: 212820 [Multi-domain]  Cd Length: 60  Bit Score: 55.04  E-value: 1.19e-09
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*...
gi 221476505   4 PLVVQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLND-----KTGWFPSNYV 56
Cdd:cd11887    1 PFKVKALYPYESDHEDDLNFDVGQLITVTEEEDADWYFGEYVDsngntKEGIFPKNFV 58
SH3_SH3RF_1 cd11786
First Src Homology 3 domain of SH3 domain containing ring finger proteins; This model ...
8-56 1.19e-09

First Src Homology 3 domain of SH3 domain containing ring finger proteins; This model represents the first SH3 domain of SH3RF1 (or POSH), SH3RF2 (or POSHER), SH3RF3 (POSH2), and similar domains. Members of this family are scaffold proteins that function as E3 ubiquitin-protein ligases. They all contain an N-terminal RING finger domain and multiple SH3 domains; SH3RF1 and SH3RF3 have four SH3 domains while SH3RF2 has three. SH3RF1 plays a role in calcium homeostasis through the control of the ubiquitin domain protein Herp. It may also have a role in regulating death receptor mediated and JNK mediated apoptosis. SH3RF3 interacts with p21-activated kinase 2 (PAK2) and GTP-loaded Rac1. It may play a role in regulating JNK mediated apoptosis in certain conditions. SH3RF2 acts as an anti-apoptotic regulator of the JNK pathway by binding to and promoting the degradation of SH3RF1. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212720 [Multi-domain]  Cd Length: 53  Bit Score: 54.68  E-value: 1.19e-09
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*....
gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11786    3 KALYNYEGKEPGDLSFKKGDIILLRKRIDENWYHGECNGKQGFFPASYV 51
SH3_Sorbs_1 cd11781
First Src Homology 3 domain of Sorbin and SH3 domain containing (Sorbs) proteins and similar ...
9-56 1.27e-09

First Src Homology 3 domain of Sorbin and SH3 domain containing (Sorbs) proteins and similar domains; This family, also called the vinexin family, is composed predominantly of adaptor proteins containing one sorbin homology (SoHo) and three SH3 domains. Members include the first SH3 domains of Sorbs1 (or ponsin), Sorbs2 (or ArgBP2), Vinexin (or Sorbs3), and similar domains. They are involved in the regulation of cytoskeletal organization, cell adhesion, and growth factor signaling. Members of this family bind multiple partners including signaling molecules like c-Abl, c-Arg, Sos, and c-Cbl, as well as cytoskeletal molecules such as vinculin and afadin. They may have overlapping functions. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212715 [Multi-domain]  Cd Length: 53  Bit Score: 54.65  E-value: 1.27e-09
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                 ....*....|....*....|....*....|....*....|....*...
gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11781    4 ALYPFKAQSAKELSLKKGDIIYIRRQIDKNWYEGEHNGRVGIFPASYV 51
SH3_HS1 cd12073
Src homology 3 domain of Hematopoietic lineage cell-specific protein 1; HS1, also called HCLS1 ...
9-56 1.43e-09

Src homology 3 domain of Hematopoietic lineage cell-specific protein 1; HS1, also called HCLS1 (hematopoietic cell-specific Lyn substrate 1), is a cortactin homolog expressed specifically in hematopoietic cells. It is an actin regulatory protein that binds the Arp2/3 complex and stabilizes branched actin filaments. It is required for cell spreading and signaling in lymphocytes. It regulates cytoskeletal remodeling that controls lymphocyte trafficking, and it also affects tissue invasion and infiltration of leukemic B cells. Like cortactin, HS1 contains an N-terminal acidic domain, several copies of a repeat domain found in cortactin and HS1, a proline-rich region, and a C-terminal SH3 domain. The N-terminal region binds the Arp2/3 complex and F-actin, while the C-terminal region acts as an adaptor or scaffold that can connect varied proteins that bind the SH3 domain within the actin network. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 213006 [Multi-domain]  Cd Length: 55  Bit Score: 54.45  E-value: 1.43e-09
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*...
gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd12073    5 ALYDYQGEGDDEISFDPQETITDIEMVDEGWWKGTCHGHRGLFPANYV 52
SH3_Nebulin_family_C cd11789
C-terminal Src Homology 3 domain of the Nebulin family of proteins; Nebulin family proteins ...
9-56 1.50e-09

C-terminal Src Homology 3 domain of the Nebulin family of proteins; Nebulin family proteins contain multiple nebulin repeats, and may contain an N-terminal LIM domain and/or a C-terminal SH3 domain. They have molecular weights ranging from 34 to 900 kD, depending on the number of nebulin repeats, and they all bind actin. They are involved in the regulation of actin filament architecture and function as stabilizers and scaffolds for cytoskeletal structures with which they associate, such as long actin filaments or focal adhesions. Nebulin family proteins that contain a C-terminal SH3 domain include the giant filamentous protein nebulin, nebulette, Lasp1, and Lasp2. Lasp2, also called LIM-nebulette, is an alternatively spliced variant of nebulette. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212723 [Multi-domain]  Cd Length: 55  Bit Score: 54.63  E-value: 1.50e-09
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|
gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTL--NDKTGWFPSNYV 56
Cdd:cd11789    4 AMYDYAAADDDEVSFQEGDVIINVEIIDDGWMEGTVqrTGQSGMLPANYV 53
SH3_Cortactin_like cd11819
Src homology 3 domain of Cortactin and related proteins; This subfamily includes cortactin, ...
9-56 2.27e-09

Src homology 3 domain of Cortactin and related proteins; This subfamily includes cortactin, Abp1 (actin-binding protein 1), hematopoietic lineage cell-specific protein 1 (HS1), and similar proteins. These proteins are involved in regulating actin dynamics through direct or indirect interaction with the Arp2/3 complex, which is required to initiate actin polymerization. They all contain at least one C-terminal SH3 domain. Cortactin and HS1 bind Arp2/3 and actin through an N-terminal region that contains an acidic domain and several copies of a repeat domain found in cortactin and HS1. Abp1 binds actin via an N-terminal actin-depolymerizing factor (ADF) homology domain. Yeast Abp1 binds Arp2/3 directly through two acidic domains. Mammalian Abp1 does not directly interact with Arp2/3; instead, it regulates actin dynamics indirectly by interacting with dynamin and WASP family proteins. The C-terminal region of these proteins acts as an adaptor or scaffold that can connect membrane trafficking and signaling proteins that bind the SH3 domain within the actin network. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212753 [Multi-domain]  Cd Length: 54  Bit Score: 53.86  E-value: 2.27e-09
                         10        20        30        40
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gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLND-KTGWFPSNYV 56
Cdd:cd11819    4 ALYDYQAAEDNEISFVEGDIITQIEQIDEGWWLGVNAKgQKGLFPANYV 52
SH3_Intersectin_4 cd11839
Fourth Src homology 3 domain (or SH3D) of Intersectin; Intersectins (ITSNs) are adaptor ...
12-56 2.33e-09

Fourth Src homology 3 domain (or SH3D) of Intersectin; Intersectins (ITSNs) are adaptor proteins that function in exo- and endocytosis, actin cytoskeletal reorganization, and signal transduction. They are essential for initiating clathrin-coated pit formation. They bind to many proteins through their multidomain structure and facilitate the assembly of multimeric complexes. Vertebrates contain two ITSN proteins, ITSN1 and ITSN2, which exist in alternatively spliced short and long isoforms. The short isoforms contain two Eps15 homology domains (EH1 and EH2), a coiled-coil region and five SH3 domains (SH3A-E), while the long isoforms, in addition, contain RhoGEF (also called Dbl-homologous or DH), Pleckstrin homology (PH) and C2 domains. ITSN1 and ITSN2 are both widely expressed, with variations depending on tissue type and stage of development. The fourth SH3 domain (or SH3D) of ITSN1 has been shown to bind SHIP2, Numb, CdGAP, and N-WASP. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212773 [Multi-domain]  Cd Length: 58  Bit Score: 54.27  E-value: 2.33e-09
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gi 221476505  12 SFMGSNNDELCFQKGDVITVTQREDGGWWEGTL-----NDKTGWFPSNYV 56
Cdd:cd11839    7 PFTATAENQLSLAVGQLVLVRKKSPSGWWEGELqargkKRQIGWFPANYV 56
SH3_Cortactin cd11959
Src homology 3 domain of Cortactin; Cortactin was originally identified as a substrate of Src ...
9-56 2.48e-09

Src homology 3 domain of Cortactin; Cortactin was originally identified as a substrate of Src kinase. It is an actin regulatory protein that binds to the Arp2/3 complex and stabilizes branched actin filaments. It is involved in cellular processes that affect cell motility, adhesion, migration, endocytosis, and invasion. It is expressed ubiquitously except in hematopoietic cells, where the homolog hematopoietic lineage cell-specific 1 (HS1) is expressed instead. Cortactin contains an N-terminal acidic domain, several copies of a repeat domain found in cortactin and HS1, a proline-rich region, and a C-terminal SH3 domain. The N-terminal region interacts with the Arp2/3 complex and F-actin, and is crucial in regulating branched actin assembly. Cortactin also serves as a scaffold and provides a bridge to the actin cytoskeleton for membrane trafficking and signaling proteins that bind to its SH3 domain. Binding partners for the SH3 domain of cortactin include dynamin2, N-WASp, MIM, FGD1, among others. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212892 [Multi-domain]  Cd Length: 53  Bit Score: 53.96  E-value: 2.48e-09
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gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11959    4 ALYDYQAADDDEISFDPDDIITNIEMIDEGWWRGVCRGKYGLFPANYV 51
SH3_ASPP2 cd11953
Src Homology 3 (SH3) domain of Apoptosis Stimulating of p53 protein 2; ASPP2 is the full ...
6-54 3.44e-09

Src Homology 3 (SH3) domain of Apoptosis Stimulating of p53 protein 2; ASPP2 is the full length form of the previously-identified tumor supressor, p53-binding protein 2 (p53BP2). ASPP2 activates the apoptotic function of the p53 family of tumor suppressors (p53, p63, and p73). It plays a central role in regulating apoptosis and cell growth; ASPP2-deficient mice show postnatal death. Downregulated expression of ASPP2 is frequently found in breast tumors, lung cancer, and diffuse large B-cell lymphoma where it is correlated with a poor clinical outcome. ASPP2 contains a proline-rich region, four ankyrin (ANK) repeats, and an SH3 domain at its C-terminal half. The SH3 domain and the ANK repeats of ASPP2 contribute to the p53 binding site; they bind to the DNA binding domain of p53. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212886 [Multi-domain]  Cd Length: 57  Bit Score: 53.80  E-value: 3.44e-09
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gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQREDGG---WWEGTLNDKTGWFPSN 54
Cdd:cd11953    2 VVYALWDYEGESDDELSFKEGDCMTILRREDEDeteWWWARLNDKEGYVPRN 53
SH3_ASPP1 cd11954
Src Homology 3 domain of Apoptosis Stimulating of p53 protein 1; ASPP1, like ASPP2, activates ...
6-54 3.58e-09

Src Homology 3 domain of Apoptosis Stimulating of p53 protein 1; ASPP1, like ASPP2, activates the apoptotic function of the p53 family of tumor suppressors (p53, p63, and p73). In addition, it functions in the cytoplasm to regulate the nuclear localization of the transcriptional cofactors YAP and TAZ by inihibiting their phosphorylation; YAP and TAZ are important regulators of cell expansion, differentiation, migration, and invasion. ASPP1 is downregulated in breast tumors expressing wild-type p53. It contains a proline-rich region, four ankyrin (ANK) repeats, and an SH3 domain at its C-terminal half. The SH3 domain and the ANK repeats of ASPP1 contribute to the p53 binding site; they bind to the DNA binding domain of p53. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212887 [Multi-domain]  Cd Length: 57  Bit Score: 53.49  E-value: 3.58e-09
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gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQREDGG---WWEGTLNDKTGWFPSN 54
Cdd:cd11954    2 MVYALWDYEAQNADELSFQEGDAITILRRKDDSeteWWWARLNDKEGYVPKN 53
SH3_Eve1_5 cd11818
Fifth Src homology 3 domain of ADAM-binding protein Eve-1; Eve-1, also called SH3 ...
8-55 3.59e-09

Fifth Src homology 3 domain of ADAM-binding protein Eve-1; Eve-1, also called SH3 domain-containing protein 19 (SH3D19) or EEN-binding protein (EBP), exists in multiple alternatively spliced isoforms. The longest isoform contains five SH3 domain in the C-terminal region and seven proline-rich motifs in the N-terminal region. It is abundantly expressed in skeletal muscle and heart, and may be involved in regulating the activity of ADAMs (A disintegrin and metalloproteases). Eve-1 interacts with EEN, an endophilin involved in endocytosis and may be the target of the MLL-EEN fusion protein that is implicated in leukemogenesis. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212752 [Multi-domain]  Cd Length: 50  Bit Score: 53.26  E-value: 3.59e-09
                         10        20        30        40
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gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNY 55
Cdd:cd11818    3 RALYDFTGENEDELSFKAGDIITELESIDEEWMSGELRGKSGIFPKNF 50
SH3_Intersectin1_1 cd11987
First Src homology 3 domain (or SH3A) of Intersectin-1; Intersectin-1 (ITSN1) is an adaptor ...
8-55 3.70e-09

First Src homology 3 domain (or SH3A) of Intersectin-1; Intersectin-1 (ITSN1) is an adaptor protein that functions in exo- and endocytosis, actin cytoskeletal reorganization, and signal transduction. It plays a role in clathrin-coated pit (CCP) formation. It binds to many proteins through its multidomain structure and facilitate the assembly of multimeric complexes. ITSN1 localizes in membranous organelles, CCPs, the Golgi complex, and may be involved in the cell membrane trafficking system. It exists in alternatively spliced short and long isoforms. The short isoform contains two Eps15 homology domains (EH1 and EH2), a coiled-coil region and five SH3 domains (SH3A-E), while the long isoform, in addition, contains RhoGEF (also called Dbl-homologous or DH), Pleckstrin homology (PH) and C2 domains. The first SH3 domain (or SH3A) of ITSN1 has been shown to bind many proteins including Sos1, dynamin1/2, CIN85, c-Cbl, PI3K-C2, SHIP2, N-WASP, and CdGAP, among others. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212920 [Multi-domain]  Cd Length: 55  Bit Score: 53.46  E-value: 3.70e-09
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gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQREDG--GWWEGTLNDKTGWFPSNY 55
Cdd:cd11987    3 RALYPFEARSHDEITIQPGDIVMVDESQTGepGWLGGELKGKTGWFPANY 52
SH3_MLK1-3 cd12059
Src Homology 3 domain of Mixed Lineage Kinases 1, 2, and 3; MLKs 1, 2, and 3 are Serine ...
9-56 4.30e-09

Src Homology 3 domain of Mixed Lineage Kinases 1, 2, and 3; MLKs 1, 2, and 3 are Serine/Threonine Kinases (STKs), catalyzing the transfer of the gamma-phosphoryl group from ATP to S/T residues on protein substrates. MLKs act as mitogen-activated protein kinase kinase kinases (MAP3Ks, MKKKs, MAPKKKs), which phosphorylate and activate MAPK kinases (MAPKKs or MKKs or MAP2Ks), which in turn phosphorylate and activate MAPKs during signaling cascades that are important in mediating cellular responses to extracellular signals. MLKs play roles in immunity and inflammation, as well as in cell death, proliferation, and cell cycle regulation. Little is known about the specific function of MLK1, also called MAP3K9. It is capable of activating the c-Jun N-terminal kinase pathway. Mice lacking both MLK1 and MLK2 are viable, fertile, and have normal life spans. MLK2, also called MAP3K10, is abundant in brain, skeletal muscle, and testis. It functions upstream of the MAPK, c-Jun N-terminal kinase. It binds hippocalcin, a calcium-sensor protein that protects neurons against calcium-induced cell death. Both MLK2 and hippocalcin may be associated with the pathogenesis of Parkinson's disease. MLK3, also called MAP3K11, is highly expressed in breast cancer cells and its signaling through c-Jun N-terminal kinase has been implicated in the migration, invasion, and malignancy of cancer cells. It also functions as a negative regulator of Inhibitor of Nuclear Factor-KappaB Kinase (IKK) and thus, impacts inflammation and immunity. MLKs contain an SH3 domain, a catalytic kinase domain, a leucine zipper, a proline-rich region, and a CRIB domain that mediates binding to GTP-bound Cdc42 and Rac. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212992 [Multi-domain]  Cd Length: 58  Bit Score: 53.23  E-value: 4.30e-09
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gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQRE-----DGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd12059    4 AVFDYEASAEDELTLRRGDRVEVLSKDsavsgDEGWWTGKINDRVGIFPSNYV 56
SH3_STAM2 cd11963
Src homology 3 domain of Signal Transducing Adaptor Molecule 2; STAM2, also called EAST ...
7-56 5.52e-09

Src homology 3 domain of Signal Transducing Adaptor Molecule 2; STAM2, also called EAST (Epidermal growth factor receptor-associated protein with SH3 and TAM domain) or Hbp (Hrs binding protein), is part of the endosomal sorting complex required for transport (ESCRT-0). It plays a role in sorting mono-ubiquinated endosomal cargo for trafficking to the lysosome for degradation. It is also involved in the regulation of exocytosis. STAMs were discovered as proteins that are highly phosphorylated following cytokine and growth factor stimulation. They function in cytokine signaling and surface receptor degradation, as well as regulate Golgi morphology. They associate with many proteins including Jak2 and Jak3 tyrosine kinases, Hrs, AMSH, and UBPY. STAM adaptor proteins contain VHS (Vps27, Hrs, STAM homology), ubiquitin interacting (UIM), and SH3 domains. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212896 [Multi-domain]  Cd Length: 57  Bit Score: 53.10  E-value: 5.52e-09
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gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11963    4 VRALYDFEAVEDNELTFKHGEIIIVLDDSDANWWKGENHRGVGLFPSNFV 53
SH3_Abp1_fungi_C2 cd11961
Second C-terminal Src homology 3 domain of Fungal Actin-binding protein 1; Abp1 is an adaptor ...
7-58 6.90e-09

Second C-terminal Src homology 3 domain of Fungal Actin-binding protein 1; Abp1 is an adaptor protein that functions in receptor-mediated endocytosis and vesicle trafficking. It contains an N-terminal actin-binding module, the actin-depolymerizing factor (ADF) homology domain, a central proline-rich region, and a C-terminal SH3 domain (many yeast Abp1 proteins contain two C-terminal SH3 domains). Yeast Abp1 also contains two acidic domains that bind directly to the Arp2/3 complex, which is required to initiate actin polymerization. The SH3 domain of yeast Abp1 binds and localizes the kinases, Ark1p and Prk1p, which facilitate actin patch disassembly following vesicle internalization. It also mediates the localization to the actin patch of the synaptojanin-like protein, Sjl2p, which plays a key role in endocytosis. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212894 [Multi-domain]  Cd Length: 53  Bit Score: 52.53  E-value: 6.90e-09
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gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd11961    2 AKALYDYDAAEDNELSFFENDKIINIEFVDDDWWLGECHGSRGLFPSNYVEL 53
SH3_Abi1 cd11971
Src homology 3 domain of Abl Interactor 1; Abi1, also called e3B1, is a central regulator of ...
7-56 7.27e-09

Src homology 3 domain of Abl Interactor 1; Abi1, also called e3B1, is a central regulator of actin cytoskeletal reorganization through interactions with many protein complexes. It is part of WAVE, a nucleation-promoting factor complex, that links Rac 1 activation to actin polymerization causing lamellipodia protrusion at the plasma membrane. Abi1 interact with formins to promote protrusions at the leading edge of motile cells. It also is a target of alpha4 integrin, regulating membrane protrusions at sites of integrin engagement. Abi proteins are adaptor proteins serving as binding partners and substrates of Abl tyrosine kinases. They are involved in regulating actin cytoskeletal reorganization and play important roles in membrane-ruffling, endocytosis, cell motility, and cell migration. Abi proteins contain a homeobox homology domain, a proline-rich region, and a SH3 domain. The SH3 domain of Abi binds to a PxxP motif in Abl. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212904 [Multi-domain]  Cd Length: 59  Bit Score: 52.72  E-value: 7.27e-09
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gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11971    2 VVAIYDYSKDKDDELSFMEGAIIYVIKKNDDGWYEGVCNGVTGLFPGNYV 51
SH3_MYO15 cd11884
Src Homology 3 domain of Myosin XV; This subfamily is composed of proteins with similarity to ...
21-56 7.82e-09

Src Homology 3 domain of Myosin XV; This subfamily is composed of proteins with similarity to Myosin XVa. Myosin XVa is an unconventional myosin that is critical for the normal growth of mechanosensory stereocilia of inner ear hair cells. Mutations in the myosin XVa gene are associated with nonsyndromic hearing loss. Myosin XVa contains a unique N-terminal extension followed by a motor domain, light chain-binding IQ motifs, and a tail consisting of a pair of MyTH4-FERM tandems separated by a SH3 domain, and a PDZ domain. SH3 domains bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs; they play a role in the regulation of enzymes by intramolecular interactions, changing the subcellular localization of signal pathway components and mediate multiprotein complex assemblies.


Pssm-ID: 212817 [Multi-domain]  Cd Length: 56  Bit Score: 52.71  E-value: 7.82e-09
                         10        20        30
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gi 221476505  21 LCFQKGDVITVTQRE---DGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11884   16 LSFHKGDVIKLLPKEgplDPGWLFGTLDGRSGAFPKEYV 54
SH3_SH3RF_2 cd11787
Second Src Homology 3 domain of SH3 domain containing ring finger proteins; This model ...
9-55 8.43e-09

Second Src Homology 3 domain of SH3 domain containing ring finger proteins; This model represents the second SH3 domain of SH3RF1 (or POSH), SH3RF2 (or POSHER), SH3RF3 (POSH2), and similar domains. Members of this family are scaffold proteins that function as E3 ubiquitin-protein ligases. They all contain an N-terminal RING finger domain and multiple SH3 domains; SH3RF1 and SH3RF3 have four SH3 domains while SH3RF2 has three. SH3RF1 plays a role in calcium homeostasis through the control of the ubiquitin domain protein Herp. It may also have a role in regulating death receptor mediated and JNK mediated apoptosis. SH3RF3 interacts with p21-activated kinase 2 (PAK2) and GTP-loaded Rac1. It may play a role in regulating JNK mediated apoptosis in certain conditions. SH3RF2 acts as an anti-apoptotic regulator of the JNK pathway by binding to and promoting the degradation of SH3RF1. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212721 [Multi-domain]  Cd Length: 53  Bit Score: 52.34  E-value: 8.43e-09
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gi 221476505   9 AEYSFMGSNNDE---LCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNY 55
Cdd:cd11787    4 ALYDFEMKDEDEkdcLTFKKGDVITVIRRVDENWAEGRLGDKIGIFPISF 53
SH3_Stac_1 cd11833
First C-terminal Src homology 3 domain of SH3 and cysteine-rich domain-containing (Stac) ...
9-56 9.03e-09

First C-terminal Src homology 3 domain of SH3 and cysteine-rich domain-containing (Stac) proteins; Stac proteins are putative adaptor proteins that contain a cysteine-rich C1 domain and one or two SH3 domains at the C-terminus. There are three mammalian members (Stac1, Stac2, and Stac3) of this family. Stac1 and Stac3 contain two SH3 domains while Stac2 contains a single SH3 domain at the C-terminus. This model represents the first C-terminal SH3 domain of Stac1 and Stac3, and the single C-terminal SH3 domain of Stac2. Stac1 and Stac2 have been found to be expressed differently in mature dorsal root ganglia (DRG) neurons. Stac1 is mainly expressed in peptidergic neurons while Stac2 is found in a subset of nonpeptidergic and all trkB+ neurons. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212767 [Multi-domain]  Cd Length: 53  Bit Score: 52.12  E-value: 9.03e-09
                         10        20        30        40
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gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11833    4 ALYKFKPQENEDLEMRPGDKITLLDDSNEDWWKGKIEDRVGFFPANFV 51
SH3_GRAP_N cd11948
N-terminal Src homology 3 domain of GRB2-related adaptor protein; GRAP is a GRB-2 like adaptor ...
9-56 1.05e-08

N-terminal Src homology 3 domain of GRB2-related adaptor protein; GRAP is a GRB-2 like adaptor protein that is highly expressed in lymphoid tissues. It acts as a negative regulator of T cell receptor (TCR)-induced lymphocyte proliferation by downregulating the signaling to the Ras/ERK pathway. It has been identified as a regulator of TGFbeta signaling in diabetic kidney tubules and may have a role in the pathogenesis of the disease. GRAP contains an N-terminal SH3 domain, a central SH2 domain, and a C-terminal SH3 domain. The N-terminal SH3 domain of the related protein GRB2 binds to Sos and Sos-derived proline-rich peptides. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212881 [Multi-domain]  Cd Length: 54  Bit Score: 52.13  E-value: 1.05e-08
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*....
gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQREDG-GWWEGTLNDKTGWFPSNYV 56
Cdd:cd11948    4 ALYSFQATESDELPFQKGDILKILNMEDDqNWYKAELQGREGYIPKNYI 52
SH3_PLCgamma2 cd11969
Src homology 3 domain of Phospholipase C (PLC) gamma 2; PLCgamma2 is primarily expressed in ...
7-58 1.24e-08

Src homology 3 domain of Phospholipase C (PLC) gamma 2; PLCgamma2 is primarily expressed in haematopoietic cells, specifically in B cells. It is activated by tyrosine phosphorylation by B cell receptor (BCR) kinases and is recruited to the plasma membrane where its substrate is located. It is required in pre-BCR signaling and in the maturation of B cells. PLCs catalyze the hydrolysis of phosphatidylinositol (4,5)-bisphosphate [PtdIns(4,5)P2] to produce Ins(1,4,5)P3 and diacylglycerol (DAG). Ins(1,4,5)P3 initiates the calcium signaling cascade while DAG functions as an activator of PKC. PLCgamma contains a Pleckstrin homology (PH) domain followed by an elongation factor (EF) domain, two catalytic regions of PLC domains that flank two tandem SH2 domains, followed by a SH3 domain and C2 domain. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212902  Cd Length: 55  Bit Score: 52.15  E-value: 1.24e-08
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|...
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTG-WFPSNYVNE 58
Cdd:cd11969    2 VKALYDYRAKRSDELSFCKGALIHNVSKETGGWWKGDYGGKVQhYFPSNYVED 54
SH3_Stac2_C cd11985
C-terminal Src homology 3 domain of SH3 and cysteine-rich domain-containing protein 2 (Stac2); ...
9-56 1.60e-08

C-terminal Src homology 3 domain of SH3 and cysteine-rich domain-containing protein 2 (Stac2); Stac proteins are putative adaptor proteins that contain a cysteine-rich C1 domain and one or two SH3 domains at the C-terminus. There are three mammalian members (Stac1, Stac2, and Stac3) of this family. Stac2 contains a single SH3 domain at the C-terminus unlike Stac1 and Stac3, which contain two C-terminal SH3 domains. Stac1 and Stac2 have been found to be expressed differently in mature dorsal root ganglia (DRG) neurons. Stac1 is mainly expressed in peptidergic neurons while Stac2 is found in a subset of nonpeptidergic and all trkB+ neurons. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212918  Cd Length: 53  Bit Score: 51.49  E-value: 1.60e-08
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*...
gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11985    4 ALYKFLPQENNDLPLQPGDRVMVVDDSNEDWWKGKSGDRVGFFPANFV 51
SH3_Bzz1_2 cd11778
Second Src Homology 3 domain of Bzz1 and similar domains; Bzz1 (or Bzz1p) is a WASP ...
7-55 1.66e-08

Second Src Homology 3 domain of Bzz1 and similar domains; Bzz1 (or Bzz1p) is a WASP/Las17-interacting protein involved in endocytosis and trafficking to the vacuole. It physically interacts with type I myosins and functions in the early steps of endocytosis. Together with other proteins, it induces membrane scission in yeast. Bzz1 contains an N-terminal F-BAR (FES-CIP4 Homology and Bin/Amphiphysin/Rvs), a central coiled-coil, and two C-terminal SH3 domains. This model represents the second C-terminal SH3 domain. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212712 [Multi-domain]  Cd Length: 51  Bit Score: 51.34  E-value: 1.66e-08
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                 ....*....|....*....|....*....|....*....|....*....|
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDG-GWWEGTLNDKTGWFPSNY 55
Cdd:cd11778    2 VEALYDYEAQGDDEISIRVGDRIAVIRGDDGsGWTYGEINGVKGLFPTSY 51
SH3_DNMBP_N3 cd11796
Third N-terminal Src homology 3 domain of Dynamin Binding Protein, also called Tuba; DNMBP or ...
18-56 1.76e-08

Third N-terminal Src homology 3 domain of Dynamin Binding Protein, also called Tuba; DNMBP or Tuba is a cdc42-specific guanine nucleotide exchange factor (GEF) that contains four N-terminal SH3 domains, a central RhoGEF [or Dbl homology (DH)] domain followed by a Bin/Amphiphysin/Rvs (BAR) domain, and two C-terminal SH3 domains. It provides a functional link between dynamin and key regulatory proteins of the actin cytoskeleton. It plays an important role in regulating cell junction configuration. The four N-terminal SH3 domains of DNMBP binds the GTPase dynamin, which plays an important role in the fission of endocytic vesicles. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212730  Cd Length: 51  Bit Score: 51.20  E-value: 1.76e-08
                         10        20        30
                 ....*....|....*....|....*....|....*....
gi 221476505  18 NDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11796   13 DEELDLREGDVVTITGILDKGWFRGELNGRRGIFPEGFV 51
SH3_FCHSD2_2 cd11894
Second Src Homology 3 domain of FCH and double SH3 domains protein 2; FCHSD2 has a domain ...
7-58 1.91e-08

Second Src Homology 3 domain of FCH and double SH3 domains protein 2; FCHSD2 has a domain structure consisting of an N-terminal F-BAR (FES-CIP4 Homology and Bin/Amphiphysin/Rvs), two SH3, and C-terminal proline-rich domains. It has only been characterized in silico and its function is unknown. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212827  Cd Length: 56  Bit Score: 51.48  E-value: 1.91e-08
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                 ....*....|....*....|....*....|....*....|....*....|....*
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQRE---DGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd11894    2 VKALYDYEGQTDDELSFPEGAIIRILNKEnqdDDGFWEGEFNGRIGVFPSVLVEE 56
SH3_ASAP cd11821
Src homology 3 domain of ArfGAP with SH3 domain, ankyrin repeat and PH domain containing ...
7-55 2.71e-08

Src homology 3 domain of ArfGAP with SH3 domain, ankyrin repeat and PH domain containing proteins; ASAPs are Arf GTPase activating proteins (GAPs) and they function in regulating cell growth, migration, and invasion. They contain an N-terminal BAR domain, followed by a Pleckstrin homology (PH) domain, an Arf GAP domain, ankyrin (ANK) repeats, and a C-terminal SH3 domain. Vertebrates contain at least three members, ASAP1, ASAP2, and ASAP3, but some ASAP3 proteins do not seem to harbor a C-terminal SH3 domain. ASAP1 and ASAP2 show GTPase activating protein (GAP) activity towards Arf1 and Arf5. They do not show GAP activity towards Arf6, but are able to mediate Arf6 signaling by binding stably to GTP-Arf6. ASAP3 is an Arf6-specific GAP. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212755 [Multi-domain]  Cd Length: 53  Bit Score: 50.78  E-value: 2.71e-08
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                 ....*....|....*....|....*....|....*....|....*....|..
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLN---DKTGWFPSNY 55
Cdd:cd11821    2 VRALYDCQADNDDELTFSEGEIIVVTGEEDDEWWEGHIEgdpSRRGVFPVSF 53
SH3_CD2AP_1 cd12053
First Src Homology 3 domain (SH3A) of CD2-associated protein; CD2AP, also called CMS (Cas ...
10-60 3.03e-08

First Src Homology 3 domain (SH3A) of CD2-associated protein; CD2AP, also called CMS (Cas ligand with Multiple SH3 domains) or METS1 (Mesenchyme-to-Epithelium Transition protein with SH3 domains), is a cytosolic adaptor protein that plays a role in regulating the cytoskeleton. It is critical in cell-to-cell union necessary for kidney function. It also stabilizes the contact between a T cell and antigen-presenting cells. It is primarily expressed in podocytes at the cytoplasmic face of the slit diaphragm and serves as a linker anchoring podocin and nephrin to the actin cytoskeleton. CD2AP contains three SH3 domains, a proline-rich region, and a C-terminal coiled-coil domain. All of these domains enable CD2AP to bind various protein partners and assemble complexes that have been implicated in many different functions. This alignment model represents the first SH3 domain (SH3A) of CD2AP. SH3A binds to the PXXXPR motif present in c-Cbl and the cytoplasmic domain of cell adhesion protein CD2. Its interaction with CD2 anchors CD2 at sites of cell contact. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212986  Cd Length: 56  Bit Score: 51.00  E-value: 3.03e-08
                         10        20        30        40        50
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gi 221476505  10 EYSFMGSNNDELCFQKGDVI-TVTQREDGGWWEGTLNDKTGWFPSNYVNECK 60
Cdd:cd12053    5 EYDYDAVHEDELTIRVGEIIrNVKKLEEEGWLEGELNGRRGMFPDNFVKEIK 56
SH3_Nebulin_C cd11933
C-terminal Src Homology 3 domain of Nebulin; Nebulin is a giant filamentous protein (600-900 ...
6-56 3.78e-08

C-terminal Src Homology 3 domain of Nebulin; Nebulin is a giant filamentous protein (600-900 kD) that is expressed abundantly in skeletal muscle. It binds to actin thin filaments and regulates its assembly and function. Nebulin was thought to be part of a molecular ruler complex that is critical in determining the lengths of actin thin filaments in skeletal muscle since its length, which varies due to alternative splicing, correlates with the length of thin filaments in various muscle types. Recent studies indicate that nebulin regulates thin filament length by stabilizing the filaments and preventing depolymerization. Mutations in nebulin can cause nemaline myopathy, characterized by muscle weakness which can be severe and can lead to neonatal lethality. Nebulin contains an N-terminal LIM domain, many nebulin repeats/super repeats, and a C-terminal SH3 domain. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212866 [Multi-domain]  Cd Length: 58  Bit Score: 50.78  E-value: 3.78e-08
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|...
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLN--DKTGWFPSNYV 56
Cdd:cd11933    3 SFRAMYDYRAADDDEVSFKDGDTIVNVQTIDEGWMYGTVQrtGKTGMLPANYV 55
SH3_Intersectin2_1 cd11988
First Src homology 3 domain (or SH3A) of Intersectin-2; Intersectin-2 (ITSN2) is an adaptor ...
8-56 5.01e-08

First Src homology 3 domain (or SH3A) of Intersectin-2; Intersectin-2 (ITSN2) is an adaptor protein that functions in exo- and endocytosis, actin cytoskeletal reorganization, and signal transduction. It plays a role in clathrin-coated pit (CCP) formation. It binds to many proteins through its multidomain structure and facilitate the assembly of multimeric complexes. ITSN2 also functions as a specific GEF for Cdc42 activation in epithelial morphogenesis, and is required in mitotic spindle orientation. It exists in alternatively spliced short and long isoforms. The short isoform contains two Eps15 homology domains (EH1 and EH2), a coiled-coil region and five SH3 domains (SH3A-E), while the long isoform, in addition, contains RhoGEF (also called Dbl-homologous or DH), Pleckstrin homology (PH) and C2 domains. The first SH3 domain (or SH3A) of ITSN2 is expected to bind many protein partners, similar to ITSN1 which has been shown to bind Sos1, dynamin1/2, CIN85, c-Cbl, PI3K-C2, SHIP2, N-WASP, and CdGAP, among others. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212921 [Multi-domain]  Cd Length: 57  Bit Score: 50.26  E-value: 5.01e-08
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|.
gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQREDG--GWWEGTLNDKTGWFPSNYV 56
Cdd:cd11988    5 RALYPFEARNHDEMSFNAGDIIQVDEKTVGepGWLYGSFQGNFGWFPCNYV 55
SH3_AHI-1 cd11812
Src Homology 3 domain of Abelson helper integration site-1 (AHI-1); AHI-1, also called ...
7-56 5.80e-08

Src Homology 3 domain of Abelson helper integration site-1 (AHI-1); AHI-1, also called Jouberin, is expressed in high levels in the brain, gonad tissues, and skeletal muscle. It is an adaptor protein that interacts with the small GTPase Rab8a and regulates it distribution and function, affecting cilium formation and vesicle transport. Mutations in the AHI-1 gene can cause Joubert syndrome, a disorder characterized by brainstem malformations, cerebellar aplasia/hypoplasia, and retinal dystrophy. AHI-1 variation is also associated with susceptibility to schizophrenia and type 2 diabetes mellitus progression. AHI-1 contains WD40 and SH3 domains. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212746 [Multi-domain]  Cd Length: 52  Bit Score: 49.82  E-value: 5.80e-08
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|.
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTL-NDKTGWFPSNYV 56
Cdd:cd11812    2 VVALYDYTANRSDELTIHRGDIIRVLYKDNDNWWFGSLvNGQQGYFPANYV 52
SH3_MLK cd11876
Src Homology 3 domain of Mixed Lineage Kinases; MLKs are Serine/Threonine Kinases (STKs), ...
9-58 6.36e-08

Src Homology 3 domain of Mixed Lineage Kinases; MLKs are Serine/Threonine Kinases (STKs), catalyzing the transfer of the gamma-phosphoryl group from ATP to S/T residues on protein substrates. MLKs act as mitogen-activated protein kinase kinase kinases (MAP3Ks, MKKKs, MAPKKKs), which phosphorylate and activate MAPK kinases (MAPKKs or MKKs or MAP2Ks), which in turn phosphorylate and activate MAPKs during signaling cascades that are important in mediating cellular responses to extracellular signals. MLKs play roles in immunity and inflammation, as well as in cell death, proliferation, and cell cycle regulation. Mammals have four MLKs (MLK1-4), mostly conserved in vertebrates, which contain an SH3 domain, a catalytic kinase domain, a leucine zipper, a proline-rich region, and a CRIB domain that mediates binding to GTP-bound Cdc42 and Rac. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212809 [Multi-domain]  Cd Length: 58  Bit Score: 50.20  E-value: 6.36e-08
                         10        20        30        40        50
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gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQRE-----DGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd11876    4 ALFDYDARGEDELTLRRGQPVEVLSKDaavsgDEGWWTGKIGDKVGIFPSNYVAP 58
SH3_ASPP cd11807
Src homology 3 domain of Apoptosis Stimulating of p53 proteins (ASPP); The ASPP family of ...
6-55 6.94e-08

Src homology 3 domain of Apoptosis Stimulating of p53 proteins (ASPP); The ASPP family of proteins bind to important regulators of apoptosis (p53, Bcl-2, and RelA) and cell growth (APCL, PP1). They share similarity at their C-termini, where they harbor a proline-rich region, four ankyrin (ANK) repeats, and an SH3 domain. Vertebrates contain three members of the family: ASPP1, ASPP2, and iASPP. ASPP1 and ASPP2 activate the apoptotic function of the p53 family of tumor suppressors (p53, p63, and p73), while iASPP is an oncoprotein that specifically inhibits p53-induced apoptosis. The expression of ASPP proteins is altered in tumors; ASPP1 and ASPP2 are downregulated whereas iASPP is upregulated is some cancer types. ASPP proteins also bind and regulate protein phosphatase 1 (PP1), and this binding is competitive with p53 binding. The SH3 domain and the ANK repeats of ASPP contribute to the p53 binding site; they bind to the DNA binding domain of p53. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212741 [Multi-domain]  Cd Length: 57  Bit Score: 50.07  E-value: 6.94e-08
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|...
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQREDGG---WWEGTLNDKTGWFPSNY 55
Cdd:cd11807    2 VVYALFDYEAENGDELSFREGDELTVLRKGDDDeteWWWARLNDKEGYVPRNL 54
SH3_Nck1_3 cd11904
Third Src Homology 3 domain of Nck1 adaptor protein; Nck1 (also called Nckalpha) plays a ...
6-56 7.06e-08

Third Src Homology 3 domain of Nck1 adaptor protein; Nck1 (also called Nckalpha) plays a crucial role in connecting signaling pathways of tyrosine kinase receptors and important effectors in actin dynamics and cytoskeletal remodeling. It binds and activates RasGAP, resulting in the downregulation of Ras. It is also involved in the signaling of endothilin-mediated inhibition of cell migration. Nck adaptor proteins regulate actin cytoskeleton dynamics by linking proline-rich effector molecules to protein tyrosine kinases and phosphorylated signaling intermediates. They contain three SH3 domains and a C-terminal SH2 domain. They function downstream of the PDGFbeta receptor and are involved in Rho GTPase signaling and actin dynamics. Vertebrates contain two Nck adaptor proteins: Nck1 (also called Nckalpha) and Nck2, which show partly overlapping functions but also bind distinct targets. The third SH3 domain of Nck appears to prefer ligands with a PxAPxR motif. SH3 domains are protein interaction domains that usually bind to proline-rich ligands with moderate affinity and selectivity, preferentially a PxxP motif. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212837 [Multi-domain]  Cd Length: 57  Bit Score: 50.03  E-value: 7.06e-08
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gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQR--EDGGWWE-GTLNDKTGWFPSNYV 56
Cdd:cd11904    2 VVQALYPFSSSNDEELNFEKGEVMDVIEKpeNDPEWWKcRKANGQVGLVPKNYV 55
SH3_ARHGEF5_19 cd11940
Src homology 3 domain of the Rho guanine nucleotide exchange factors ARHGEF5 and ARHGEF19; ...
7-58 7.24e-08

Src homology 3 domain of the Rho guanine nucleotide exchange factors ARHGEF5 and ARHGEF19; ARHGEF5, also called ephexin-3 or TIM (Transforming immortalized mammary oncogene), is a potent activator of RhoA and it plays roles in regulating cell shape, adhesion, and migration. It binds to the SH3 domain of Src and is involved in regulating Src-induced podosome formation. ARHGEF19, also called ephexin-2 or WGEF (weak-similarity GEF), is highly expressed in the intestine, liver, heart and kidney. It activates RhoA, Cdc42, and Rac 1, and has been shown to activate RhoA in the Wnt-PCP (planar cell polarity) pathway. It is involved in the regulation of cell polarity and cytoskeletal reorganization. ARHGEF5 and ARHGEF19 contain RhoGEF (also called Dbl-homologous or DH), Pleckstrin Homology (PH), and SH3 domains. The SH3 domains of ARHGEFs play an autoinhibitory role through intramolecular interactions with a proline-rich region N-terminal to the DH domain. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212873  Cd Length: 55  Bit Score: 49.79  E-value: 7.24e-08
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGT-LND-KTGWFPSNYVNE 58
Cdd:cd11940    2 VQCIRSYKAQENDELTLEKADIIMVRQQSSDGWLEGVrLSDgERGWFPQSHVEE 55
SH3_PEX13_eumet cd11864
Src Homology 3 domain of eumetazoan Peroxisomal biogenesis factor 13; PEX13 is a peroxin and ...
6-56 7.37e-08

Src Homology 3 domain of eumetazoan Peroxisomal biogenesis factor 13; PEX13 is a peroxin and is required for protein import into the peroxisomal matrix and membrane. It is an integral membrane protein that is essential for the localization of PEX14 and the import of proteins containing the peroxisome matrix targeting signals, PTS1 and PTS2. Mutations of the PEX13 gene in humans lead to a wide range of peroxisome biogenesis disorders (PBDs), the most severe of which is known as Zellweger syndrome (ZS), a severe multisystem disorder characterized by hypotonia, psychomotor retardation, and neuronal migration defects. PEX13 contains two transmembrane regions and a C-terminal SH3 domain. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212798  Cd Length: 58  Bit Score: 49.94  E-value: 7.37e-08
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*.
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQRE----DGGWWEGTLND-KTGWFPSNYV 56
Cdd:cd11864    1 VARAEYDFVAESEDELSFRAGDKLRLAPKElqprVRGWLLATVDGqKIGLVPANYV 56
SH3_GRB2_N cd11946
N-terminal Src homology 3 domain of Growth factor receptor-bound protein 2; GRB2 is a critical ...
9-56 7.76e-08

N-terminal Src homology 3 domain of Growth factor receptor-bound protein 2; GRB2 is a critical signaling molecule that regulates the Ras pathway by linking tyrosine kinases to the Ras guanine nucleotide releasing protein Sos (son of sevenless), which converts Ras to the active GTP-bound state. It is ubiquitously expressed in all tissues throughout development and is important in cell cycle progression, motility, morphogenesis, and angiogenesis. In lymphocytes, GRB2 is associated with antigen receptor signaling components. GRB2 contains an N-terminal SH3 domain, a central SH2 domain, and a C-terminal SH3 domain. Its N-terminal SH3 domain binds to Sos and Sos-derived proline-rich peptides. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212879 [Multi-domain]  Cd Length: 56  Bit Score: 49.64  E-value: 7.76e-08
                         10        20        30        40
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gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQRE-DGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11946    5 AKYDFKATADDELSFKRGDILKVLNEEcDQNWYKAELNGKDGFIPKNYI 53
SH3_SGSM3 cd11813
Src Homology 3 domain of Small G protein Signaling Modulator 3; SGSM3 is also called ...
8-56 8.37e-08

Src Homology 3 domain of Small G protein Signaling Modulator 3; SGSM3 is also called Merlin-associated protein (MAP), RUN and SH3 domain-containing protein (RUSC3), RUN and TBC1 domain-containing protein 3 (RUTBC3), Rab GTPase-activating protein 5 (RabGAP5), or Rab GAP-like protein (RabGAPLP). It is expressed ubiquitously and functions as a regulator of small G protein RAP- and RAB-mediated neuronal signaling. It is involved in modulating NGF-mediated neurite outgrowth and differentiation. It also interacts with the tumor suppressor merlin and may play a role in the merlin-associated suppression of cell growth. SGSM3 contains TBC, SH3, and RUN domains. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212747  Cd Length: 53  Bit Score: 49.42  E-value: 8.37e-08
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*....
gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11813    3 KALLDFERHDDDELGFRKNDIITIISQKDEHCWVGELNGLRGWFPAKFV 51
SH3_Eve1_3 cd11816
Third Src homology 3 domain of ADAM-binding protein Eve-1; Eve-1, also called SH3 ...
9-56 8.56e-08

Third Src homology 3 domain of ADAM-binding protein Eve-1; Eve-1, also called SH3 domain-containing protein 19 (SH3D19) or EEN-binding protein (EBP), exists in multiple alternatively spliced isoforms. The longest isoform contains five SH3 domain in the C-terminal region and seven proline-rich motifs in the N-terminal region. It is abundantly expressed in skeletal muscle and heart, and may be involved in regulating the activity of ADAMs (A disintegrin and metalloproteases). Eve-1 interacts with EEN, an endophilin involved in endocytosis and may be the target of the MLL-EEN fusion protein that is implicated in leukemogenesis. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212750 [Multi-domain]  Cd Length: 51  Bit Score: 49.33  E-value: 8.56e-08
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*...
gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11816    4 ARFDFEGEQEDELSFSEGDVITLKEYVGEEWAKGELNGKIGIFPLNFV 51
SH3_p40phox cd11869
Src Homology 3 domain of the p40phox subunit of NADPH oxidase; p40phox, also called Neutrophil ...
8-56 9.14e-08

Src Homology 3 domain of the p40phox subunit of NADPH oxidase; p40phox, also called Neutrophil cytosol factor 4 (NCF-4), is a cytosolic subunit of the phagocytic NADPH oxidase complex (also called Nox2 or gp91phox) which plays a crucial role in the cellular response to bacterial infection. NADPH oxidase catalyzes the transfer of electrons from NADPH to oxygen during phagocytosis forming superoxide and reactive oxygen species. p40phox positively regulates NADPH oxidase in both phosphatidylinositol-3-phosphate (PI3P)-dependent and PI3P-independent manner. It contains an N-terminal PX domain, a central SH3 domain, and a C-terminal PB1 domain that interacts with p67phox. The SH3 domain of p40phox binds to canonical polyproline and noncanonical motifs at the C-terminus of p47phox. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212802  Cd Length: 54  Bit Score: 49.41  E-value: 9.14e-08
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*....
gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11869    3 EALFDFTGNSKLELNFKAGDVIFLLSRVNKDWLEGTVRGATGIFPLSFV 51
SH3_Abp1_eu cd11960
Src homology 3 domain of eumetazoan Actin-binding protein 1; Abp1, also called drebrin-like ...
7-56 1.09e-07

Src homology 3 domain of eumetazoan Actin-binding protein 1; Abp1, also called drebrin-like protein, is an adaptor protein that functions in receptor-mediated endocytosis and vesicle trafficking. It contains an N-terminal actin-binding module, the actin-depolymerizing factor (ADF) homology domain, a helical domain, and a C-terminal SH3 domain. Mammalian Abp1, unlike yeast Abp1, does not contain an acidic domain that interacts with the Arp2/3 complex. It regulates actin dynamics indirectly by interacting with dynamin and WASP family proteins. Abp1 deficiency causes abnormal organ structure and function of the spleen, heart, and lung of mice. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212893 [Multi-domain]  Cd Length: 54  Bit Score: 49.32  E-value: 1.09e-07
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|.
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKT-GWFPSNYV 56
Cdd:cd11960    2 ARALYDYQAADDTEISFDPGDIITDIEQIDEGWWRGTGPDGTyGLFPANYV 52
SH3_Stac3_1 cd11986
First C-terminal Src homology 3 domain of SH3 and cysteine-rich domain-containing protein 3 ...
9-56 1.15e-07

First C-terminal Src homology 3 domain of SH3 and cysteine-rich domain-containing protein 3 (Stac3); Stac proteins are putative adaptor proteins that contain a cysteine-rich C1 domain and one or two SH3 domains at the C-terminus. There are three mammalian members (Stac1, Stac2, and Stac3) of this family. Stac1 and Stac3 contain two SH3 domains while Stac2 contains a single SH3 domain at the C-terminus. Stac1 and Stac2 have been found to be expressed differently in mature dorsal root ganglia (DRG) neurons. Stac1 is mainly expressed in peptidergic neurons while Stac2 is found in a subset of nonpeptidergic and all trkB+ neurons. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212919 [Multi-domain]  Cd Length: 53  Bit Score: 49.14  E-value: 1.15e-07
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*...
gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11986    4 ALYRFKALEKDDLDFHPGERITVIDDSNEEWWRGKIGEKTGYFPMNFI 51
SH3_Cyk3p-like cd11889
Src Homology 3 domain of Cytokinesis protein 3 and similar proteins; Cytokinesis protein 3 ...
7-56 1.29e-07

Src Homology 3 domain of Cytokinesis protein 3 and similar proteins; Cytokinesis protein 3 (Cyk3 or Cyk3p) is a component of the actomyosin ring independent cytokinesis pathway in yeast. It interacts with Inn1 and facilitates its recruitment to the bud neck, thereby promoting cytokinesis. Cyk3p contains an N-terminal SH3 domain and a C-terminal transglutaminase-like domain. The Cyk3p SH3 domain binds to the C-terminal proline-rich region of Inn1. SH3 domains bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs; they play a role in the regulation of enzymes by intramolecular interactions, changing the subcellular localization of signal pathway components and mediate multiprotein complex assemblies.


Pssm-ID: 212822  Cd Length: 53  Bit Score: 49.03  E-value: 1.29e-07
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|..
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTL--NDKTGWFPSNYV 56
Cdd:cd11889    2 VKAVYSWAGETEGDLGFLEGDLIEVLSIGDGSWWSGKLrrNGAEGIFPSNFV 53
SH3_MLK4 cd12058
Src Homology 3 domain of Mixed Lineage Kinase 4; MLK4 is a Serine/Threonine Kinase (STK), ...
9-56 1.41e-07

Src Homology 3 domain of Mixed Lineage Kinase 4; MLK4 is a Serine/Threonine Kinase (STK), catalyzing the transfer of the gamma-phosphoryl group from ATP to S/T residues on protein substrates. MLKs act as mitogen-activated protein kinase kinase kinases (MAP3Ks, MKKKs, MAPKKKs), which phosphorylate and activate MAPK kinases (MAPKKs or MKKs or MAP2Ks), which in turn phosphorylate and activate MAPKs during signaling cascades that are important in mediating cellular responses to extracellular signals. MLKs play roles in immunity and inflammation, as well as in cell death, proliferation, and cell cycle regulation. The specific function of MLK4 is yet to be determined. Mutations in the kinase domain of MLK4 have been detected in colorectal cancers. MLK4 contains an SH3 domain, a catalytic kinase domain, a leucine zipper, a proline-rich region, and a CRIB domain that mediates binding to GTP-bound Cdc42 and Rac. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212991 [Multi-domain]  Cd Length: 58  Bit Score: 49.17  E-value: 1.41e-07
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|...
gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQRE-----DGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd12058    4 ALYDYEASGEDELSLRRGDVVEVLSQDaavsgDDGWWAGKIRHRLGIFPANYV 56
SH3_Sorbs1_3 cd11916
Third (or C-terminal) Src Homology 3 domain of Sorbin and SH3 domain containing 1 (Sorbs1), ...
8-56 1.44e-07

Third (or C-terminal) Src Homology 3 domain of Sorbin and SH3 domain containing 1 (Sorbs1), also called ponsin; Sorbs1 is also called ponsin, SH3P12, or CAP (c-Cbl associated protein). It is an adaptor protein containing one sorbin homology (SoHo) and three SH3 domains. It binds Cbl and plays a major role in regulating the insulin signaling pathway by enhancing insulin-induced phosphorylation of Cbl. Sorbs1, like vinexin, localizes at cell-ECM and cell-cell adhesion sites where it binds vinculin, paxillin, and afadin. It may function in the control of cell motility. Other interaction partners of Sorbs1 include c-Abl, Sos, flotillin, Grb4, ataxin-7, filamin C, among others. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212849 [Multi-domain]  Cd Length: 59  Bit Score: 49.22  E-value: 1.44e-07
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|.
gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGT--LNDKTGWFPSNYV 56
Cdd:cd11916    5 QALYSYAPQNDDELELRDGDIVDVMEKCDDGWFVGTsrRTKQFGTFPGNYV 55
SH3_ARHGEF9 cd11975
Src homology 3 domain of the Rho guanine nucleotide exchange factor ARHGEF9; ARHGEF9, also ...
2-56 1.51e-07

Src homology 3 domain of the Rho guanine nucleotide exchange factor ARHGEF9; ARHGEF9, also called PEM2 or collybistin, selectively activates Cdc42 by exchanging bound GDP for free GTP. It is highly expressed in the brain and it interacts with gephyrin, a postsynaptic protein associated with GABA and glycine receptors. Mutations in the ARHGEF9 gene cause X-linked mental retardation with associated features like seizures, hyper-anxiety, aggressive behavior, and sensory hyperarousal. ARHGEF9 contains a SH3 domain followed by RhoGEF (also called Dbl-homologous or DH) and Pleckstrin Homology (PH) domains. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212908  Cd Length: 62  Bit Score: 49.32  E-value: 1.51e-07
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*
gi 221476505   2 DQPLVVQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11975    2 GSIVSAEAVWDHVTMANRELAFKAGDVIKVLDASNKDWWWGQIDDEEGWFPASFV 56
SH3_CRK_N cd11758
N-terminal Src Homology 3 domain of Ct10 Regulator of Kinase adaptor proteins; CRK adaptor ...
7-58 1.66e-07

N-terminal Src Homology 3 domain of Ct10 Regulator of Kinase adaptor proteins; CRK adaptor proteins consists of SH2 and SH3 domains, which bind tyrosine-phosphorylated peptides and proline-rich motifs, respectively. They function downstream of protein tyrosine kinases in many signaling pathways started by various extracellular signals, including growth and differentiation factors. Cellular CRK (c-CRK) contains a single SH2 domain, followed by N-terminal and C-terminal SH3 domains. It is involved in the regulation of many cellular processes including cell growth, motility, adhesion, and apoptosis. CRK has been implicated in the malignancy of various human cancers. The N-terminal SH3 domain of CRK binds a number of target proteins including DOCK180, C3G, SOS, and cABL. The CRK family includes two alternatively spliced protein forms, CRKI and CRKII, that are expressed by the CRK gene, and the CRK-like (CRKL) protein, which is expressed by a distinct gene (CRKL). SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212692 [Multi-domain]  Cd Length: 55  Bit Score: 48.90  E-value: 1.66e-07
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|...
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLND-KTGWFPSNYVNE 58
Cdd:cd11758    3 VRALFDFPGNDDEDLPFKKGEILTVIRKPEEQWWNARNSEgKTGMIPVPYVEK 55
SH3_GRB2_like_N cd11804
N-terminal Src homology 3 domain of Growth factor receptor-bound protein 2 (GRB2) and related ...
9-56 1.86e-07

N-terminal Src homology 3 domain of Growth factor receptor-bound protein 2 (GRB2) and related proteins; This family includes the adaptor protein GRB2 and related proteins including Drosophila melanogaster Downstream of receptor kinase (DRK), Caenorhabditis elegans Sex muscle abnormal protein 5 (Sem-5), GRB2-related adaptor protein (GRAP), GRAP2, and similar proteins. Family members contain an N-terminal SH3 domain, a central SH2 domain, and a C-terminal SH3 domain. GRB2/Sem-5/DRK is a critical signaling molecule that regulates the Ras pathway by linking tyrosine kinases to the Ras guanine nucleotide releasing protein Sos (son of sevenless), which converts Ras to the active GTP-bound state. GRAP2 plays an important role in T cell receptor (TCR) signaling by promoting the formation of the SLP-76:LAT complex, which couples the TCR to the Ras pathway. GRAP acts as a negative regulator of T cell receptor (TCR)-induced lymphocyte proliferation by downregulating the signaling to the Ras/ERK pathway. The N-terminal SH3 domain of GRB2 binds to Sos and Sos-derived proline-rich peptides. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212738 [Multi-domain]  Cd Length: 52  Bit Score: 48.51  E-value: 1.86e-07
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*....
gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQRE-DGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11804    4 AKHDFKATAEDELSFKKGSILKVLNMEdDPNWYKAELDGKEGLIPKNYI 52
SH3_SH3RF_3 cd11783
Third Src Homology 3 domain of SH3 domain containing ring finger 1 (SH3RF1), SH3RF3, and ...
6-56 2.07e-07

Third Src Homology 3 domain of SH3 domain containing ring finger 1 (SH3RF1), SH3RF3, and similar domains; SH3RF1 (or POSH) and SH3RF3 (or POSH2) are scaffold proteins that function as E3 ubiquitin-protein ligases. They contain an N-terminal RING finger domain and four SH3 domains. This model represents the third SH3 domain, located in the middle of SH3RF1 and SH3RF3, and similar domains. SH3RF1 plays a role in calcium homeostasis through the control of the ubiquitin domain protein Herp. It may also have a role in regulating death receptor mediated and JNK mediated apoptosis. SH3RF3 interacts with p21-activated kinase 2 (PAK2) and GTP-loaded Rac1. It may play a role in regulating JNK mediated apoptosis in certain conditions. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212717 [Multi-domain]  Cd Length: 55  Bit Score: 48.54  E-value: 2.07e-07
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|...
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGT--LNDKTGWFPSNYV 56
Cdd:cd11783    1 IYVALYPYKPQKPDELELRKGEMYTVTEKCQDGWFKGTslRTGQSGVFPGNYV 53
SH3_Intersectin1_2 cd11989
Second Src homology 3 domain (or SH3B) of Intersectin-1; Intersectin-1 (ITSN1) is an adaptor ...
8-56 2.31e-07

Second Src homology 3 domain (or SH3B) of Intersectin-1; Intersectin-1 (ITSN1) is an adaptor protein that functions in exo- and endocytosis, actin cytoskeletal reorganization, and signal transduction. It plays a role in clathrin-coated pit (CCP) formation. It binds to many proteins through its multidomain structure and facilitate the assembly of multimeric complexes. ITSN1 localizes in membranous organelles, CCPs, the Golgi complex, and may be involved in the cell membrane trafficking system. It exists in alternatively spliced short and long isoforms. The short isoform contains two Eps15 homology domains (EH1 and EH2), a coiled-coil region and five SH3 domains (SH3A-E), while the long isoform, in addition, contains RhoGEF (also called Dbl-homologous or DH), Pleckstrin homology (PH) and C2 domains. The second SH3 domain (or SH3B) of ITSN1 has been shown to bind WNK and CdGAP. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212922 [Multi-domain]  Cd Length: 52  Bit Score: 48.17  E-value: 2.31e-07
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*....
gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQREDgGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11989    3 QALYPWRAKKDNHLNFNKNDVITVLEQQD-MWWFGEVQGQKGWFPKSYV 50
PH_PLEKHN1 cd13323
Pleckstrin homology domain containing family N member 1Pleckstrin homology-like domain; Not ...
295-380 2.35e-07

Pleckstrin homology domain containing family N member 1Pleckstrin homology-like domain; Not much is known about PLEKHN1. It is found in a wide range of animals including humans, green anole, frog, and zebrafish. It contains a single PH domain. PH domains have diverse functions, but in general are involved in targeting proteins to the appropriate cellular location or in the interaction with a binding partner. They share little sequence conservation, but all have a common fold, which is electrostatically polarized. Less than 10% of PH domains bind phosphoinositide phosphates (PIPs) with high affinity and specificity. PH domains are distinguished from other PIP-binding domains by their specific high-affinity binding to PIPs with two vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3 which results in targeting some PH domain proteins to the plasma membrane. A few display strong specificity in lipid binding. Any specificity is usually determined by loop regions or insertions in the N-terminus of the domain, which are not conserved across all PH domains. PH domains are found in cellular signaling proteins such as serine/threonine kinase, tyrosine kinases, regulators of G-proteins, endocytotic GTPases, adaptors, as well as cytoskeletal associated molecules and in lipid associated enzymes.


Pssm-ID: 270132  Cd Length: 121  Bit Score: 50.55  E-value: 2.35e-07
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 221476505 295 DRYFVLFPQTLLFLSvsQRMSAFIYEGKLPLTGIIVNrLEDTDALKNAFEISSPLIDRIVAVCQGPNEANKWVELLNA-- 372
Cdd:cd13323   25 DRLLVLYPSSLIILS--EESDGLCFKGELPLNAIQVN-FEENEKKIRSFLIEGRLINTIRVSCLSYEDYQDWILCLKTaq 101
                         90
                 ....*....|.
gi 221476505 373 ---NNPSLPMG 380
Cdd:cd13323  102 vrnGDSSLPGS 112
SH3_Src_like cd11845
Src homology 3 domain of Src kinase-like Protein Tyrosine Kinases; Src subfamily members ...
6-55 2.41e-07

Src homology 3 domain of Src kinase-like Protein Tyrosine Kinases; Src subfamily members include Src, Lck, Hck, Blk, Lyn, Fgr, Fyn, Yrk, Yes, and Brk. Src (or c-Src) proteins are cytoplasmic (or non-receptor) PTKs which are anchored to the plasma membrane. They contain an N-terminal SH4 domain with a myristoylation site, followed by SH3 and SH2 domains, a tyr kinase domain, and a regulatory C-terminal region containing a conserved tyr. They are activated by autophosphorylation at the tyr kinase domain, but are negatively regulated by phosphorylation at the C-terminal tyr by Csk (C-terminal Src Kinase). However, Brk lacks the N-terminal myristoylation sites. Src proteins are involved in signaling pathways that regulate cytokine and growth factor responses, cytoskeleton dynamics, cell proliferation, survival, and differentiation. They were identified as the first proto-oncogene products, and they regulate cell adhesion, invasion, and motility in cancer cells, and tumor vasculature, contributing to cancer progression and metastasis. Src kinases are overexpressed in a variety of human cancers, making them attractive targets for therapy. They are also implicated in acute inflammatory responses and osteoclast function. Src, Fyn, Yes, and Yrk are widely expressed, while Blk, Lck, Hck, Fgr, Lyn, and Brk show a limited expression pattern. This subfamily also includes Drosophila Src42A, Src oncogene at 42A (also known as Dsrc41) which accumulates at sites of cell-cell or cell-matrix adhesion, and participates in Drosphila development and wound healing. It has been shown to promote tube elongation in the tracheal system, is essential for proper cell-cell matching during dorsal closure, and regulates cell-cell contacts in developing Drosophila eyes. The SH3 domain of Src kinases contributes to substrate recruitment by binding adaptor proteins/substrates, and regulation of kinase activity through an intramolecular interaction. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212779 [Multi-domain]  Cd Length: 52  Bit Score: 48.35  E-value: 2.41e-07
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|..
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLND--KTGWFPSNY 55
Cdd:cd11845    1 IYVALYDYEARTDDDLSFKKGDRLQILDDSDGDWWLARHLStgKEGYIPSNY 52
SH3_Shank cd11832
Src homology 3 domain of SH3 and multiple ankyrin repeat domains (Shank) proteins; Shank ...
20-53 2.45e-07

Src homology 3 domain of SH3 and multiple ankyrin repeat domains (Shank) proteins; Shank proteins carry scaffolding functions through multiple sites of protein-protein interaction in its domain architecture, including ankyrin (ANK) repeats, a long proline rich region, as well as SH3, PDZ, and SAM domains. They bind a variety of membrane and cytosolic proteins, and exist in alternatively spliced isoforms. They are highly enriched in postsynaptic density (PSD) where they interact with the cytoskeleton and with postsynaptic membrane receptors including NMDA and glutamate receptors. They are crucial in the construction and organization of the PSD and dendritic spines of excitatory synapses. There are three members of this family (Shank1, Shank2, Shank3) which show distinct and cell-type specific patterns of expression. Shank1 is brain-specific; Shank2 is found in neurons, glia, endocrine cells, liver, and kidney; Shank3 is widely expressed. The SH3 domain of Shank binds GRIP, a scaffold protein that binds AMPA receptors and Eph receptors/ligands. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212766  Cd Length: 50  Bit Score: 48.20  E-value: 2.45e-07
                         10        20        30
                 ....*....|....*....|....*....|....
gi 221476505  20 ELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPS 53
Cdd:cd11832   15 EISLHKGDRVKVLSIGEGGFWEGSVRGRTGWFPS 48
SH3_Intersectin1_4 cd11993
Fourth Src homology 3 domain (or SH3D) of Intersectin-1; Intersectin-1 (ITSN1) is an adaptor ...
3-56 2.50e-07

Fourth Src homology 3 domain (or SH3D) of Intersectin-1; Intersectin-1 (ITSN1) is an adaptor protein that functions in exo- and endocytosis, actin cytoskeletal reorganization, and signal transduction. It plays a role in clathrin-coated pit (CCP) formation. It binds to many proteins through its multidomain structure and facilitate the assembly of multimeric complexes. ITSN1 localizes in membranous organelles, CCPs, the Golgi complex, and may be involved in the cell membrane trafficking system. It exists in alternatively spliced short and long isoforms. The short isoform contains two Eps15 homology domains (EH1 and EH2), a coiled-coil region and five SH3 domains (SH3A-E), while the long isoform, in addition, contains RhoGEF (also called Dbl-homologous or DH), Pleckstrin homology (PH) and C2 domains. The fourth SH3 domain (or SH3D) of ITSN1 has been shown to bind SHIP2, Numb, CdGAP, and N-WASP. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212926  Cd Length: 65  Bit Score: 48.58  E-value: 2.50e-07
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*....
gi 221476505   3 QPLVVQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDK-----TGWFPSNYV 56
Cdd:cd11993    2 KPEIAQVIASYTATGPEQLTLAPGQLILIRKKNPGGWWEGELQARgkkrqIGWFPANYV 60
SH3_ASEF2 cd11974
Src homology 3 domain of APC-Stimulated guanine nucleotide Exchange Factor 2; ASEF2, also ...
8-56 3.03e-07

Src homology 3 domain of APC-Stimulated guanine nucleotide Exchange Factor 2; ASEF2, also called Spermatogenesis-associated protein 13 (SPATA13), is a GEF that localizes with actin at the leading edge of cells and is important in cell migration and adhesion dynamics. GEFs activate small GTPases by exchanging bound GDP for free GTP. ASEF2 can activate both Rac 1 and Cdc42, but only Rac1 activation is necessary for increased cell migration and adhesion turnover. Together with APC (adenomatous polyposis coli) and Neurabin2, a scaffold protein that binds F-actin, it is involved in regulating HGF-induced cell migration. ASEF2 contains a SH3 domain followed by RhoGEF (also called Dbl-homologous or DH) and Pleckstrin Homology (PH) domains. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212907  Cd Length: 54  Bit Score: 48.14  E-value: 3.03e-07
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*....
gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11974    4 EALWDHVTMDDQELAFKAGDVIRVLEASNKDWWWGRNEDREAWFPASFV 52
SH3_SH3RF2_2 cd11932
Second Src Homology 3 domain of SH3 domain containing ring finger 2; SH3RF2 is also called ...
17-56 3.05e-07

Second Src Homology 3 domain of SH3 domain containing ring finger 2; SH3RF2 is also called POSHER (POSH-eliminating RING protein) or HEPP1 (heart protein phosphatase 1-binding protein). It acts as an anti-apoptotic regulator of the JNK pathway by binding to and promoting the degradation of SH3RF1 (or POSH), a scaffold protein that is required for pro-apoptotic JNK activation. It may also play a role in cardiac functions together with protein phosphatase 1. SH3RF2 contains an N-terminal RING finger domain and three SH3 domains. This model represents the second SH3 domain, located C-terminal of the first SH3 domain at the N-terminal half, of SH3RF2. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212865  Cd Length: 57  Bit Score: 47.91  E-value: 3.05e-07
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|
gi 221476505  17 NNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11932   18 SKDCLKFQKDDIITVISRVDENWAEGKLGDQVGIFPILFV 57
SH3_Sorbs_3 cd11780
Third (or C-terminal) Src Homology 3 domain of Sorbin and SH3 domain containing (Sorbs) ...
8-56 4.02e-07

Third (or C-terminal) Src Homology 3 domain of Sorbin and SH3 domain containing (Sorbs) proteins and similar domains; This family, also called the vinexin family, is composed predominantly of adaptor proteins containing one sorbin homology (SoHo) and three SH3 domains. Members include the third SH3 domains of Sorbs1 (or ponsin), Sorbs2 (or ArgBP2), Vinexin (or Sorbs3), and similar domains. They are involved in the regulation of cytoskeletal organization, cell adhesion, and growth factor signaling. Members of this family bind multiple partners including signaling molecules like c-Abl, c-Arg, Sos, and c-Cbl, as well as cytoskeletal molecules such as vinculin and afadin. They may have overlapping functions. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212714 [Multi-domain]  Cd Length: 55  Bit Score: 47.68  E-value: 4.02e-07
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|..
gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTlNDKT---GWFPSNYV 56
Cdd:cd11780    3 RALYSYTPQNEDELELREGDIVYVMEKCDDGWFVGT-SERTglfGTFPGNYV 53
SH3_CSK cd11769
Src Homology 3 domain of C-terminal Src kinase; CSK is a cytoplasmic (or nonreceptor) tyr ...
9-58 5.24e-07

Src Homology 3 domain of C-terminal Src kinase; CSK is a cytoplasmic (or nonreceptor) tyr kinase containing the Src homology domains, SH3 and SH2, N-terminal to the catalytic tyr kinase domain. They negatively regulate the activity of Src kinases that are anchored to the plasma membrane. To inhibit Src kinases, CSK is translocated to the membrane via binding to specific transmembrane proteins, G-proteins, or adaptor proteins near the membrane. CSK catalyzes the tyr phosphorylation of the regulatory C-terminal tail of Src kinases, resulting in their inactivation. It is expressed in a wide variety of tissues and plays a role, as a regulator of Src, in cell proliferation, survival, and differentiation, and consequently, in cancer development and progression. In addition, CSK also shows Src-independent functions. It is a critical component in G-protein signaling, and plays a role in cytoskeletal reorganization and cell migration. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212703 [Multi-domain]  Cd Length: 57  Bit Score: 47.30  E-value: 5.24e-07
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|..
gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQR-EDGGWWEG-TLNDKTGWFPSNYVNE 58
Cdd:cd11769    6 AKYNFNGASEEDLPFKKGDILTIVAVtKDPNWYKAkNKDGREGMIPANYVQK 57
SH3_SH3RF2_1 cd11929
First Src Homology 3 domain of SH3 domain containing ring finger 2; SH3RF2 is also called ...
8-56 5.67e-07

First Src Homology 3 domain of SH3 domain containing ring finger 2; SH3RF2 is also called POSHER (POSH-eliminating RING protein) or HEPP1 (heart protein phosphatase 1-binding protein). It acts as an anti-apoptotic regulator of the JNK pathway by binding to and promoting the degradation of SH3RF1 (or POSH), a scaffold protein that is required for pro-apoptotic JNK activation. It may also play a role in cardiac functions together with protein phosphatase 1. SH3RF2 contains an N-terminal RING finger domain and three SH3 domains. This model represents the first SH3 domain, located at the N-terminal half, of SH3RF2. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212862  Cd Length: 54  Bit Score: 47.24  E-value: 5.67e-07
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*....
gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11929    4 KALCNYRGHNPGDLKFNKGDVILLRRQLDENWYLGEINGVSGIFPASSV 52
SH3_iASPP cd11952
Src Homology 3 (SH3) domain of Inhibitor of ASPP protein (iASPP); iASPP, also called ...
6-55 6.01e-07

Src Homology 3 (SH3) domain of Inhibitor of ASPP protein (iASPP); iASPP, also called RelA-associated inhibitor (RAI), is an oncoprotein that inhibits the apoptotic transactivation potential of p53. It is upregulated in human breast cancers expressing wild-type p53, in acute leukemias regardless of the p53 mutation status, as well as in ovarian cancer where it is associated with poor patient outcome and chemoresistance. iASPP is also a binding partner and negative regulator of p65RelA, which promotes cell proliferation and inhibits apoptosis; p65RelA has the opposite effect on cell growth compared to the p53 family. It contains a proline-rich region, four ankyrin (ANK) repeats, and an SH3 domain at its C-terminal half. The SH3 domain and the ANK repeats of iASPP contribute to the p53 binding site; they bind to the DNA binding domain of p53. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212885 [Multi-domain]  Cd Length: 56  Bit Score: 47.23  E-value: 6.01e-07
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|..
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQR--EDGGWWEGTLNDKTGWFPSNY 55
Cdd:cd11952    2 VVYALWDYSAEFPDELSFKEGDMVTVLRKdgEGTDWWWASLCGREGYVPRNY 53
SH3_Lasp1_C cd11934
C-terminal Src Homology 3 domain of LIM and SH3 domain protein 1; Lasp1 is a cytoplasmic ...
8-56 6.63e-07

C-terminal Src Homology 3 domain of LIM and SH3 domain protein 1; Lasp1 is a cytoplasmic protein that binds focal adhesion proteins and is involved in cell signaling, migration, and proliferation. It is overexpressed in several cancer cells including breast, ovarian, bladder, and liver. In cancer cells, it can be found in the nucleus; its degree of nuclear localization correlates with tumor size and poor prognosis. Lasp1 is a 36kD protein containing an N-terminal LIM domain, two nebulin repeats, and a C-terminal SH3 domain. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212867 [Multi-domain]  Cd Length: 59  Bit Score: 47.30  E-value: 6.63e-07
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|.
gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTL--NDKTGWFPSNYV 56
Cdd:cd11934    6 RAVYDYNAADEDEVSFQDGDTIVNVQQIDDGWMYGTVerTGDTGMLPANYV 56
SH3_SH3RF3_1 cd11928
First Src Homology 3 domain of SH3 domain containing ring finger 3, an E3 ubiquitin-protein ...
8-56 7.55e-07

First Src Homology 3 domain of SH3 domain containing ring finger 3, an E3 ubiquitin-protein ligase; SH3RF3 is also called POSH2 (Plenty of SH3s 2) or SH3MD4 (SH3 multiple domains protein 4). It is a scaffold protein with E3 ubiquitin-protein ligase activity. It was identified in the screen for interacting partners of p21-activated kinase 2 (PAK2). It may play a role in regulating JNK mediated apoptosis in certain conditions. It also interacts with GTP-loaded Rac1. SH3RF3 is highly homologous to SH3RF1; it also contains an N-terminal RING finger domain and four SH3 domains. This model represents the first SH3 domain, located at the N-terminal half, of SH3RF3. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212861  Cd Length: 54  Bit Score: 46.84  E-value: 7.55e-07
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*....
gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11928    4 KALYSYEGKEPGDLKFNKGDIIILRRKVDENWYHGELNGCHGFLPASYI 52
SH3_Nck_3 cd11767
Third Src Homology 3 domain of Nck adaptor proteins; This group contains the third SH3 domain ...
6-56 7.98e-07

Third Src Homology 3 domain of Nck adaptor proteins; This group contains the third SH3 domain of Nck, the first SH3 domain of Caenorhabditis elegans Ced-2 (Cell death abnormality protein 2), and similar domains. Nck adaptor proteins regulate actin cytoskeleton dynamics by linking proline-rich effector molecules to protein tyrosine kinases and phosphorylated signaling intermediates. They contain three SH3 domains and a C-terminal SH2 domain. They function downstream of the PDGFbeta receptor and are involved in Rho GTPase signaling and actin dynamics. Vertebrates contain two Nck adaptor proteins: Nck1 (also called Nckalpha) and Nck2 (also called Nckbeta or Growth factor receptor-bound protein 4, Grb4), which show partly overlapping functions but also bind distinct targets. Their SH3 domains are involved in recruiting downstream effector molecules, such as the N-WASP/Arp2/3 complex, which when activated induces actin polymerization that results in the production of pedestals, or protrusions of the plasma membrane. The third SH3 domain of Nck appears to prefer ligands with a PxAPxR motif. SH3 domains are protein interaction domains that usually bind to proline-rich ligands with moderate affinity and selectivity, preferentially a PxxP motif. Ced-2 is a cell corpse engulfment protein that interacts with Ced-5 in a pathway that regulates the activation of Ced-10, a Rac small GTPase.


Pssm-ID: 212701 [Multi-domain]  Cd Length: 56  Bit Score: 46.92  E-value: 7.98e-07
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQR--EDGGWWEG-TLNDKTGWFPSNYV 56
Cdd:cd11767    1 VVVALYPFTGENDEELSFEKGERLEIIEKpeDDPDWWKArNALGTTGLVPRNYV 54
SH3_Sorbs2_3 cd11917
Third (or C-terminal) Src Homology 3 domain of Sorbin and SH3 domain containing 2 (Sorbs2), ...
8-56 9.04e-07

Third (or C-terminal) Src Homology 3 domain of Sorbin and SH3 domain containing 2 (Sorbs2), also called Arg-binding protein 2 (ArgBP2); Sorbs2 or ArgBP2 is an adaptor protein containing one sorbin homology (SoHo) and three SH3 domains. It regulates actin-dependent processes including cell adhesion, morphology, and migration. It is expressed in many tissues and is abundant in the heart. Like vinexin, it is found in focal adhesion where it interacts with vinculin and afadin. It also localizes in epithelial cell stress fibers and in cardiac muscle cell Z-discs. Sorbs2 has been implicated to play roles in the signaling of c-Arg, Akt, and Pyk2. Other interaction partners of Sorbs2 include c-Abl, flotillin, spectrin, dynamin 1/2, synaptojanin, PTP-PEST, among others. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212850 [Multi-domain]  Cd Length: 61  Bit Score: 46.91  E-value: 9.04e-07
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|..
gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTlNDKT---GWFPSNYV 56
Cdd:cd11917    8 QALYNYMPRNEDELELREGDVIDVMEKCDDGWFVGT-SRRTkffGTFPGNYV 58
SH3_Intersectin2_2 cd11990
Second Src homology 3 domain (or SH3B) of Intersectin-2; Intersectin-2 (ITSN2) is an adaptor ...
8-56 1.08e-06

Second Src homology 3 domain (or SH3B) of Intersectin-2; Intersectin-2 (ITSN2) is an adaptor protein that functions in exo- and endocytosis, actin cytoskeletal reorganization, and signal transduction. It plays a role in clathrin-coated pit (CCP) formation. It binds to many proteins through its multidomain structure and facilitate the assembly of multimeric complexes. ITSN2 also functions as a specific GEF for Cdc42 activation in epithelial morphogenesis, and is required in mitotic spindle orientation. It exists in alternatively spliced short and long isoforms. The short isoform contains two Eps15 homology domains (EH1 and EH2), a coiled-coil region and five SH3 domains (SH3A-E), while the long isoform, in addition, contains RhoGEF (also called Dbl-homologous or DH), Pleckstrin homology (PH) and C2 domains. The second SH3 domain (or SH3B) of ITSN2 is expected to bind protein partners, similar to ITSN1 which has been shown to bind WNK and CdGAP. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212923 [Multi-domain]  Cd Length: 52  Bit Score: 46.57  E-value: 1.08e-06
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*....
gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQREDGgWWEGTLNDKTGWFPSNYV 56
Cdd:cd11990    3 QALCSWTAKKDNHLNFSKNDIITVLEQQEN-WWFGEVHGGRGWFPKSYV 50
SH3_Vinexin_2 cd11924
Second Src Homology 3 domain of Vinexin, also called Sorbin and SH3 domain containing 3 ...
9-56 1.17e-06

Second Src Homology 3 domain of Vinexin, also called Sorbin and SH3 domain containing 3 (Sorbs3); Vinexin is also called Sorbs3, SH3P3, and SH3-containing adapter molecule 1 (SCAM-1). It is an adaptor protein containing one sorbin homology (SoHo) and three SH3 domains. Vinexin was first identified as a vinculin binding protein; it is co-localized with vinculin at cell-ECM and cell-cell adhesion sites. There are several splice variants of vinexin: alpha, which contains the SoHo and three SH3 domains and displays tissue-specific expression; and beta, which contains only the three SH3 domains and is widely expressed. Vinexin alpha stimulates the accumulation of F-actin at focal contact sites. Vinexin also promotes keratinocyte migration and wound healing. The SH3 domains of vinexin have been reported to bind a number of ligands including vinculin, WAVE2, DLG5, Abl, and Cbl. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212857  Cd Length: 56  Bit Score: 46.50  E-value: 1.17e-06
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|
gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLN--DKTGWFPSNYV 56
Cdd:cd11924    5 AQYTFKGDLEVELSFRKGEHICLIRKVNENWYEGRITgtGRQGIFPASYV 54
PH cd00821
Pleckstrin homology (PH) domain; PH domains have diverse functions, but in general are ...
294-370 1.19e-06

Pleckstrin homology (PH) domain; PH domains have diverse functions, but in general are involved in targeting proteins to the appropriate cellular location or in the interaction with a binding partner. They share little sequence conservation, but all have a common fold, which is electrostatically polarized. Less than 10% of PH domains bind phosphoinositide phosphates (PIPs) with high affinity and specificity. PH domains are distinguished from other PIP-binding domains by their specific high-affinity binding to PIPs with two vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3 which results in targeting some PH domain proteins to the plasma membrane. A few display strong specificity in lipid binding. Any specificity is usually determined by loop regions or insertions in the N-terminus of the domain, which are not conserved across all PH domains. PH domains are found in cellular signaling proteins such as serine/threonine kinase, tyrosine kinases, regulators of G-proteins, endocytotic GTPases, adaptors, as well as cytoskeletal associated molecules and in lipid associated enzymes.


Pssm-ID: 275388 [Multi-domain]  Cd Length: 92  Bit Score: 47.54  E-value: 1.19e-06
                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*..
gi 221476505 294 RDRYFVLFPQTLLFlSVSQRMSAFIYEGKLPLTGIIVNRLEDTDALKNAFEISSPLIDRIVAVCQGPNEANKWVELL 370
Cdd:cd00821   17 KKRWFVLFEGVLLY-YKSKKDSSYKPKGSIPLSGILEVEEVSPKERPHCFELVTPDGRTYYLQADSEEERQEWLKAL 92
RhoGEF67_u2 pfam16614
Unstructured region two on RhoGEF 6 and 7; RhoGEF67_u2 is a region of natively unstructured ...
543-612 1.22e-06

Unstructured region two on RhoGEF 6 and 7; RhoGEF67_u2 is a region of natively unstructured residues on Rho guanine nucleotide exchange factor 6 and 7 proteins. The function is not known. It lies after the PH domain and before the C-terminal coiled-coil.


Pssm-ID: 465200  Cd Length: 99  Bit Score: 47.78  E-value: 1.22e-06
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 221476505  543 WTISCLRPTPPLRPS-----------LLNATSGSGSGSGGSGGGGSSSSNALASYCSGRKNQPTYEEDALVLRVFEAYCA 611
Cdd:pfam16614  14 WSLSCLRPAPPLRPSaalgykermsyILKDTSKSPKTMKKFLPKRKTERKPSEEEFAIRKSTAALEEDAQILKVIEAYCT 93

                  .
gi 221476505  612 A 612
Cdd:pfam16614  94 S 94
SH3_Tks_2 cd12016
Second Src homology 3 domain of Tyrosine kinase substrate (Tks) proteins; Tks proteins are Src ...
11-56 1.42e-06

Second Src homology 3 domain of Tyrosine kinase substrate (Tks) proteins; Tks proteins are Src substrates and scaffolding proteins that play important roles in the formation of podosomes and invadopodia, the dynamic actin-rich structures that are related to cell migration and cancer cell invasion. Vertebrates contain two Tks proteins, Tks4 (Tyr kinase substrate with four SH3 domains) and Tks5 (Tyr kinase substrate with five SH3 domains), which display partially overlapping but non-redundant functions. Both associate with the ADAMs family of transmembrane metalloproteases, which function as sheddases and mediators of cell and matrix interactions. Tks5 interacts with N-WASP and Nck, while Tks4 is essential for the localization of MT1-MMP (membrane-type 1 matrix metalloproteinase) to invadopodia. Tks proteins contain an N-terminal Phox homology (PX) domain and four or five SH3 domains. This model characterizes the second SH3 domain of Tks proteins. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212949  Cd Length: 54  Bit Score: 45.91  E-value: 1.42e-06
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*.
gi 221476505  11 YSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd12016    7 QAYKAENEDEIGFETGVVVEVIQKNLDGWWKIRYQGKEGWAPATYL 52
SH3_Nebulette_C cd11935
C-terminal Src Homology 3 domain of Nebulette and LIM-nebulette (or Lasp2); Nebulette is a ...
6-56 1.44e-06

C-terminal Src Homology 3 domain of Nebulette and LIM-nebulette (or Lasp2); Nebulette is a cardiac-specific protein that localizes to the Z-disc. It interacts with tropomyosin and is important in stabilizing actin thin filaments in cardiac muscles. Polymorphisms in the nebulette gene are associated with dilated cardiomyopathy, with some mutations resulting in severe heart failure. Nebulette is a 107kD protein that contains an N-terminal acidic region, multiple nebulin repeats, and a C-terminal SH3 domain. LIM-nebulette, also called Lasp2 (LIM and SH3 domain protein 2), is an alternatively spliced variant of nebulette. Although it shares a gene with nebulette, Lasp2 is not transcribed from a muscle-specific promoter, giving rise to its multiple tissue expression pattern with highest amounts in the brain. It can crosslink actin filaments and it affects cell spreading. Lasp2 is a 34kD protein containing an N-terminal LIM domain, three nebulin repeats, and a C-terminal SH3 domain. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212868 [Multi-domain]  Cd Length: 58  Bit Score: 46.15  E-value: 1.44e-06
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|...
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTL--NDKTGWFPSNYV 56
Cdd:cd11935    2 TYRAMYDYSAQDEDEVSFRDGDYIVNVQPIDEGWMYGTVqrTGRTGMLPANYI 54
SH3_GRAP2_N cd11947
N-terminal Src homology 3 domain of GRB2-related adaptor protein 2; GRAP2 is also called GADS ...
8-57 2.42e-06

N-terminal Src homology 3 domain of GRB2-related adaptor protein 2; GRAP2 is also called GADS (GRB2-related adapter downstream of Shc), GrpL, GRB2L, Mona, or GRID (Grb2-related protein with insert domain). It is expressed specifically in the hematopoietic system. It plays an important role in T cell receptor (TCR) signaling by promoting the formation of the SLP-76:LAT complex, which couples the TCR to the Ras pathway. It also have roles in antigen-receptor and tyrosine kinase mediated signaling. GRAP2 is unique from other GRB2-like adaptor proteins in that it can be regulated by caspase cleavage. It contains an N-terminal SH3 domain, a central SH2 domain, and a C-terminal SH3 domain. The N-terminal SH3 domain of the related protein GRB2 binds to Sos and Sos-derived proline-rich peptides. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212880 [Multi-domain]  Cd Length: 52  Bit Score: 45.56  E-value: 2.42e-06
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|
gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQREDgGWWEGTLNDKTGWFPSNYVN 57
Cdd:cd11947    3 RGKFDFTASGEDELSFKKGDVLKILSSDD-IWFKAELNGEEGYVPKNFVD 51
SH3_Amphiphysin cd11790
Src Homology 3 domain of Amphiphysin and related domains; Amphiphysins function primarily in ...
7-55 2.44e-06

Src Homology 3 domain of Amphiphysin and related domains; Amphiphysins function primarily in endocytosis and other membrane remodeling events. They exist in several isoforms and mammals possess two amphiphysin proteins from distinct genes. Amphiphysin I proteins, enriched in the brain and nervous system, contain domains that bind clathrin, Adaptor Protein complex 2 (AP2), dynamin, and synaptojanin. They function in synaptic vesicle endocytosis. Human autoantibodies to amphiphysin I hinder GABAergic signaling and contribute to the pathogenesis of paraneoplastic stiff-person syndrome. Some amphiphysin II isoforms, also called Bridging integrator 1 (Bin1), are localized in many different tissues and may function in intracellular vesicle trafficking. In skeletal muscle, Bin1 plays a role in the organization and maintenance of the T-tubule network. Mutations in Bin1 are associated with autosomal recessive centronuclear myopathy. Amphiphysins contain an N-terminal BAR domain with an additional N-terminal amphipathic helix (an N-BAR), a variable central domain, and a C-terminal SH3 domain. The SH3 domain of amphiphysins bind proline-rich motifs present in binding partners such as dynamin, synaptojanin, and nsP3. It also belongs to a subset of SH3 domains that bind ubiquitin in a site that overlaps with the peptide binding site. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212724 [Multi-domain]  Cd Length: 64  Bit Score: 45.78  E-value: 2.44e-06
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gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVT-----QREDGGWWEGTLNDKT--GWFPSNY 55
Cdd:cd11790    5 VRATHDYTAEDTDELTFEKGDVILVIpfddpEEQDEGWLMGVKESTGcrGVFPENF 60
SH3_RUSC1_like cd11810
Src homology 3 domain of RUN and SH3 domain-containing proteins 1 and 2; RUSC1 and RUSC2, that ...
6-55 2.84e-06

Src homology 3 domain of RUN and SH3 domain-containing proteins 1 and 2; RUSC1 and RUSC2, that were originally characterized in silico. They are adaptor proteins consisting of RUN, leucine zipper, and SH3 domains. RUSC1, also called NESCA (New molecule containing SH3 at the carboxy-terminus), is highly expressed in the brain and is translocated to the nuclear membrane from the cytoplasm upon stimulation with neurotrophin. It plays a role in facilitating neurotrophin-dependent neurite outgrowth. It also interacts with NEMO (or IKKgamma) and may function in NEMO-mediated activation of NF-kB. RUSC2, also called Iporin, is expressed ubiquitously with highest amounts in the brain and testis. It interacts with the small GTPase Rab1 and the Golgi matrix protein GM130, and may function in linking GTPases to certain intracellular signaling pathways. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212744  Cd Length: 50  Bit Score: 45.13  E-value: 2.84e-06
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gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNY 55
Cdd:cd11810    1 VVRALCHHVATDSGQLSFRKGDILRVIARVDDDWLLCTRGSTKGLVPLSY 50
SH3_ASAP1 cd11965
Src homology 3 domain of ArfGAP with SH3 domain, ankyrin repeat and PH domain containing ...
7-57 2.92e-06

Src homology 3 domain of ArfGAP with SH3 domain, ankyrin repeat and PH domain containing protein 1; ASAP1 is also called DDEF1 (Development and Differentiation Enhancing Factor 1), AMAP1, centaurin beta-4, or PAG2. an Arf GTPase activating protein (GAP) with activity towards Arf1 and Arf5 but not Arf6. However, it has been shown to bind GTP-Arf6 stably without GAP activity. It has been implicated in cell growth, migration, and survival, as well as in tumor invasion and malignancy. It binds paxillin and cortactin, two components of invadopodia which are essential for tumor invasiveness. It also binds focal adhesion kinase (FAK) and the SH2/SH3 adaptor CrkL. ASAP1 contains an N-terminal BAR domain, followed by a Pleckstrin homology (PH) domain, an Arf GAP domain, ankyrin (ANK) repeats, and a C-terminal SH3 domain. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212898 [Multi-domain]  Cd Length: 57  Bit Score: 45.38  E-value: 2.92e-06
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gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLN---DKTGWFPSNYVN 57
Cdd:cd11965    2 VKTIYDCQADNDDELTFVEGEVIIVTGEEDQEWWIGHIEgqpERKGVFPVSFVH 55
SH3_Vinexin_3 cd11918
Third (or C-terminal) Src Homology 3 domain of Vinexin, also called Sorbin and SH3 domain ...
8-56 2.98e-06

Third (or C-terminal) Src Homology 3 domain of Vinexin, also called Sorbin and SH3 domain containing 3 (Sorbs3); Vinexin is also called Sorbs3, SH3P3, and SH3-containing adapter molecule 1 (SCAM-1). It is an adaptor protein containing one sorbin homology (SoHo) and three SH3 domains. Vinexin was first identified as a vinculin binding protein; it is co-localized with vinculin at cell-ECM and cell-cell adhesion sites. There are several splice variants of vinexin: alpha, which contains the SoHo and three SH3 domains and displays tissue-specific expression; and beta, which contains only the three SH3 domains and is widely expressed. Vinexin alpha stimulates the accumulation of F-actin at focal contact sites. Vinexin also promotes keratinocyte migration and wound healing. The SH3 domains of vinexin have been reported to bind a number of ligands including vinculin, WAVE2, DLG5, Abl, and Cbl. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212851 [Multi-domain]  Cd Length: 58  Bit Score: 45.33  E-value: 2.98e-06
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gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGT--LNDKTGWFPSNYV 56
Cdd:cd11918    5 KAVYQYRPQNEDELELREGDRVDVMQQCDDGWFVGVsrRTQKFGTFPGNYV 55
SH3_Sorbs2_1 cd11920
First Src Homology 3 domain of Sorbin and SH3 domain containing 2 (Sorbs2), also called ...
5-58 3.08e-06

First Src Homology 3 domain of Sorbin and SH3 domain containing 2 (Sorbs2), also called Arg-binding protein 2 (ArgBP2); Sorbs2 or ArgBP2 is an adaptor protein containing one sorbin homology (SoHo) and three SH3 domains. It regulates actin-dependent processes including cell adhesion, morphology, and migration. It is expressed in many tissues and is abundant in the heart. Like vinexin, it is found in focal adhesion where it interacts with vinculin and afadin. It also localizes in epithelial cell stress fibers and in cardiac muscle cell Z-discs. Sorbs2 has been implicated to play roles in the signaling of c-Arg, Akt, and Pyk2. Other interaction partners of Sorbs2 include c-Abl, flotillin, spectrin, dynamin 1/2, synaptojanin, PTP-PEST, among others. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212853 [Multi-domain]  Cd Length: 55  Bit Score: 45.39  E-value: 3.08e-06
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gi 221476505   5 LVVQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd11920    1 LPARAVYDFKAQTSKELSFKKGDTVYILRKIDQNWYEGEHHGRVGIFPISYVEK 54
SH3_PSTPIP1 cd11824
Src homology 3 domain of Proline-Serine-Threonine Phosphatase-Interacting Protein 1; PSTPIP1, ...
8-56 3.24e-06

Src homology 3 domain of Proline-Serine-Threonine Phosphatase-Interacting Protein 1; PSTPIP1, also called CD2 Binding Protein 1 (CD2BP1), is mainly expressed in hematopoietic cells. It is a binding partner of the cell surface receptor CD2 and PTP-PEST, a tyrosine phosphatase which functions in cell motility and Rac1 regulation. It also plays a role in the activation of the Wiskott-Aldrich syndrome protein (WASP), which couples actin rearrangement and T cell activation. Mutations in the gene encoding PSTPIP1 cause the autoinflammatory disorder known as PAPA (pyogenic sterile arthritis, pyoderma gangrenosum, and acne) syndrome. PSTPIP1 contains an N-terminal F-BAR domain, PEST motifs, and a C-terminal SH3 domain. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212758 [Multi-domain]  Cd Length: 53  Bit Score: 45.06  E-value: 3.24e-06
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gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11824    3 SVLYDYTAQEDDELSISKGDVVAVIEKGEDGWWTVERNGQKGLVPGTYL 51
SH3_ASAP2 cd11966
Src homology 3 domain of ArfGAP with SH3 domain, ankyrin repeat and PH domain containing ...
7-57 3.31e-06

Src homology 3 domain of ArfGAP with SH3 domain, ankyrin repeat and PH domain containing protein 2; ASAP2 is also called DDEF2 (Development and Differentiation Enhancing Factor 2), AMAP2, centaurin beta-3, or PAG3. It mediates the functions of Arf GTPases vial dual mechanisms: it exhibits GTPase activating protein (GAP) activity towards class I (Arf1) and II (Arf5) Arfs; and it binds class III Arfs (GTP-Arf6) stably without GAP activity. It binds paxillin and is implicated in Fcgamma receptor-mediated phagocytosis in macrophages and in cell migration. ASAP2 contains an N-terminal BAR domain, followed by a Pleckstrin homology (PH) domain, an Arf GAP domain, ankyrin (ANK) repeats, and a C-terminal SH3 domain. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212899  Cd Length: 56  Bit Score: 45.33  E-value: 3.31e-06
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gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLN---DKTGWFPSNYVN 57
Cdd:cd11966    2 VKALYNCVADNPDELTFSEGEIIIVDGEEDKEWWIGHIDgepTRRGAFPVSFVH 55
SH3_srGAP1-3 cd11955
Src homology 3 domain of Slit-Robo GTPase Activating Proteins 1, 2, and 3; srGAP1, also called ...
9-56 3.59e-06

Src homology 3 domain of Slit-Robo GTPase Activating Proteins 1, 2, and 3; srGAP1, also called Rho GTPase-Activating Protein 13 (ARHGAP13), is a Cdc42- and RhoA-specific GAP and is expressed later in the development of central nervous system tissues. srGAP2 is expressed in zones of neuronal differentiation. It plays a role in the regeneration of neurons and axons. srGAP3, also called MEGAP (MEntal disorder associated GTPase-Activating Protein), is a Rho GAP with activity towards Rac1 and Cdc42. It impacts cell migration by regulating actin and microtubule cytoskeletal dynamics. The association between srGAP3 haploinsufficiency and mental retardation is under debate. srGAPs are Rho GAPs that interact with Robo1, the transmembrane receptor of Slit proteins. Slit proteins are secreted proteins that control axon guidance and the migration of neurons and leukocytes. srGAPs contain an N-terminal F-BAR domain, a Rho GAP domain, and a C-terminal SH3 domain. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212888 [Multi-domain]  Cd Length: 53  Bit Score: 44.93  E-value: 3.59e-06
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gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11955    4 AKFDYVGRSARELSFKKGASLLLYHRASDDWWEGRHNGIDGLVPHQYI 51
SH3_Tks5_1 cd12074
First Src homology 3 domain of Tyrosine kinase substrate with five SH3 domains; Tks5, also ...
6-57 3.97e-06

First Src homology 3 domain of Tyrosine kinase substrate with five SH3 domains; Tks5, also called SH3 and PX domain-containing protein 2A (SH3PXD2A) or Five SH (FISH), is a scaffolding protein and Src substrate that is localized in podosomes, which are electron-dense structures found in Src-transformed fibroblasts, osteoclasts, macrophages, and some invasive cancer cells. It binds and regulates some members of the ADAMs family of transmembrane metalloproteases, which function as sheddases and mediators of cell and matrix interactions. It is required for podosome formation, degradation of the extracellular matrix, and cancer cell invasion. Tks5 contains an N-terminal Phox homology (PX) domain and five SH3 domains. This model characterizes the first SH3 domain of Tks5. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 213007 [Multi-domain]  Cd Length: 53  Bit Score: 44.70  E-value: 3.97e-06
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gi 221476505   6 VVQAEYSfmGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVN 57
Cdd:cd12074    3 VVVSNYE--KQENSEISLQAGEVVDVIEKNESGWWFVSTAEEQGWVPATYLE 52
PH_SOS cd01261
Son of Sevenless (SOS) Pleckstrin homology (PH) domain; SOS is a Ras guanine nucleotide ...
295-366 4.29e-06

Son of Sevenless (SOS) Pleckstrin homology (PH) domain; SOS is a Ras guanine nucleotide exchange factor. SOS is thought to transmit signals from activated receptor tyrosine kinases to the Ras signaling pathway. SOS contains a histone domain, Dbl-homology (DH), a PH domain, Rem domain, Cdc25 domain, and a Grb2 binding domain. The SOS PH domain binds to phosphatidylinositol-4,5-bisphosphate (PIP2) and phosphatidic acid (PA). SOS is dependent on Ras binding to the allosteric site via its histone domain for both a lower level of activity (Ras GDP) and maximal activity (Ras GTP). The DH domain blocks the allosteric Ras binding site in SOS. The PH domain is closely associated with the DH domain and the action of the DH-PH unit gates a reciprocal interaction between Ras and SOS. The C-terminal proline-rich domain of SOS binds to the adapter protein Grb2 which localizes the Sos protein to the plasma membrane and diminishes the negative effect of the C-terminal domain on the guanine nucleotide exchange activity of the CDC25-homology domain of SOS. PH domains have diverse functions, but in general are involved in targeting proteins to the appropriate cellular location or in the interaction with a binding partner. They share little sequence conservation, but all have a common fold, which is electrostatically polarized. Less than 10% of PH domains bind phosphoinositide phosphates (PIPs) with high affinity and specificity. PH domains are distinguished from other PIP-binding domains by their specific high-affinity binding to PIPs with two vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3 which results in targeting some PH domain proteins to the plasma membrane. A few display strong specificity in lipid binding. Any specificity is usually determined by loop regions or insertions in the N-terminus of the domain, which are not conserved across all PH domains. PH domains are found in cellular signaling proteins such as serine/threonine kinase, tyrosine kinases, regulators of G-proteins, endocytotic GTPases, adaptors, as well as cytoskeletal associated molecules and in lipid associated enzymes.


Pssm-ID: 269963  Cd Length: 109  Bit Score: 46.58  E-value: 4.29e-06
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gi 221476505 295 DRYFVLFPQTLLFLSVSQRMSA-------FIYEGKLPLTGIIVNRLEDTDALKNAFEISSPLIDRIVAVCQGPNEANKW 366
Cdd:cd01261   23 ERHAFLFDGLLLLCKSNRRRTStggpkpeYRLKEKFFIRKVEINDLEDTEELKNAFEIVPRDQPSVILFAKSAEEKNNW 101
SH3_ARHGEF16_26 cd11938
Src homology 3 domain of the Rho guanine nucleotide exchange factors ARHGEF16 and ARHGEF26; ...
7-58 4.38e-06

Src homology 3 domain of the Rho guanine nucleotide exchange factors ARHGEF16 and ARHGEF26; ARHGEF16, also called ephexin-4, acts as a GEF for RhoG, activating it by exchanging bound GDP for free GTP. RhoG is a small GTPase that is a crucial regulator of Rac in migrating cells. ARHGEF16 interacts directly with the ephrin receptor EphA2 and mediates cell migration and invasion in breast cancer cells by activating RhoG. ARHGEF26, also called SGEF (SH3 domain-containing guanine exchange factor), also activates RhoG. It is highly expressed in liver and may play a role in regulating membrane dynamics. ARHGEF16 and ARHGEF26 contain RhoGEF (also called Dbl-homologous or DH), Pleckstrin Homology (PH), and SH3 domains. The SH3 domains of ARHGEFs play an autoinhibitory role through intramolecular interactions with a proline-rich region N-terminal to the DH domain. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212871  Cd Length: 55  Bit Score: 44.83  E-value: 4.38e-06
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gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGT-LND-KTGWFPSNYVNE 58
Cdd:cd11938    2 VEIIKAYTAKQPDELSLQQADVVLVLQTESDGWYYGErLRDgERGWFPSSCAKE 55
SH3_FCHSD1_2 cd11895
Second Src Homology 3 domain of FCH and double SH3 domains protein 1; FCHSD1 has a domain ...
6-58 4.61e-06

Second Src Homology 3 domain of FCH and double SH3 domains protein 1; FCHSD1 has a domain structure consisting of an N-terminal F-BAR (FES-CIP4 Homology and Bin/Amphiphysin/Rvs), two SH3, and C-terminal proline-rich domains. It has only been characterized in silico and its function is unknown. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212828  Cd Length: 58  Bit Score: 44.96  E-value: 4.61e-06
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gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQR-EDG---GWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd11895    1 LARALYSYTGQSPEELSFPEGALIRLLPRaQDGvddGFWRGEFGGRVGVFPSLLVEE 57
SH3_Yes cd12007
Src homology 3 domain of Yes Protein Tyrosine Kinase; Yes (or c-Yes) is a member of the Src ...
9-56 4.75e-06

Src homology 3 domain of Yes Protein Tyrosine Kinase; Yes (or c-Yes) is a member of the Src subfamily of proteins, which are cytoplasmic (or non-receptor) PTKs. c-Yes kinase is the cellular homolog of the oncogenic protein (v-Yes) encoded by the Yamaguchi 73 and Esh sarcoma viruses. It displays functional overlap with other Src subfamily members, particularly Src. It also shows some unique functions such as binding to occludins, transmembrane proteins that regulate extracellular interactions in tight junctions. Yes also associates with a number of proteins in different cell types that Src does not interact with, like JAK2 and gp130 in pre-adipocytes, and Pyk2 in treated pulmonary vein endothelial cells. Although the biological function of Yes remains unclear, it appears to have a role in regulating cell-cell interactions and vesicle trafficking in polarized cells. Src kinases contain an N-terminal SH4 domain with a myristoylation site, followed by SH3 and SH2 domains, a tyr kinase domain, and a regulatory C-terminal region containing a conserved tyr. They are activated by autophosphorylation at the tyr kinase domain, but are negatively regulated by phosphorylation at the C-terminal tyr by Csk (C-terminal Src Kinase). The SH3 domain of Src kinases contributes to substrate recruitment by binding adaptor proteins/substrates, and regulation of kinase activity through an intramolecular interaction. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212940 [Multi-domain]  Cd Length: 58  Bit Score: 44.64  E-value: 4.75e-06
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gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQREDGGWWEG--TLNDKTGWFPSNYV 56
Cdd:cd12007    5 ALYDYEARTTEDLSFKKGERFQIINNTEGDWWEArsIATGKNGYIPSNYV 54
SH3_SH3RF1_1 cd11927
First Src Homology 3 domain of SH3 domain containing ring finger protein 1, an E3 ...
8-56 5.02e-06

First Src Homology 3 domain of SH3 domain containing ring finger protein 1, an E3 ubiquitin-protein ligase; SH3RF1 is also called POSH (Plenty of SH3s) or SH3MD2 (SH3 multiple domains protein 2). It is a scaffold protein that acts as an E3 ubiquitin-protein ligase. It plays a role in calcium homeostasis through the control of the ubiquitin domain protein Herp. It may also have a role in regulating death receptor mediated and JNK mediated apoptosis. SH3RF1 also enhances the ubiquitination of ROMK1 potassium channel resulting in its increased endocytosis. It contains an N-terminal RING finger domain and four SH3 domains. This model represents the first SH3 domain, located at the N-terminal half, of SH3RF1. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212860  Cd Length: 54  Bit Score: 44.56  E-value: 5.02e-06
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gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11927    4 KALYNYEGKEPGDLKFSKGDIIILRRQVDENWYHGEVNGIHGFFPTNFV 52
SH3_PRMT2 cd11806
Src homology 3 domain of Protein arginine N-methyltransferase 2; PRMT2, also called HRMT1L1, ...
6-56 5.39e-06

Src homology 3 domain of Protein arginine N-methyltransferase 2; PRMT2, also called HRMT1L1, belongs to the arginine methyltransferase protein family. It functions as a coactivator to both estrogen receptor alpha (ER-alpha) and androgen receptor (AR), presumably through arginine methylation. The ER-alpha transcription factor is involved in cell proliferation, differentiation, morphogenesis, and apoptosis, and is also implicated in the development and progression of breast cancer. PRMT2 and its variants are upregulated in breast cancer cells and may be involved in modulating the ER-alpha signaling pathway during formation of breast cancer. PRMT2 also plays a role in regulating the function of E2F transcription factors, which are critical cell cycle regulators, by binding to the retinoblastoma gene product (RB). It contains an N-terminal SH3 domain and an AdoMet binding domain. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212740 [Multi-domain]  Cd Length: 53  Bit Score: 44.30  E-value: 5.39e-06
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gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11806    1 EYVAIADFVATDDSQLSFESGDKLLVLRKPSVDWWWAEHNGCCGYIPASHL 51
SH3_Irsp53_BAIAP2L cd11779
Src Homology 3 domain of Insulin Receptor tyrosine kinase Substrate p53, Brain-specific ...
7-57 5.45e-06

Src Homology 3 domain of Insulin Receptor tyrosine kinase Substrate p53, Brain-specific Angiogenesis Inhibitor 1-Associated Protein 2 (BAIAP2)-Like proteins, and similar proteins; Proteins in this family include IRSp53, BAIAP2L1, BAIAP2L2, and similar proteins. They all contain an Inverse-Bin/Amphiphysin/Rvs (I-BAR) or IMD domain in addition to the SH3 domain. IRSp53, also known as BAIAP2, is a scaffolding protein that takes part in many signaling pathways including Cdc42-induced filopodia formation, Rac-mediated lamellipodia extension, and spine morphogenesis. IRSp53 exists as multiple splicing variants that differ mainly at the C-termini. BAIAP2L1, also called IRTKS (Insulin Receptor Tyrosine Kinase Substrate), serves as a substrate for the insulin receptor and binds the small GTPase Rac. It plays a role in regulating the actin cytoskeleton and colocalizes with F-actin, cortactin, VASP, and vinculin. IRSp53 and IRTKS also mediate the recruitment of effector proteins Tir and EspFu, which regulate host cell actin reorganization, to bacterial attachment sites. BAIAP2L2 co-localizes with clathrin plaques but its function has not been determined. The SH3 domains of IRSp53 and IRTKS have been shown to bind the proline-rich C-terminus of EspFu. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212713 [Multi-domain]  Cd Length: 57  Bit Score: 44.62  E-value: 5.45e-06
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gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVIT-VTQREDGGWWEGTlNDKT---GWFPSNYVN 57
Cdd:cd11779    3 VKALYPHAAGGETQLSFEEGDVITlLGPEPRDGWHYGE-NERSgrrGWFPIAYTE 56
SH3_Vinexin_1 cd11921
First Src Homology 3 domain of Vinexin, also called Sorbin and SH3 domain containing 3 (Sorbs3) ...
8-56 6.51e-06

First Src Homology 3 domain of Vinexin, also called Sorbin and SH3 domain containing 3 (Sorbs3); Vinexin is also called Sorbs3, SH3P3, and SH3-containing adapter molecule 1 (SCAM-1). It is an adaptor protein containing one sorbin homology (SoHo) and three SH3 domains. Vinexin was first identified as a vinculin binding protein; it is co-localized with vinculin at cell-ECM and cell-cell adhesion sites. There are several splice variants of vinexin: alpha, which contains the SoHo and three SH3 domains and displays tissue-specific expression; and beta, which contains only the three SH3 domains and is widely expressed. Vinexin alpha stimulates the accumulation of F-actin at focal contact sites. Vinexin also promotes keratinocyte migration and wound healing. The SH3 domains of vinexin have been reported to bind a number of ligands including vinculin, WAVE2, DLG5, Abl, and Cbl. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212854  Cd Length: 55  Bit Score: 44.14  E-value: 6.51e-06
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*....
gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11921    4 RLKFDFQAQSPKELTLQKGDIVYIHKEVDKNWLEGEHHGRVGIFPANYV 52
SH3_SKAP1 cd12044
Src Homology 3 domain of Src Kinase-Associated Phosphoprotein 1; SKAP1, also called SKAP55 ...
8-56 6.54e-06

Src Homology 3 domain of Src Kinase-Associated Phosphoprotein 1; SKAP1, also called SKAP55 (Src kinase-associated protein of 55kDa), is an immune cell-specific adaptor protein that plays an important role in T-cell adhesion, migration, and integrin clustering. It is expressed exclusively in T-lymphocytes, mast cells, and macrophages. Binding partners include ADAP (adhesion and degranulation-promoting adaptor protein), Fyn, Riam, RapL, and RasGRP. It contains a pleckstrin homology (PH) domain, a C-terminal SH3 domain, and several tyrosine phosphorylation sites. The SH3 domain of SKAP1 is necessary for its ability to regulate T-cell conjugation with antigen-presenting cells and the formation of LFA-1 clusters. SKAP1 binds primarily to a proline-rich region of ADAP through its SH3 domain; its degradation is regulated by ADAP. A secondary interaction occurs via the ADAP SH3 domain and the RKxxYxxY motif in SKAP1. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212977  Cd Length: 53  Bit Score: 44.08  E-value: 6.54e-06
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|.
gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQREDG--GWWEGTLNDKTGWFPSNYV 56
Cdd:cd12044    3 QGLWDCFGDNPDELSFQRGDLIYILSKEYNmyGWWVGELNGIVGIVPKDYL 53
SH3_Tks_3 cd12017
Third Src homology 3 domain of Tyrosine kinase substrate (Tks) proteins; Tks proteins are Src ...
13-58 7.35e-06

Third Src homology 3 domain of Tyrosine kinase substrate (Tks) proteins; Tks proteins are Src substrates and scaffolding proteins that play important roles in the formation of podosomes and invadopodia, the dynamic actin-rich structures that are related to cell migration and cancer cell invasion. Vertebrates contain two Tks proteins, Tks4 (Tyr kinase substrate with four SH3 domains) and Tks5 (Tyr kinase substrate with five SH3 domains), which display partially overlapping but non-redundant functions. Both associate with the ADAMs family of transmembrane metalloproteases, which function as sheddases and mediators of cell and matrix interactions. Tks5 interacts with N-WASP and Nck, while Tks4 is essential for the localization of MT1-MMP (membrane-type 1 matrix metalloproteinase) to invadopodia. Tks proteins contain an N-terminal Phox homology (PX) domain and four or five SH3 domains. This model characterizes the third SH3 domain of Tks proteins. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212950  Cd Length: 53  Bit Score: 43.98  E-value: 7.35e-06
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*.
gi 221476505  13 FMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd12017    8 FQATIQDGISFQKGQKVEVIDKNPSGWWYVKIDGKEGWAPSSYIEK 53
SH3_Shank1 cd11982
Src homology 3 domain of SH3 and multiple ankyrin repeat domains protein 1; Shank1, also ...
12-56 8.16e-06

Src homology 3 domain of SH3 and multiple ankyrin repeat domains protein 1; Shank1, also called SSTRIP (Somatostatin receptor-interacting protein), is a brain-specific protein that plays a role in the construction of postsynaptic density (PSD) and the maturation of dendritic spines. Mice deficient in Shank1 show altered PSD composition, thinner PSDs, smaller dendritic spines, and weaker basal synaptic transmission, although synaptic plasticity is normal. They show increased anxiety and impaired fear memory, but also show better spatial learning. Shank proteins carry scaffolding functions through multiple sites of protein-protein interaction in its domain architecture, including ankyrin (ANK) repeats, a long proline rich region, as well as SH3, PDZ, and SAM domains. The SH3 domain of Shank binds GRIP, a scaffold protein that binds AMPA receptors and Eph receptors/ligands. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212915 [Multi-domain]  Cd Length: 52  Bit Score: 43.85  E-value: 8.16e-06
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gi 221476505  12 SFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11982    8 PYQSQAEGEISLSKGEKIKVLSVGEGGFWEGQVKGRVGWFPSDCV 52
SH3_SH3RF1_2 cd11930
Second Src Homology 3 domain of SH3 domain containing ring finger protein 1, an E3 ...
16-56 9.85e-06

Second Src Homology 3 domain of SH3 domain containing ring finger protein 1, an E3 ubiquitin-protein ligase; SH3RF1 is also called POSH (Plenty of SH3s) or SH3MD2 (SH3 multiple domains protein 2). It is a scaffold protein that acts as an E3 ubiquitin-protein ligase. It plays a role in calcium homeostasis through the control of the ubiquitin domain protein Herp. It may also have a role in regulating death receptor mediated and JNK mediated apoptosis. SH3RF1 also enhances the ubiquitination of ROMK1 potassium channel resulting in its increased endocytosis. It contains an N-terminal RING finger domain and four SH3 domains. This model represents the second SH3 domain, located C-terminal of the first SH3 domain at the N-terminal half, of SH3RF1. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212863  Cd Length: 55  Bit Score: 43.83  E-value: 9.85e-06
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gi 221476505  16 SNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11930   15 ADKDCLPFAKDDILTVIRRVDENWAEGMLGDKIGIFPISYV 55
SH3_Tks4_2 cd12076
Second Src homology 3 domain of Tyrosine kinase substrate with four SH3 domains; Tks4, also ...
11-58 9.91e-06

Second Src homology 3 domain of Tyrosine kinase substrate with four SH3 domains; Tks4, also called SH3 and PX domain-containing protein 2B (SH3PXD2B) or HOFI, is a Src substrate and scaffolding protein that plays an important role in the formation of podosomes and invadopodia, the dynamic actin-rich structures that are related to cell migration and cancer cell invasion. It is required in the formation of functional podosomes, EGF-induced membrane ruffling, and lamellipodia generation. It plays an important role in cellular attachment and cell spreading. Tks4 is essential for the localization of MT1-MMP (membrane-type 1 matrix metalloproteinase) to invadopodia. It contains an N-terminal Phox homology (PX) domain and four SH3 domains. This model characterizes the second SH3 domain of Tks4. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 213009 [Multi-domain]  Cd Length: 54  Bit Score: 43.87  E-value: 9.91e-06
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                 ....*....|....*....|....*....|....*....|....*...
gi 221476505  11 YSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd12076    7 YPYTARDQDEINLEKGAVVEVIQKNLEGWWKIRYQGKEGWAPASYLKK 54
SH3_ASEF cd11973
Src homology 3 domain of APC-Stimulated guanine nucleotide Exchange Factor; ASEF, also called ...
8-56 1.02e-05

Src homology 3 domain of APC-Stimulated guanine nucleotide Exchange Factor; ASEF, also called ARHGEF4, exists in an autoinhibited form and is activated upon binding of the tumor suppressor APC (adenomatous polyposis coli). GEFs activate small GTPases by exchanging bound GDP for free GTP. ASEF can activate Rac1 or Cdc42. Truncated ASEF, which is found in colorectal cancers, is constitutively active and has been shown to promote angiogenesis and cancer cell migration. ASEF contains a SH3 domain followed by RhoGEF (also called Dbl-homologous or DH) and Pleckstrin Homology (PH) domains. In its autoinhibited form, the SH3 domain of ASEF forms an extensive interface with the DH and PH domains, blocking the Rac binding site. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212906 [Multi-domain]  Cd Length: 73  Bit Score: 44.24  E-value: 1.02e-05
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gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11973   21 EALWDHVTMDDQELGFKAGDVIEVMDATNKEWWWGRVLDSEGWFPASFV 69
SH3_Lyn cd12004
Src homology 3 domain of Lyn Protein Tyrosine Kinase; Lyn is a member of the Src subfamily of ...
6-58 1.08e-05

Src homology 3 domain of Lyn Protein Tyrosine Kinase; Lyn is a member of the Src subfamily of proteins, which are cytoplasmic (or non-receptor) PTKs. Lyn is expressed in B lymphocytes and myeloid cells. It exhibits both positive and negative regulatory roles in B cell receptor (BCR) signaling. Lyn, as well as Fyn and Blk, promotes B cell activation by phosphorylating ITAMs (immunoreceptor tyr activation motifs) in CD19 and in Ig components of BCR. It negatively regulates signaling by its unique ability to phosphorylate ITIMs (immunoreceptor tyr inhibition motifs) in cell surface receptors like CD22 and CD5. Lyn also plays an important role in G-CSF receptor signaling by phosphorylating a variety of adaptor molecules. Src kinases contain an N-terminal SH4 domain with a myristoylation site, followed by SH3 and SH2 domains, a tyr kinase domain, and a regulatory C-terminal region containing a conserved tyr. They are activated by autophosphorylation at the tyr kinase domain, but are negatively regulated by phosphorylation at the C-terminal tyr by Csk (C-terminal Src Kinase). The SH3 domain of Src kinases contributes to substrate recruitment by binding adaptor proteins/substrates, and regulation of kinase activity through an intramolecular interaction. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212937 [Multi-domain]  Cd Length: 56  Bit Score: 43.83  E-value: 1.08e-05
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gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQrEDGGWWEGT--LNDKTGWFPSNYVNE 58
Cdd:cd12004    1 IVVALYPYDGIHEDDLSFKKGEKLKVIE-EHGEWWKARslTTKKEGFIPSNYVAK 54
SH3_Tks5_3 cd12079
Third Src homology 3 domain of Tyrosine kinase substrate with five SH3 domains; Tks5, also ...
9-58 1.11e-05

Third Src homology 3 domain of Tyrosine kinase substrate with five SH3 domains; Tks5, also called SH3 and PX domain-containing protein 2A (SH3PXD2A) or Five SH (FISH), is a scaffolding protein and Src substrate that is localized in podosomes, which are electron-dense structures found in Src-transformed fibroblasts, osteoclasts, macrophages, and some invasive cancer cells. It binds and regulates some members of the ADAMs family of transmembrane metalloproteases, which function as sheddases and mediators of cell and matrix interactions. It is required for podosome formation, degradation of the extracellular matrix, and cancer cell invasion. Tks5 contains an N-terminal Phox homology (PX) domain and five SH3 domains. This model characterizes the third SH3 domain of Tks5. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 213012  Cd Length: 54  Bit Score: 43.50  E-value: 1.11e-05
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gi 221476505   9 AEY----SFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd12079    1 VEYytiaEFQSCISDGISFRGGQKAEVIEKNSGGWWYVQIGEKEGWAPSSYIDK 54
SH3_Sorbs1_1 cd11919
First Src Homology 3 domain of Sorbin and SH3 domain containing 1 (Sorbs1), also called ponsin; ...
8-56 1.16e-05

First Src Homology 3 domain of Sorbin and SH3 domain containing 1 (Sorbs1), also called ponsin; Sorbs1 is also called ponsin, SH3P12, or CAP (c-Cbl associated protein). It is an adaptor protein containing one sorbin homology (SoHo) and three SH3 domains. It binds Cbl and plays a major role in regulating the insulin signaling pathway by enhancing insulin-induced phosphorylation of Cbl. Sorbs1, like vinexin, localizes at cell-ECM and cell-cell adhesion sites where it binds vinculin, paxillin, and afadin. It may function in the control of cell motility. Other interaction partners of Sorbs1 include c-Abl, Sos, flotillin, Grb4, ataxin-7, filamin C, among others. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212852 [Multi-domain]  Cd Length: 55  Bit Score: 43.41  E-value: 1.16e-05
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gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11919    4 RAKFDFKAQTLKELPLQKGDIVYIYKQIDQNWYEGEHHGRVGIFPRSYI 52
SH3_Tks_1 cd12015
First Src homology 3 domain of Tyrosine kinase substrate (Tks) proteins; Tks proteins are Src ...
6-55 1.29e-05

First Src homology 3 domain of Tyrosine kinase substrate (Tks) proteins; Tks proteins are Src substrates and scaffolding proteins that play important roles in the formation of podosomes and invadopodia, the dynamic actin-rich structures that are related to cell migration and cancer cell invasion. Vertebrates contain two Tks proteins, Tks4 (Tyr kinase substrate with four SH3 domains) and Tks5 (Tyr kinase substrate with five SH3 domains), which display partially overlapping but non-redundant functions. Both associate with the ADAMs family of transmembrane metalloproteases, which function as sheddases and mediators of cell and matrix interactions. Tks5 interacts with N-WASP and Nck, while Tks4 is essential for the localization of MT1-MMP (membrane-type 1 matrix metalloproteinase) to invadopodia. Tks proteins contain an N-terminal Phox homology (PX) domain and four or five SH3 domains. This model characterizes the first SH3 domain of Tks proteins. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212948  Cd Length: 53  Bit Score: 43.18  E-value: 1.29e-05
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gi 221476505   6 VVQAEYSfmGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNY 55
Cdd:cd12015    3 VVVADYK--KQQPNEISLRAGDVVDVIEKNENGWWFVSLEDEQGWVPATY 50
SH3_Sorbs2_2 cd11923
Second Src Homology 3 domain of Sorbin and SH3 domain containing 2 (Sorbs2), also called ...
9-57 1.70e-05

Second Src Homology 3 domain of Sorbin and SH3 domain containing 2 (Sorbs2), also called Arg-binding protein 2 (ArgBP2); Sorbs2 or ArgBP2 is an adaptor protein containing one sorbin homology (SoHo) and three SH3 domains. It regulates actin-dependent processes including cell adhesion, morphology, and migration. It is expressed in many tissues and is abundant in the heart. Like vinexin, it is found in focal adhesion where it interacts with vinculin and afadin. It also localizes in epithelial cell stress fibers and in cardiac muscle cell Z-discs. Sorbs2 has been implicated to play roles in the signaling of c-Arg, Akt, and Pyk2. Other interaction partners of Sorbs2 include c-Abl, flotillin, spectrin, dynamin 1/2, synaptojanin, PTP-PEST, among others. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212856 [Multi-domain]  Cd Length: 57  Bit Score: 42.98  E-value: 1.70e-05
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gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTL--NDKTGWFPSNYVN 57
Cdd:cd11923    5 AKYNFNADTNVELSLRKGDRVVLLKQVDQNWYEGKIpgTNRQGIFPVSYVE 55
SH3_BTK cd11906
Src Homology 3 domain of Bruton's tyrosine kinase; BTK is a cytoplasmic (or nonreceptor) tyr ...
6-58 1.81e-05

Src Homology 3 domain of Bruton's tyrosine kinase; BTK is a cytoplasmic (or nonreceptor) tyr kinase containing Src homology protein interaction domains (SH3, SH2) N-terminal to the catalytic tyr kinase domain. It also contains an N-terminal pleckstrin homology (PH) domain, which binds the products of PI3K and allows membrane recruitment and activation, and the Tec homology (TH) domain with proline-rich and zinc-binding regions. Btk is expressed in B-cells, and a variety of myeloid cells including mast cells, platelets, neutrophils, and dendrictic cells. It interacts with a variety of partners, from cytosolic proteins to nuclear transcription factors, suggesting a diversity of functions. Stimulation of a diverse array of cell surface receptors, including antigen engagement of the B-cell receptor (BCR), leads to PH-mediated membrane translocation of Btk and subsequent phosphorylation by Src kinase and activation. Btk plays an important role in the life cycle of B-cells including their development, differentiation, proliferation, survival, and apoptosis. Mutations in Btk cause the primary immunodeficiency disease, X-linked agammaglobulinaemia (XLA) in humans. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212839 [Multi-domain]  Cd Length: 55  Bit Score: 42.89  E-value: 1.81e-05
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gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEG-TLNDKTGWFPSNYVNE 58
Cdd:cd11906    2 KVVALYDYTPMNAQDLQLRKGEEYVILEESNLPWWRArDKNGREGYIPSNYVTE 55
SH3_Brk cd11847
Src homology 3 domain of Brk (Breast tumor kinase) Protein Tyrosine Kinase (PTK), also called ...
9-58 1.90e-05

Src homology 3 domain of Brk (Breast tumor kinase) Protein Tyrosine Kinase (PTK), also called PTK6; Brk is a cytoplasmic (or non-receptor) PTK with limited homology to Src kinases. It has been found to be overexpressed in a majority of breast tumors. It plays roles in normal cell differentiation, proliferation, survival, migration, and cell cycle progression. Brk substrates include RNA-binding proteins (SLM-1/2, Sam68), transcription factors (STAT3/5), and signaling molecules (Akt, paxillin, IRS-4). Src kinases in general contain an N-terminal SH4 domain with a myristoylation site, followed by SH3 and SH2 domains, a tyr kinase domain, and a regulatory C-terminal region containing a conserved tyr; they are activated by autophosphorylation at the tyr kinase domain, but are negatively regulated by phosphorylation at the C-terminal tyr by Csk (C-terminal Src Kinase). However, Brk lacks the N-terminal myristoylation site. The SH3 domain of Src kinases contributes to substrate recruitment by binding adaptor proteins/substrates, and regulation of kinase activity through an intramolecular interaction. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212781 [Multi-domain]  Cd Length: 58  Bit Score: 42.93  E-value: 1.90e-05
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gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQREdGGWWEGTLNDK------TGWFPSNYVNE 58
Cdd:cd11847    4 ALWDFKARGDEELSFQAGDQFRIAERS-GDWWTALKLDRaggvvaQGFVPNNYLAR 58
SH3_Fyn_Yrk cd12006
Src homology 3 domain of Fyn and Yrk Protein Tyrosine Kinases; Fyn and Yrk (Yes-related kinase) ...
9-56 2.33e-05

Src homology 3 domain of Fyn and Yrk Protein Tyrosine Kinases; Fyn and Yrk (Yes-related kinase) are members of the Src subfamily of proteins, which are cytoplasmic (or non-receptor) PTKs. Fyn, together with Lck, plays a critical role in T-cell signal transduction by phosphorylating ITAM (immunoreceptor tyr activation motif) sequences on T-cell receptors, ultimately leading to the proliferation and differentiation of T-cells. In addition, Fyn is involved in the myelination of neurons, and is implicated in Alzheimer's and Parkinson's diseases. Yrk has been detected only in chickens. It is primarily found in neuronal and epithelial cells and in macrophages. It may play a role in inflammation and in response to injury. Src kinases contain an N-terminal SH4 domain with a myristoylation site, followed by SH3 and SH2 domains, a tyr kinase domain, and a regulatory C-terminal region containing a conserved tyr. They are activated by autophosphorylation at the tyr kinase domain, but are negatively regulated by phosphorylation at the C-terminal tyr by Csk (C-terminal Src Kinase). The SH3 domain of Src kinases contributes to substrate recruitment by binding adaptor proteins/substrates, and regulation of kinase activity through an intramolecular interaction. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212939 [Multi-domain]  Cd Length: 56  Bit Score: 42.73  E-value: 2.33e-05
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gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGT--LNDKTGWFPSNYV 56
Cdd:cd12006    5 ALYDYEARTEDDLSFHKGEKFQILNSSEGDWWEARslTTGETGYIPSNYV 54
SH3_Tks5_2 cd12077
Second Src homology 3 domain of Tyrosine kinase substrate with five SH3 domains; Tks5, also ...
13-58 2.42e-05

Second Src homology 3 domain of Tyrosine kinase substrate with five SH3 domains; Tks5, also called SH3 and PX domain-containing protein 2A (SH3PXD2A) or Five SH (FISH), is a scaffolding protein and Src substrate that is localized in podosomes, which are electron-dense structures found in Src-transformed fibroblasts, osteoclasts, macrophages, and some invasive cancer cells. It binds and regulates some members of the ADAMs family of transmembrane metalloproteases, which function as sheddases and mediators of cell and matrix interactions. It is required for podosome formation, degradation of the extracellular matrix, and cancer cell invasion. Tks5 contains an N-terminal Phox homology (PX) domain and five SH3 domains. This model characterizes the second SH3 domain of Tks5. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 213010  Cd Length: 54  Bit Score: 42.71  E-value: 2.42e-05
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gi 221476505  13 FMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd12077    9 YTSQGKDEIGFEKGVTVEVIQKNLEGWWYIRYLGKEGWAPASYLKK 54
SH3_CAS cd11844
Src homology 3 domain of CAS (Crk-Associated Substrate) scaffolding proteins; CAS proteins ...
19-54 2.70e-05

Src homology 3 domain of CAS (Crk-Associated Substrate) scaffolding proteins; CAS proteins function as molecular scaffolds to regulate protein complexes that are involved in many cellular processes including migration, chemotaxis, apoptosis, differentiation, and progenitor cell function. They mediate the signaling of integrins at focal adhesions where they localize, and thus, regulate cell invasion and survival. Over-expression of these proteins is implicated in poor prognosis, increased metastasis, and resistance to chemotherapeutics in many cancers such as breast, lung, melanoma, and glioblastoma. CAS proteins have also been linked to the pathogenesis of inflammatory disorders, Alzheimer's, Parkinson's, and developmental defects. They share a common domain structure that includes an N-terminal SH3 domain, an unstructured substrate domain that contains many YxxP motifs, a serine-rich four-helix bundle, and a FAT-like C-terminal domain. Vertebrates contain four CAS proteins: BCAR1 (or p130Cas), NEDD9 (or HEF1), EFS (or SIN), and CASS4 (or HEPL). The SH3 domain of CAS proteins binds to diverse partners including FAK, FRNK, Pyk2, PTP-PEST, DOCK180, among others. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212778  Cd Length: 56  Bit Score: 42.72  E-value: 2.70e-05
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                 ....*....|....*....|....*....|....*....
gi 221476505  19 DELCFQKGDVITVTQREDG---GWWEGTLNDKTGWFPSN 54
Cdd:cd11844   14 DELAFRRGDILTVLEQNTAgleGWWLCSLRGRQGIAPGN 52
SH3_VAV2_1 cd11980
First Src homology 3 domain of VAV2 protein; VAV2 is widely expressed and functions as a ...
21-56 2.82e-05

First Src homology 3 domain of VAV2 protein; VAV2 is widely expressed and functions as a guanine nucleotide exchange factor (GEF) for RhoA, RhoB and RhoG and also activates Rac1 and Cdc42. It is implicated in many cellular and physiological functions including blood pressure control, eye development, neurite outgrowth and branching, EGFR endocytosis and degradation, and cell cluster morphology, among others. It has been reported to associate with Nek3. VAV proteins contain several domains that enable their function: N-terminal calponin homology (CH), acidic, RhoGEF (also called Dbl-homologous or DH), Pleckstrin Homology (PH), C1 (zinc finger), SH2, and two SH3 domains. The SH3 domain of VAV is involved in the localization of proteins to specific sites within the cell, by interacting with proline-rich sequences within target proteins. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212913  Cd Length: 60  Bit Score: 42.62  E-value: 2.82e-05
                         10        20        30
                 ....*....|....*....|....*....|....*....
gi 221476505  21 LCFQKGDVITVTQRE-DGGWWEGTL--NDKTGWFPSNYV 56
Cdd:cd11980   20 LTFQTGDVIELLRGDpDSPWWEGRLlqTKKSGYFPSSSV 58
SH3_GRAF cd12064
Src Homology 3 domain of GTPase Regulator Associated with Focal adhesion kinase; GRAF, also ...
8-56 2.96e-05

Src Homology 3 domain of GTPase Regulator Associated with Focal adhesion kinase; GRAF, also called Rho GTPase activating protein 26 (ARHGAP26), Oligophrenin-1-like (OPHN1L) or GRAF1, is a GAP with activity towards RhoA and Cdc42 and is only weakly active towards Rac1. It influences Rho-mediated cytoskeletal rearrangements and binds focal adhesion kinase (FAK), which is a critical component of integrin signaling. It is essential for the major clathrin-independent endocytic pathway mediated by pleiomorphic membranes. GRAF contains an N-terminal BAR domain, followed by a Pleckstrin homology (PH) domain, a Rho GAP domain, and a C-terminal SH3 domain. The SH3 domain of GRAF binds PKNbeta, a target of the small GTPase Rho. SH3 domains bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs; they play a role in the regulation of enzymes by intramolecular interactions, changing the subcellular localization of signal pathway components and mediate multiprotein complex assemblies.


Pssm-ID: 212997  Cd Length: 56  Bit Score: 42.41  E-value: 2.96e-05
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|
gi 221476505   8 QAEYSFMGSNNDELCFQKGDVI-TVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd12064    4 KALYACKAEHDSELSFTAGTVFdNVHPSQEPGWLEGTLNGKTGLIPENYV 53
SH3_Shank3 cd11984
Src homology 3 domain of SH3 and multiple ankyrin repeat domains protein 3; Shank3, also ...
20-56 3.05e-05

Src homology 3 domain of SH3 and multiple ankyrin repeat domains protein 3; Shank3, also called ProSAP2 (Proline-rich synapse-associated protein 2), is widely expressed. It plays a role in the formation of dendritic spines and synapses. Haploinsufficiency of the Shank3 gene causes the 22q13 deletion/Phelan-McDermid syndrome, and variants of Shank3 have been implicated in autism spectrum disorder, schizophrenia, and intellectual disability. Shank proteins carry scaffolding functions through multiple sites of protein-protein interaction in its domain architecture, including ankyrin (ANK) repeats, a long proline rich region, as well as SH3, PDZ, and SAM domains. The SH3 domain of Shank binds GRIP, a scaffold protein that binds AMPA receptors and Eph receptors/ligands. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212917  Cd Length: 52  Bit Score: 42.25  E-value: 3.05e-05
                         10        20        30
                 ....*....|....*....|....*....|....*..
gi 221476505  20 ELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11984   16 EIQLNRGERVKVLSIGEGGFWEGTVKGRTGWFPADCV 52
SH3_GRAF2 cd12065
Src Homology 3 domain of GTPase Regulator Associated with Focal adhesion kinase 2; GRAF2, also ...
8-56 3.20e-05

Src Homology 3 domain of GTPase Regulator Associated with Focal adhesion kinase 2; GRAF2, also called Rho GTPase activating protein 10 (ARHGAP10) or PS-GAP, is a GAP with activity towards Cdc42 and RhoA. It regulates caspase-activated p21-activated protein kinase-2 (PAK-2p34). GRAF2 interacts with PAK-2p34, leading to its stabilization and decrease of cell death. It is highly expressed in skeletal muscle, and is involved in alpha-catenin recruitment at cell-cell junctions. GRAF2 contains an N-terminal BAR domain, followed by a Pleckstrin homology (PH) domain, a Rho GAP domain, and a C-terminal SH3 domain. The SH3 domain of GRAF binds PKNbeta, a target of the small GTPase Rho. SH3 domains bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs; they play a role in the regulation of enzymes by intramolecular interactions, changing the subcellular localization of signal pathway components and mediate multiprotein complex assemblies.


Pssm-ID: 212998 [Multi-domain]  Cd Length: 54  Bit Score: 42.28  E-value: 3.20e-05
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|
gi 221476505   8 QAEYSFMGSNNDELCFQKGDVI-TVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd12065    3 KAVYPCEAEHSSELSFEVGAIFeDVTLSREPGWLEGTLNGKRGLIPENYV 52
SH3_NoxO1_2 cd12024
Second or C-terminal Src homology 3 domain of NADPH oxidase (Nox) Organizing protein 1; Nox ...
12-55 3.21e-05

Second or C-terminal Src homology 3 domain of NADPH oxidase (Nox) Organizing protein 1; Nox Organizing protein 1 (NoxO1) is a critical regulator of enzyme kinetics of the nonphagocytic NADPH oxidase Nox1, which catalyzes the transfer of electrons from NADPH to molecular oxygen to form superoxide. Nox1 is expressed in colon, stomach, uterus, prostate, and vascular smooth muscle cells. NoxO1 is involved in targeting activator subunits (such as NoxA1) to Nox1. It is co-localized with Nox1 in the membranes of resting cells and directs the subcellular localization of Nox1. NoxO1 contains an N-terminal Phox homology (PX) domain, tandem SH3 domains (N-SH3 and C-SH3), and a C-terminal proline-rich region (PRR). This model characterizes the second SH3 domain (or C-SH3) of NoxO1. The tandem SH3 domains of NoxO1 interact with the PRR of p22phox, which also complexes with Nox1. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212957  Cd Length: 53  Bit Score: 42.32  E-value: 3.21e-05
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....
gi 221476505  12 SFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNY 55
Cdd:cd12024    7 AYEAQKEDELSVPAGVVVEVLQKSDNGWWLIRYNGRAGYVPSMY 50
SH3_SKAP1-like cd11866
Src Homology 3 domain of Src Kinase-Associated Phosphoprotein 1 and similar proteins; This ...
15-56 3.22e-05

Src Homology 3 domain of Src Kinase-Associated Phosphoprotein 1 and similar proteins; This subfamily is composed of SKAP1, SKAP2, and similar proteins. SKAP1 and SKAP2 are immune cell-specific adaptor proteins that play roles in T- and B-cell adhesion, respectively, and are thus important in the migration of T- and B-cells to sites of inflammation and for movement during T-cell conjugation with antigen-presenting cells. Both SKAP1 and SKAP2 bind to ADAP (adhesion and degranulation-promoting adaptor protein), among many other binding partners. They contain a pleckstrin homology (PH) domain, a C-terminal SH3 domain, and several tyrosine phosphorylation sites. The SH3 domain of SKAP1 is necessary for its ability to regulate T-cell conjugation with antigen-presenting cells and the formation of LFA-1 clusters. SKAP1 binds primarily to a proline-rich region of ADAP through its SH3 domain; its degradation is regulated by ADAP. A secondary interaction occurs via the ADAP SH3 domain and the RKxxYxxY motif in SKAP1. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212800  Cd Length: 53  Bit Score: 42.42  E-value: 3.22e-05
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....
gi 221476505  15 GSNNDELCFQKGDVITVTQRE-DG-GWWEGTLNDKTGWFPSNYV 56
Cdd:cd11866   10 GNEPDELSFKRGDLIYIISKEyDSfGWWVGELNGKVGLVPKDYL 53
SH3_Alpha_Spectrin cd11808
Src homology 3 domain of Alpha Spectrin; Spectrin is a major structural component of the red ...
6-56 3.50e-05

Src homology 3 domain of Alpha Spectrin; Spectrin is a major structural component of the red blood cell membrane skeleton and is important in erythropoiesis and membrane biogenesis. It is a flexible, rope-like molecule composed of two subunits, alpha and beta, which consist of many spectrin-type repeats. Alpha and beta spectrin associate to form heterodimers and tetramers; spectrin tetramer formation is critical for red cell shape and deformability. Defects in alpha spectrin have been associated with inherited hemolytic anemias including hereditary spherocytosis (HSp), hereditary elliptocytosis (HE), and hereditary pyropoikilocytosis (HPP). Alpha spectrin contains a middle SH3 domain and a C-terminal EF-hand binding motif in addition to multiple spectrin repeats. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212742 [Multi-domain]  Cd Length: 53  Bit Score: 42.09  E-value: 3.50e-05
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|.
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11808    1 CVVALYDYQEKSPREVSMKKGDILTLLNSSNKDWWKVEVNDRQGFVPAAYV 51
SH3_SH3RF_C cd11785
C-terminal (Fourth) Src Homology 3 domain of SH3 domain containing ring finger 1 (SH3RF1), ...
20-56 3.55e-05

C-terminal (Fourth) Src Homology 3 domain of SH3 domain containing ring finger 1 (SH3RF1), SH3RF3, and similar domains; SH3RF1 (or POSH) and SH3RF3 (or POSH2) are scaffold proteins that function as E3 ubiquitin-protein ligases. They contain an N-terminal RING finger domain and four SH3 domains. This model represents the fourth SH3 domain, located at the C-terminus of SH3RF1 and SH3RF3, and similar domains. SH3RF1 plays a role in calcium homeostasis through the control of the ubiquitin domain protein Herp. It may also have a role in regulating death receptor mediated and JNK mediated apoptosis. SH3RF3 interacts with p21-activated kinase 2 (PAK2) and GTP-loaded Rac1. It may play a role in regulating JNK mediated apoptosis in certain conditions. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212719  Cd Length: 55  Bit Score: 42.07  E-value: 3.55e-05
                         10        20        30
                 ....*....|....*....|....*....|....*....
gi 221476505  20 ELCFQKGDVITVTQREDGGWWEGTL--NDKTGWFPSNYV 56
Cdd:cd11785   15 ELELKEGDIVFVHKKREDGWFKGTLqrTGKTGLFPGSFV 53
SH3_CRK_C cd11759
C-terminal Src Homology 3 domain of Ct10 Regulator of Kinase adaptor proteins; CRK adaptor ...
21-56 3.83e-05

C-terminal Src Homology 3 domain of Ct10 Regulator of Kinase adaptor proteins; CRK adaptor proteins consists of SH2 and SH3 domains, which bind tyrosine-phosphorylated peptides and proline-rich motifs, respectively. They function downstream of protein tyrosine kinases in many signaling pathways started by various extracellular signals, including growth and differentiation factors. Cellular CRK (c-CRK) contains a single SH2 domain, followed by N-terminal and C-terminal SH3 domains. It is involved in the regulation of many cellular processes including cell growth, motility, adhesion, and apoptosis. CRK has been implicated in the malignancy of various human cancers. The C-terminal SH3 domain of CRK has not been shown to bind any target protein; it acts as a negative regulator of CRK function by stabilizing a structure that inhibits the access by target proteins to the N-terminal SH3 domain. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes by intramolecular interactions, changing the subcellular localization of signal pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212693 [Multi-domain]  Cd Length: 57  Bit Score: 42.09  E-value: 3.83e-05
                         10        20        30
                 ....*....|....*....|....*....|....*.
gi 221476505  21 LCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11759   20 LALEVGDLVKVTKINVSGQWEGELNGKVGHFPFTHV 55
SH3_EFS cd12003
Src homology 3 domain of CAS (Crk-Associated Substrate) scaffolding protein family member, ...
8-56 4.11e-05

Src homology 3 domain of CAS (Crk-Associated Substrate) scaffolding protein family member, Embryonal Fyn-associated Substrate; EFS is also called HEFS, CASS3 (Cas scaffolding protein family member 3) or SIN (Src-interacting protein). It was identified based on interactions with the Src kinases, Fyn and Yes. It plays a role in thymocyte development and acts as a negative regulator of T cell proliferation. CAS proteins function as molecular scaffolds to regulate protein complexes that are involved in many cellular processes. They share a common domain structure that includes an N-terminal SH3 domain, an unstructured substrate domain that contains many YxxP motifs, a serine-rich four-helix bundle, and a FAT-like C-terminal domain. The SH3 domain of CAS proteins binds to diverse partners including FAK, FRNK, Pyk2, PTP-PEST, DOCK180, among others. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212936  Cd Length: 62  Bit Score: 42.18  E-value: 4.11e-05
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|..
gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQREDG---GWWEGTLNDKTGWFPSNYV 56
Cdd:cd12003    4 KALYDNAAESPEELSFRRGDVLMVLKREHGslpGWWLCSLHGQQGIAPANRL 55
SH3_Sorbs1_2 cd11922
Second Src Homology 3 domain of Sorbin and SH3 domain containing 1 (Sorbs1), also called ...
9-57 4.25e-05

Second Src Homology 3 domain of Sorbin and SH3 domain containing 1 (Sorbs1), also called ponsin; Sorbs1 is also called ponsin, SH3P12, or CAP (c-Cbl associated protein). It is an adaptor protein containing one sorbin homology (SoHo) and three SH3 domains. It binds Cbl and plays a major role in regulating the insulin signaling pathway by enhancing insulin-induced phosphorylation of Cbl. Sorbs1, like vinexin, localizes at cell-ECM and cell-cell adhesion sites where it binds vinculin, paxillin, and afadin. It may function in the control of cell motility. Other interaction partners of Sorbs1 include c-Abl, Sos, flotillin, Grb4, ataxin-7, filamin C, among others. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212855 [Multi-domain]  Cd Length: 58  Bit Score: 41.90  E-value: 4.25e-05
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|.
gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTL--NDKTGWFPSNYVN 57
Cdd:cd11922    5 AKFNFNGDTQVEMSFRKGERITLLRQVDENWYEGRIpgTSRQGIFPITYVD 55
SH3_PACSIN3 cd11997
Src homology 3 domain of Protein kinase C and Casein kinase Substrate in Neurons 3 (PACSIN3); ...
7-56 4.55e-05

Src homology 3 domain of Protein kinase C and Casein kinase Substrate in Neurons 3 (PACSIN3); PACSIN 3 or Syndapin III (Synaptic dynamin-associated protein III) is expressed ubiquitously and regulates glucose uptake in adipocytes through its role in GLUT1 trafficking. It also modulates the subcellular localization and stimulus-specific function of the cation channel TRPV4. PACSINs act as regulators of cytoskeletal and membrane dynamics. Vetebrates harbor three isoforms with distinct expression patterns and specific functions. PACSINs contain an N-terminal F-BAR domain and a C-terminal SH3 domain. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212930 [Multi-domain]  Cd Length: 56  Bit Score: 41.87  E-value: 4.55e-05
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|..
gi 221476505   7 VQAEYSFMGSNNDELCFQKG-DVITVTQREDGGWWEGTL-NDKTGWFPSNYV 56
Cdd:cd11997    4 VRALYDYTGQEADELSFKAGeELLKIGEEDEQGWCKGRLlSGRIGLYPANYV 55
SH3_Noxa1_C cd12047
C-terminal Src Homology 3 domain of NADPH oxidase activator 1; Noxa1 is a homolog of p67phox ...
7-56 5.29e-05

C-terminal Src Homology 3 domain of NADPH oxidase activator 1; Noxa1 is a homolog of p67phox and is a cytosolic subunit of the nonphagocytic NADPH oxidase complex Nox1, which catalyzes the transfer of electrons from NADPH to molecular oxygen to form superoxide. Noxa1 is co-expressed with Nox1 in colon, stomach, uterus, prostate, and vascular smooth muscle cells, consistent with its regulatory role. It does not interact with p40phox, unlike p67phox, making Nox1 activity independent of p40phox, unlike Nox2. Noxa1 contains TPR, PB1, and C-terminal SH3 domains, but lacks the central SH3 domain that is present in p67phox. The TPR domain binds activated GTP-bound Rac. The C-terminal SH3 domain binds the polyproline motif found at the C-terminus of Noxo1, a homolog of p47phox. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212980  Cd Length: 53  Bit Score: 41.73  E-value: 5.29e-05
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd12047    2 MVAQHDYSAQGPEDLEFSQGDTIDILSEVNQEWLEGHCDGRIGIFPKCFA 51
SH3_RIM-BP_3 cd12013
Third Src homology 3 domain of Rab3-interacting molecules (RIMs) binding proteins; RIMs ...
20-58 5.45e-05

Third Src homology 3 domain of Rab3-interacting molecules (RIMs) binding proteins; RIMs binding proteins (RBPs, RIM-BPs) associate with calcium channels present in photoreceptors, neurons, and hair cells; they interact simultaneously with specific calcium channel subunits, and active zone proteins, RIM1 and RIM2. RIMs are part of the matrix at the presynaptic active zone and are associated with synaptic vesicles through their interaction with the small GTPase Rab3. RIM-BPs play a role in regulating synaptic transmission by serving as adaptors and linking calcium channels with the synaptic vesicle release machinery. RIM-BPs contain three SH3 domains and two to three fibronectin III repeats. Invertebrates contain one, while vertebrates contain at least two RIM-BPs, RIM-BP1 and RIM-BP2. RIM-BP1 is also called peripheral-type benzodiazapine receptor associated protein 1 (PRAX-1). Mammals contain a third protein, RIM-BP3. RIM-BP1 and RIM-BP2 are predominantly expressed in the brain where they display overlapping but distinct expression patterns, while RIM-BP3 is almost exclusively expressed in the testis and is essential in spermiogenesis. The SH3 domains of RIM-BPs bind to the PxxP motifs of RIM1, RIM2, and L-type (alpha1D) and N-type (alpha1B) calcium channel subunits. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212946  Cd Length: 61  Bit Score: 41.98  E-value: 5.45e-05
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|
gi 221476505  20 ELCFQKGDVITV-TQREDGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd12013   22 ELSFRAGDIITVfGEMDEDGFYYGELNGQRGLVPSNFLEE 61
SH3_p47phox_1 cd12021
First or N-terminal Src homology 3 domain of the p47phox subunit of NADPH oxidase, also called ...
7-56 5.97e-05

First or N-terminal Src homology 3 domain of the p47phox subunit of NADPH oxidase, also called Neutrophil Cytosolic Factor 1; p47phox, or NCF1, is a cytosolic subunit of the phagocytic NADPH oxidase complex (also called Nox2 or gp91phox), which plays a key role in the ability of phagocytes to defend against bacterial infections. NADPH oxidase catalyzes the transfer of electrons from NADPH to oxygen during phagocytosis forming superoxide and reactive oxygen species. p47phox is required for activation of NADH oxidase and plays a role in translocation. It contains an N-terminal Phox homology (PX) domain, tandem SH3 domains (N-SH3 and C-SH3), a polybasic/autoinhibitory region, and a C-terminal proline-rich region (PRR). This model characterizes the first SH3 domain (or N-SH3) of p47phox. In its inactive state, the tandem SH3 domains interact intramolecularly with the autoinhibitory region; upon activation, the tandem SH3 domains are exposed through a conformational change, resulting in their binding to the PRR of p22phox and the activation of NADPH oxidase. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212954 [Multi-domain]  Cd Length: 53  Bit Score: 41.48  E-value: 5.97e-05
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|
gi 221476505   7 VQAEYSfmGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd12021    4 AIADYE--KSSKSEMALKTGDVVEVVEKSENGWWFCQLKAKRGWVPASYL 51
SH3_srGAP4 cd11956
Src homology 3 domain of Slit-Robo GTPase Activating Protein 4; srGAP4, also called ARHGAP4, ...
9-56 6.05e-05

Src homology 3 domain of Slit-Robo GTPase Activating Protein 4; srGAP4, also called ARHGAP4, is highly expressed in hematopoietic cells and may play a role in lymphocyte differentiation. It is able to stimulate the GTPase activity of Rac1, Cdc42, and RhoA. In the nervous system, srGAP4 has been detected in differentiating neurites and may be involved in axon and dendritic growth. srGAPs are Rho GAPs that interact with Robo1, the transmembrane receptor of Slit proteins. Slit proteins are secreted proteins that control axon guidance and the migration of neurons and leukocytes. srGAPs contain an N-terminal F-BAR domain, a Rho GAP domain, and a C-terminal SH3 domain. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212889 [Multi-domain]  Cd Length: 55  Bit Score: 41.36  E-value: 6.05e-05
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*...
gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11956    6 ACFDYTGRTAQELSFKRGDVLLLHSKASSDWWRGEHNGMRGLIPHKYI 53
SH3_ephexin1 cd11939
Src homology 3 domain of the Rho guanine nucleotide exchange factor, ephexin-1 (also called ...
7-58 6.59e-05

Src homology 3 domain of the Rho guanine nucleotide exchange factor, ephexin-1 (also called NGEF or ARHGEF27); Ephexin-1, also called NGEF (neuronal GEF) or ARHGEF27, activates RhoA, Tac1, and Cdc42 by exchanging bound GDP for free GTP. It is expressed mainly in the brain in a region associated with movement control. It regulates the stability of postsynaptic acetylcholine receptor (AChR) clusters and thus, plays a critical role in the maturation and neurotransmission of neuromuscular junctions. Ephexin-1 directly interacts with the ephrin receptor EphA4 and their coexpression enhances the ability of ephexin-1 to activate RhoA. It is required for normal axon growth and EphA-induced growth cone collapse. Ephexin-1 contains RhoGEF (also called Dbl-homologous or DH), Pleckstrin Homology (PH), and SH3 domains. The SH3 domains of ARHGEFs play an autoinhibitory role through intramolecular interactions with a proline-rich region N-terminal to the DH domain. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212872 [Multi-domain]  Cd Length: 55  Bit Score: 41.47  E-value: 6.59e-05
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGT-LNDKT-GWFPSNYVNE 58
Cdd:cd11939    2 VQCVHPYVSQEPDELSLELADVLNILDKTDDGWIFGErLHDQErGWFPSSVVEE 55
SH3_DNMBP_C2_like cd11800
Second C-terminal Src homology 3 domain of Dynamin Binding Protein, also called Tuba, and ...
6-57 6.64e-05

Second C-terminal Src homology 3 domain of Dynamin Binding Protein, also called Tuba, and similar domains; DNMBP or Tuba is a cdc42-specific guanine nucleotide exchange factor (GEF) that contains four N-terminal SH3 domains, a central RhoGEF [or Dbl homology (DH)] domain followed by a Bin/Amphiphysin/Rvs (BAR) domain, and two C-terminal SH3 domains. It provides a functional link between dynamin, Rho GTPase signaling, and actin dynamics. It plays an important role in regulating cell junction configuration. The C-terminal SH3 domains of DNMBP bind to N-WASP and Ena/VASP proteins, which are key regulatory proteins of the actin cytoskeleton. Also included in this subfamily is the second C-terminal SH3 domain of Rho guanine nucleotide exchange factor 37 (ARHGEF37), whose function is still unknown. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212734 [Multi-domain]  Cd Length: 57  Bit Score: 41.59  E-value: 6.64e-05
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*.
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQRED--GG--WWEGTLNDKTGWFPSNYVN 57
Cdd:cd11800    1 YYYALYTFEARSPGELSVTEGQVVTVLEKHDlkGNpeWWLVEDRGKQGYVPSNYLA 56
PH pfam00169
PH domain; PH stands for pleckstrin homology.
294-371 7.04e-05

PH domain; PH stands for pleckstrin homology.


Pssm-ID: 459697 [Multi-domain]  Cd Length: 105  Bit Score: 42.93  E-value: 7.04e-05
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 221476505  294 RDRYFVLFPQTLLFLSVSQRMSAFIYEGKLPLTGIIVNRLEDTDAL--KNAFEISSPLID---RIVAVCQGPNEANKWVE 368
Cdd:pfam00169  19 KKRYFVLFDGSLLYYKDDKSGKSKEPKGSISLSGCEVVEVVASDSPkrKFCFELRTGERTgkrTYLLQAESEEERKDWIK 98

                  ...
gi 221476505  369 LLN 371
Cdd:pfam00169  99 AIQ 101
SH3_SH3RF3_2 cd11931
Second Src Homology 3 domain of SH3 domain containing ring finger 3, an E3 ubiquitin-protein ...
8-56 7.61e-05

Second Src Homology 3 domain of SH3 domain containing ring finger 3, an E3 ubiquitin-protein ligase; SH3RF3 is also called POSH2 (Plenty of SH3s 2) or SH3MD4 (SH3 multiple domains protein 4). It is a scaffold protein with E3 ubiquitin-protein ligase activity. It was identified in the screen for interacting partners of p21-activated kinase 2 (PAK2). It may play a role in regulating JNK mediated apoptosis in certain conditions. It also interacts with GTP-loaded Rac1. SH3RF3 is highly homologous to SH3RF1; it also contains an N-terminal RING finger domain and four SH3 domains. This model represents the second SH3 domain, located C-terminal of the first SH3 domain at the N-terminal half, of SH3RF3. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212864  Cd Length: 55  Bit Score: 41.44  E-value: 7.61e-05
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|...
gi 221476505   8 QAEYSFMGSNNDE----LCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11931    3 KALYDFEIKDKDQdkdcLTFTKDEILTVIRRVDENWAEGMLGDKIGIFPILYV 55
SH3_p67phox-like_C cd11870
C-terminal Src Homology 3 domain of the p67phox subunit of NADPH oxidase and similar proteins; ...
7-56 8.29e-05

C-terminal Src Homology 3 domain of the p67phox subunit of NADPH oxidase and similar proteins; This subfamily is composed of p67phox, NADPH oxidase activator 1 (Noxa1), and similar proteins. p67phox, also called Neutrophil cytosol factor 2 (NCF-2), and Noxa1 are homologs and are the cytosolic subunits of the phagocytic (Nox2) and nonphagocytic (Nox1) NADPH oxidase complexes, respectively. NADPH oxidase catalyzes the transfer of electrons from NADPH to oxygen during phagocytosis forming superoxide and reactive oxygen species. p67phox and Noxa1 play regulatory roles. p67phox contains N-terminal TPR, first SH3 (or N-terminal or central SH3), PB1, and C-terminal SH3 domains. Noxa1 has a similar domain architecture except it is lacking the N-terminal SH3 domain. The TPR domain of both binds activated GTP-bound Rac, while the C-terminal SH3 domain of p67phox and Noxa1 binds the polyproline motif found at the C-terminus of p47phox and Noxo1, respectively. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212803 [Multi-domain]  Cd Length: 53  Bit Score: 40.98  E-value: 8.29e-05
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11870    2 VVALHRYEAQGPEDLGFREGDTIDVLSEVNEAWLEGHSDGRVGIFPKCFV 51
SH3_Blk cd12009
Src homology 3 domain of Blk Protein Tyrosine Kinase; Blk is a member of the Src subfamily of ...
6-56 1.11e-04

Src homology 3 domain of Blk Protein Tyrosine Kinase; Blk is a member of the Src subfamily of proteins, which are cytoplasmic (or non-receptor) PTKs. It is expressed specifically in B-cells and is involved in pre-BCR (B-cell receptor) signaling. Src kinases contain an N-terminal SH4 domain with a myristoylation site, followed by SH3 and SH2 domains, a tyr kinase domain, and a regulatory C-terminal region containing a conserved tyr. They are activated by autophosphorylation at the tyr kinase domain, but are negatively regulated by phosphorylation at the C-terminal tyr by Csk (C-terminal Src Kinase). The SH3 domain of Src kinases contributes to substrate recruitment by binding adaptor proteins/substrates, and regulation of kinase activity through an intramolecular interaction. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212942 [Multi-domain]  Cd Length: 54  Bit Score: 40.57  E-value: 1.11e-04
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|...
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQrEDGGWW--EGTLNDKTGWFPSNYV 56
Cdd:cd12009    1 CVIAQYDFVPSNERDLQLKKGEKLQVLK-SDGEWWlaKSLTTGKEGYIPSNYV 52
SH3_Sho1p cd11855
Src homology 3 domain of High osmolarity signaling protein Sho1p; Sho1p (or Sho1), also called ...
7-56 1.35e-04

Src homology 3 domain of High osmolarity signaling protein Sho1p; Sho1p (or Sho1), also called SSU81 (Suppressor of SUA8-1 mutation), is a yeast membrane protein that regulates adaptation to high salt conditions by activating the HOG (high-osmolarity glycerol) pathway. High salt concentrations lead to the localization to the membrane of the MAPKK Pbs2, which is then activated by the MAPKK Ste11 and in turn, activates the MAPK Hog1. Pbs2 is localized to the membrane though the interaction of its PxxP motif with the SH3 domain of Sho1p. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212789 [Multi-domain]  Cd Length: 55  Bit Score: 40.48  E-value: 1.35e-04
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|...
gi 221476505   7 VQAEYSFMGSNND--ELCFQKGDVITVTQrEDGGWWEGTLND-KTGWFPSNYV 56
Cdd:cd11855    2 ARALYPYDASPDDpnELSFEKGEILEVSD-TSGKWWQARKSNgETGICPSNYL 53
SH3_SH3RF2_3 cd11784
Third Src Homology 3 domain of SH3 domain containing ring finger 2; SH3RF2 is also called ...
9-56 1.76e-04

Third Src Homology 3 domain of SH3 domain containing ring finger 2; SH3RF2 is also called POSHER (POSH-eliminating RING protein) or HEPP1 (heart protein phosphatase 1-binding protein). It acts as an anti-apoptotic regulator of the JNK pathway by binding to and promoting the degradation of SH3RF1 (or POSH), a scaffold protein that is required for pro-apoptotic JNK activation. It may also play a role in cardiac functions together with protein phosphatase 1. SH3RF2 contains an N-terminal RING finger domain and three SH3 domains. This model represents the third SH3 domain, located in the middle, of SH3RF2. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212718  Cd Length: 55  Bit Score: 40.15  E-value: 1.76e-04
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|
gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGT--LNDKTGWFPSNYV 56
Cdd:cd11784    4 ALHSYSAHRPEELELQKGEGVRVLGKFQEGWLRGLslVTGRVGIFPSNYV 53
SH3_BAIAP2L2 cd11914
Src Homology 3 domain of Brain-specific Angiogenesis Inhibitor 1-Associated Protein 2-Like 2; ...
15-56 1.88e-04

Src Homology 3 domain of Brain-specific Angiogenesis Inhibitor 1-Associated Protein 2-Like 2; BAIAP2L2 co-localizes with clathrin plaques but its function has not been determined. It contains an N-terminal IMD or Inverse-Bin/Amphiphysin/Rvs (I-BAR) domain, an SH3 domain, and a WASP homology 2 (WH2) actin-binding motif at the C-terminus. The related proteins, BAIAP2L1 and IRSp53, function as regulators of membrane dynamics and the actin cytoskeleton. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212847 [Multi-domain]  Cd Length: 59  Bit Score: 40.18  E-value: 1.88e-04
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*
gi 221476505  15 GSNNDELCFQKGDVITV-TQREDGGWWEGTLND--KTGWFPSNYV 56
Cdd:cd11914   12 GSNPTLLRFNRGDIITVlVPEARNGWLYGKLEGssRQGWFPEAYV 56
SH3_SPIN90 cd11849
Src homology 3 domain of SH3 protein interacting with Nck, 90 kDa (SPIN90); SPIN90 is also ...
6-56 2.65e-04

Src homology 3 domain of SH3 protein interacting with Nck, 90 kDa (SPIN90); SPIN90 is also called NCK interacting protein with SH3 domain (NCKIPSD), Dia-interacting protein (DIP), 54 kDa vimentin-interacting protein (VIP54), or WASP-interacting SH3-domain protein (WISH). It is an F-actin binding protein that regulates actin polymerization and endocytosis. It associates with the Arp2/3 complex near actin filaments and determines filament localization at the leading edge of lamellipodia. SPIN90 is expressed in the early stages of neuronal differentiation and plays a role in regulating growth cone dynamics and neurite outgrowth. It also interacts with IRSp53 and regulates cell motility by playing a role in the formation of membrane protrusions. SPIN90 contains an N-terminal SH3 domain, a proline-rich domain, and a C-terminal VCA (verprolin-homology and cofilin-like acidic) domain. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212783 [Multi-domain]  Cd Length: 53  Bit Score: 39.61  E-value: 2.65e-04
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|..
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLND-KTGWFPSNYV 56
Cdd:cd11849    1 MYRALYDFKSAEPNTLSFSEGETFLLLERSNAHWWLVTNHSgETGYVPANYV 52
SH3_NEDD9 cd12002
Src homology 3 domain of CAS (Crk-Associated Substrate) scaffolding protein family member, ...
6-56 3.06e-04

Src homology 3 domain of CAS (Crk-Associated Substrate) scaffolding protein family member, Neural precursor cell Expressed, Developmentally Down-regulated 9; NEDD9 is also called human enhancer of filamentation 1 (HEF1) or CAS-L (Crk-associated substrate in lymphocyte). It was first described as a gene predominantly expressed in early embryonic brain, and was also isolated from a screen of human proteins that regulate filamentous budding in yeast, and as a tyrosine phosphorylated protein in lymphocytes. It promotes metastasis in different solid tumors. NEDD9 localizes in focal adhesions and associates with FAK and Abl kinase. It also interacts with SMAD3 and the proteasomal machinery which allows its rapid turnover; these interactions are not shared by other CAS proteins. CAS proteins function as molecular scaffolds to regulate protein complexes that are involved in many cellular processes. They share a common domain structure that includes an N-terminal SH3 domain, an unstructured substrate domain that contains many YxxP motifs, a serine-rich four-helix bundle, and a FAT-like C-terminal domain. The SH3 domain of CAS proteins binds to diverse partners including FAK, FRNK, Pyk2, PTP-PEST, DOCK180, among others. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212935  Cd Length: 57  Bit Score: 39.58  E-value: 3.06e-04
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQREDG---GWWEGTLNDKTGWFPSNYV 56
Cdd:cd12002    1 MARALYDNVPECAEELAFRKGDILTVIEQNTGgleGWWLCSLHGRQGIAPGNRL 54
SH3_CASS4 cd12000
Src homology 3 domain of CAS (Crk-Associated Substrate) scaffolding protein family member 4; ...
5-54 3.23e-04

Src homology 3 domain of CAS (Crk-Associated Substrate) scaffolding protein family member 4; CASS4, also called HEPL (HEF1-EFS-p130Cas-like), localizes to focal adhesions and plays a role in regulating FAK activity, focal adhesion integrity, and cell spreading. It is most abundant in blood cells and lung tissue, and is also found in high levels in leukemia and ovarian cell lines. CAS proteins function as molecular scaffolds to regulate protein complexes that are involved in many cellular processes. They share a common domain structure that includes an N-terminal SH3 domain, an unstructured substrate domain that contains many YxxP motifs, a serine-rich four-helix bundle, and a FAT-like C-terminal domain. The SH3 domain of CAS proteins binds to diverse partners including FAK, FRNK, Pyk2, PTP-PEST, DOCK180, among others. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212933  Cd Length: 57  Bit Score: 39.48  E-value: 3.23e-04
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|...
gi 221476505   5 LVVQAEYSFMGSNNDELCFQKGDVITVTQR---EDGGWWEGTLNDKTGWFPSN 54
Cdd:cd12000    1 LLARALYDNKADCSDELAFRRGDILTVLEQnvpGSEGWWKCLLHGRQGLAPAN 53
SH3_VAV1_1 cd11979
First Src homology 3 domain of VAV1 protein; VAV1 is expressed predominantly in the ...
21-56 3.34e-04

First Src homology 3 domain of VAV1 protein; VAV1 is expressed predominantly in the hematopoietic system and it plays an important role in the development and activation of B and T cells. It is activated by tyrosine phosphorylation to function as a guanine nucleotide exchange factor (GEF) for Rho GTPases following cell surface receptor activation, triggering various effects such as cytoskeletal reorganization, transcription regulation, cell cycle progression, and calcium mobilization. It also serves as a scaffold protein and has been shown to interact with Ku70, Socs1, Janus kinase 2, SIAH2, S100B, Abl gene, ZAP-70, SLP76, and Syk, among others. VAV proteins contain several domains that enable their function: N-terminal calponin homology (CH), acidic, RhoGEF (also called Dbl-homologous or DH), Pleckstrin Homology (PH), C1 (zinc finger), SH2, and two SH3 domains. The first SH3 domain of Vav1 has been shown to bind the adaptor protein Grb2. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212912  Cd Length: 63  Bit Score: 39.58  E-value: 3.34e-04
                         10        20        30
                 ....*....|....*....|....*....|....*....
gi 221476505  21 LCFQKGDVITVTQRE-DGGWWEG--TLNDKTGWFPSNYV 56
Cdd:cd11979   22 LRLNPGDIVELTKAEaEQNWWEGrnTSTNEIGWFPCNRV 60
PH_Phafin2-like cd01218
Phafin2 (also called EAPF, FLJ13187, ZFYVE18 or PLEKHF2) Pleckstrin Homology (PH) domain; ...
296-371 3.43e-04

Phafin2 (also called EAPF, FLJ13187, ZFYVE18 or PLEKHF2) Pleckstrin Homology (PH) domain; Phafin2 is differentially expressed in the liver cancer cell and regulates the structure and function of the endosomes through Rab5-dependent processes. Phafin2 modulates the cell's response to extracellular stimulation by modulating the receptor density on the cell surface. Phafin2 contains a PH domain and a FYVE domain. PH domains have diverse functions, but in general are involved in targeting proteins to the appropriate cellular location or in the interaction with a binding partner. They share little sequence conservation, but all have a common fold, which is electrostatically polarized. Less than 10% of PH domains bind phosphoinositide phosphates (PIPs) with high affinity and specificity. PH domains are distinguished from other PIP-binding domains by their specific high-affinity binding to PIPs with two vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3 which results in targeting some PH domain proteins to the plasma membrane. A few display strong specificity in lipid binding. Any specificity is usually determined by loop regions or insertions in the N-terminus of the domain, which are not conserved across all PH domains. PH domains are found in cellular signaling proteins such as serine/threonine kinase, tyrosine kinases, regulators of G-proteins, endocytotic GTPases, adaptors, as well as cytoskeletal associated molecules and in lipid associated enzymes.


Pssm-ID: 269927 [Multi-domain]  Cd Length: 123  Bit Score: 41.47  E-value: 3.43e-04
                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*..
gi 221476505 296 RYFVLFPQTLLFLSVSQRMSAFIYEGKLPLTGIIVNRLEDTDALKNAFEISSPliDRIVAVC-QGPNEANKWVELLN 371
Cdd:cd01218   47 RQFFLFNDILVYGSIVINKKKYNKQRIIPLEDVKIEDLEDTGELKNGWQIISP--KKSFVVYaATATEKSEWMDHIN 121
SH3_Tks4_3 cd12078
Third Src homology 3 domain of Tyrosine kinase substrate with four SH3 domains; Tks4, also ...
13-58 4.09e-04

Third Src homology 3 domain of Tyrosine kinase substrate with four SH3 domains; Tks4, also called SH3 and PX domain-containing protein 2B (SH3PXD2B) or HOFI, is a Src substrate and scaffolding protein that plays an important role in the formation of podosomes and invadopodia, the dynamic actin-rich structures that are related to cell migration and cancer cell invasion. It is required in the formation of functional podosomes, EGF-induced membrane ruffling, and lamellipodia generation. It plays an important role in cellular attachment and cell spreading. Tks4 is essential for the localization of MT1-MMP (membrane-type 1 matrix metalloproteinase) to invadopodia. It contains an N-terminal Phox homology (PX) domain and four SH3 domains. This model characterizes the third SH3 domain of Tks4. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 213011  Cd Length: 53  Bit Score: 39.29  E-value: 4.09e-04
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*.
gi 221476505  13 FMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd12078    8 FQTTIPDGISFQAGLKVEVIEKNLSGWWYIQIEDKEGWAPATFIDK 53
SH3_UBASH3 cd11791
Src homology 3 domain of Ubiquitin-associated and SH3 domain-containing proteins, also called ...
6-57 4.66e-04

Src homology 3 domain of Ubiquitin-associated and SH3 domain-containing proteins, also called TULA (T cell Ubiquitin LigAnd) family of proteins; UBASH3 or TULA proteins are also referred to as Suppressor of T cell receptor Signaling (STS) proteins. They contain an N-terminal UBA domain, a central SH3 domain, and a C-terminal histidine phosphatase domain. They bind c-Cbl through the SH3 domain and to ubiquitin via UBA. In some vertebrates, there are two TULA family proteins, called UBASH3A (also called TULA or STS-2) and UBASH3B (also called TULA-2 or STS-1), which show partly overlapping as well as distinct functions. UBASH3B is widely expressed while UBASH3A is only found in lymphoid cells. UBASH3A facilitates apoptosis induced in T cells through its interaction with the apoptosis-inducing factor AIF. UBASH3B is an active phosphatase while UBASH3A is not. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212725 [Multi-domain]  Cd Length: 59  Bit Score: 39.21  E-value: 4.66e-04
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*...
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQRE----DGGWWEGT--LNDKTGWFPSNYVN 57
Cdd:cd11791    1 VLRVLYPYTPQEEDELELVPGDYIYVSPEEldssSDGWVEGTswLTGCSGLLPENYTE 58
SH3_BCAR1 cd12001
Src homology 3 domain of the CAS (Crk-Associated Substrate) scaffolding protein family member, ...
5-54 4.99e-04

Src homology 3 domain of the CAS (Crk-Associated Substrate) scaffolding protein family member, Breast Cancer Anti-estrogen Resistance 1; BCAR1, also called p130cas or CASS1, is the founding member of the CAS family of scaffolding proteins and was originally identified through its ability to associate with Crk. The name BCAR1 was designated because the human gene was identified in a screen for genes that promote resistance to tamoxifen. It is widely expressed and its deletion is lethal in mice. It plays a role in regulating cell motility, survival, proliferation, transformation, cancer progression, and bacterial pathogenesis. CAS proteins function as molecular scaffolds to regulate protein complexes that are involved in many cellular processes. They share a common domain structure that includes an N-terminal SH3 domain, an unstructured substrate domain that contains many YxxP motifs, a serine-rich four-helix bundle, and a FAT-like C-terminal domain. The SH3 domain of CAS proteins binds to diverse partners including FAK, FRNK, Pyk2, PTP-PEST, DOCK180, among others. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212934  Cd Length: 68  Bit Score: 39.25  E-value: 4.99e-04
                         10        20        30        40        50
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gi 221476505   5 LVVQAEYSFMGSNNDELCFQKGDVITVTQRED---GGWWEGTLNDKTGWFPSN 54
Cdd:cd12001    3 VLAKALYDNVAESPDELSFRKGDIMTVLERDTqglDGWWLCSLHGRQGIVPGN 55
SH3_Eve1_2 cd11815
Second Src homology 3 domain of ADAM-binding protein Eve-1; Eve-1, also called SH3 ...
11-56 5.01e-04

Second Src homology 3 domain of ADAM-binding protein Eve-1; Eve-1, also called SH3 domain-containing protein 19 (SH3D19) or EEN-binding protein (EBP), exists in multiple alternatively spliced isoforms. The longest isoform contains five SH3 domain in the C-terminal region and seven proline-rich motifs in the N-terminal region. It is abundantly expressed in skeletal muscle and heart, and may be involved in regulating the activity of ADAMs (A disintegrin and metalloproteases). Eve-1 interacts with EEN, an endophilin involved in endocytosis and may be the target of the MLL-EEN fusion protein that is implicated in leukemogenesis. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212749 [Multi-domain]  Cd Length: 52  Bit Score: 38.70  E-value: 5.01e-04
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*.
gi 221476505  11 YSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11815    6 HDFPAEHSDDLSLNSGEIVYLLEKIDTEWYRGKCKNTTGIFPANHV 51
SH3_Bem1p_1 cd11878
First Src Homology 3 domain of Bud emergence protein 1 and similar domains; Members of this ...
6-55 5.46e-04

First Src Homology 3 domain of Bud emergence protein 1 and similar domains; Members of this subfamily bear similarity to Saccharomyces cerevisiae Bem1p, containing two Src Homology 3 (SH3) domains at the N-terminus, a central PX domain, and a C-terminal PB1 domain. Bem1p is a scaffolding protein that is critical for proper Cdc42p activation during bud formation in yeast. During budding and mating, Bem1p migrates to the plasma membrane where it can serve as an adaptor for Cdc42p and some other proteins. Bem1p also functions as an effector of the G1 cyclin Cln3p and the cyclin-dependent kinase Cdc28p in promoting vacuolar fusion. SH3 domains bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs; they play a role in the regulation of enzymes by intramolecular interactions, changing the subcellular localization of signal pathway components and mediate multiprotein complex assemblies.


Pssm-ID: 212811 [Multi-domain]  Cd Length: 54  Bit Score: 38.81  E-value: 5.46e-04
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|...
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQRED-GGWWEGT--LNDKTGWFPSNY 55
Cdd:cd11878    1 VIRALYDYRAQTPGELSFSKGDFFHVIGEEDqGEWYEATnpVTGKRGLVPKSY 53
SH3_SH3RF1_3 cd11926
Third Src Homology 3 domain of SH3 domain containing ring finger 1, an E3 ubiquitin-protein ...
6-56 5.64e-04

Third Src Homology 3 domain of SH3 domain containing ring finger 1, an E3 ubiquitin-protein ligase; SH3RF1 is also called POSH (Plenty of SH3s) or SH3MD2 (SH3 multiple domains protein 2). It is a scaffold protein that acts as an E3 ubiquitin-protein ligase. It plays a role in calcium homeostasis through the control of the ubiquitin domain protein Herp. It may also have a role in regulating death receptor mediated and JNK mediated apoptosis. SH3RF1 also enhances the ubiquitination of ROMK1 potassium channel resulting in its increased endocytosis. It contains an N-terminal RING finger domain and four SH3 domains. This model represents the third SH3 domain, located in the middle, of SH3RF1. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212859 [Multi-domain]  Cd Length: 55  Bit Score: 38.80  E-value: 5.64e-04
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|...
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTL--NDKTGWFPSNYV 56
Cdd:cd11926    1 VYVAIYPYTPRKEDELELRKGEMFLVFERCQDGWFKGTSmhTSKIGVFPGNYV 53
SH3_SKAP2 cd12045
Src Homology 3 domain of Src Kinase-Associated Phosphoprotein 2; SKAP2, also called ...
8-56 5.73e-04

Src Homology 3 domain of Src Kinase-Associated Phosphoprotein 2; SKAP2, also called SKAP55-Related (SKAP55R) or SKAP55 homolog (SKAP-HOM or SKAP55-HOM), is an immune cell-specific adaptor protein that plays an important role in adhesion and migration of B-cells and macrophages. Binding partners include ADAP (adhesion and degranulation-promoting adaptor protein), YopH, SHPS1, and HPK1. SKAP2 has also been identified as a substrate for lymphoid-specific tyrosine phosphatase (Lyp), which has been implicated in a wide variety of autoimmune diseases. It contains a pleckstrin homology (PH) domain, a C-terminal SH3 domain, and several tyrosine phosphorylation sites. Like SKAP1, SKAP2 is expected to bind primarily to a proline-rich region of ADAP through its SH3 domain; its degradation may be regulated by ADAP. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212978  Cd Length: 53  Bit Score: 38.73  E-value: 5.73e-04
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|.
gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQREDG--GWWEGTLNDKTGWFPSNYV 56
Cdd:cd12045    3 QGLWDCTGDQPDELSFKRGDTIYILSKEYNrfGWWVGEMKGTIGLVPKAYI 53
SH3_SH3RF3_3 cd11925
Third Src Homology 3 domain of SH3 domain containing ring finger 3, an E3 ubiquitin-protein ...
9-56 6.17e-04

Third Src Homology 3 domain of SH3 domain containing ring finger 3, an E3 ubiquitin-protein ligase; SH3RF3 is also called POSH2 (Plenty of SH3s 2) or SH3MD4 (SH3 multiple domains protein 4). It is a scaffold protein with E3 ubiquitin-protein ligase activity. It was identified in the screen for interacting partners of p21-activated kinase 2 (PAK2). It may play a role in regulating JNK mediated apoptosis in certain conditions. It also interacts with GTP-loaded Rac1. SH3RF3 is highly homologous to SH3RF1; it also contains an N-terminal RING finger domain and four SH3 domains. This model represents the third SH3 domain, located in the middle, of SH3RF3. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212858  Cd Length: 57  Bit Score: 38.82  E-value: 6.17e-04
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|
gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGT--LNDKTGWFPSNYV 56
Cdd:cd11925    5 ALYAYKPQKNDELELRKGEMYRVIEKCQDGWFKGTslRTGVSGVFPGNYV 54
SH3_RIM-BP_2 cd12012
Second Src homology 3 domain of Rab3-interacting molecules (RIMs) binding proteins; RIMs ...
19-58 6.74e-04

Second Src homology 3 domain of Rab3-interacting molecules (RIMs) binding proteins; RIMs binding proteins (RBPs, RIM-BPs) associate with calcium channels present in photoreceptors, neurons, and hair cells; they interact simultaneously with specific calcium channel subunits, and active zone proteins, RIM1 and RIM2. RIMs are part of the matrix at the presynaptic active zone and are associated with synaptic vesicles through their interaction with the small GTPase Rab3. RIM-BPs play a role in regulating synaptic transmission by serving as adaptors and linking calcium channels with the synaptic vesicle release machinery. RIM-BPs contain three SH3 domains and two to three fibronectin III repeats. Invertebrates contain one, while vertebrates contain at least two RIM-BPs, RIM-BP1 and RIM-BP2. RIM-BP1 is also called peripheral-type benzodiazapine receptor associated protein 1 (PRAX-1). Mammals contain a third protein, RIM-BP3. RIM-BP1 and RIM-BP2 are predominantly expressed in the brain where they display overlapping but distinct expression patterns, while RIM-BP3 is almost exclusively expressed in the testis and is essential in spermiogenesis. The SH3 domains of RIM-BPs bind to the PxxP motifs of RIM1, RIM2, and L-type (alpha1D) and N-type (alpha1B) calcium channel subunits. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212945  Cd Length: 62  Bit Score: 38.81  E-value: 6.74e-04
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|..
gi 221476505  19 DELCFQKGDVITV--TQREDGGWWeGTLNDKTGWFPSNYVNE 58
Cdd:cd12012   22 EELPFKEGQLIKVygDKDADGFYL-GEINGRRGLVPCNMVSE 62
SH3_SASH3 cd11968
Src homology 3 domain of Sam And SH3 Domain Containing Protein 3; SASH3, also called SLY/SLY1 ...
19-57 6.88e-04

Src homology 3 domain of Sam And SH3 Domain Containing Protein 3; SASH3, also called SLY/SLY1 (SH3-domain containing protein expressed in lymphocytes), is expressed exclusively in lymhocytes and is essential in the full activation of adaptive immunity. It is involved in the signaling of T cell receptors. It was the first described member of the SLY family of proteins, which are adaptor proteins containing a central conserved region with a bipartite nuclear localization signal (NLS) as well as SAM (sterile alpha motif) and SH3 domains. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212901  Cd Length: 56  Bit Score: 38.70  E-value: 6.88e-04
                         10        20        30
                 ....*....|....*....|....*....|....*....
gi 221476505  19 DELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVN 57
Cdd:cd11968   17 DSLKLQKGDIIQIIEKPPVGTWTGLLNNKVGTFKFIYVD 55
SH3_DNMBP_N2 cd11795
Second N-terminal Src homology 3 domain of Dynamin Binding Protein, also called Tuba; DNMBP or ...
19-58 6.96e-04

Second N-terminal Src homology 3 domain of Dynamin Binding Protein, also called Tuba; DNMBP or Tuba is a cdc42-specific guanine nucleotide exchange factor (GEF) that contains four N-terminal SH3 domains, a central RhoGEF [or Dbl homology (DH)] domain followed by a Bin/Amphiphysin/Rvs (BAR) domain, and two C-terminal SH3 domains. It provides a functional link between dynamin and key regulatory proteins of the actin cytoskeleton. It plays an important role in regulating cell junction configuration. The four N-terminal SH3 domains of DNMBP binds the GTPase dynamin, which plays an important role in the fission of endocytic vesicles. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212729  Cd Length: 54  Bit Score: 38.58  E-value: 6.96e-04
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|.
gi 221476505  19 DELCFQKGDVITVTQREDGGWWEGTL-NDKTGWFPSNYVNE 58
Cdd:cd11795   14 GHLNLQRGDLVELTGTTDSGWLQGRScWGSSGFFPSSCVQE 54
SH3_FCHSD_1 cd11761
First Src Homology 3 domain of FCH and double SH3 domains proteins; This group is composed of ...
4-57 8.21e-04

First Src Homology 3 domain of FCH and double SH3 domains proteins; This group is composed of FCH and double SH3 domains protein 1 (FCHSD1) and FCHSD2. These proteins have a common domain structure consisting of an N-terminal F-BAR (FES-CIP4 Homology and Bin/Amphiphysin/Rvs), two SH3, and C-terminal proline-rich domains. They have only been characterized in silico and their functions remain unknown. This group also includes the insect protein, nervous wreck, which acts as a regulator of synaptic growth signaling. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212695 [Multi-domain]  Cd Length: 57  Bit Score: 38.50  E-value: 8.21e-04
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*.
gi 221476505   4 PLVVQAEYSFMGSNNDELCFQKGDVITVTQREDG-GWWEG-TLNDKTGWFPSNYVN 57
Cdd:cd11761    1 PVTCKVLYSYEAQRPDELTITEGEELEVIEDGDGdGWVKArNKSGEVGYVPENYLQ 56
SH3_GRAF3 cd12066
Src Homology 3 domain of GTPase Regulator Associated with Focal adhesion kinase 3; GRAF3 is ...
8-56 8.31e-04

Src Homology 3 domain of GTPase Regulator Associated with Focal adhesion kinase 3; GRAF3 is also called Rho GTPase activating protein 42 (ARHGAP42) or ARHGAP10-like. Though its function has not been characterized, it may be a GAP with activity towards RhoA and Cdc42, based on its similarity to GRAF and GRAF2. It contains an N-terminal BAR domain, followed by a Pleckstrin homology (PH) domain, a Rho GAP domain, and a C-terminal SH3 domain. The SH3 domain of GRAF and GRAF2 binds PKNbeta, a target of the small GTPase Rho. SH3 domains bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs; they play a role in the regulation of enzymes by intramolecular interactions, changing the subcellular localization of signal pathway components and mediate multiprotein complex assemblies.


Pssm-ID: 212999  Cd Length: 55  Bit Score: 38.50  E-value: 8.31e-04
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|
gi 221476505   8 QAEYSFMGSNNDELCFQKGDVITVTQRE-DGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd12066    3 KAMYSCKAEHSHELSFPQGAIFSNVYPSvEPGWLKATYEGKTGLVPENYV 52
SH3_BAIAP2L1 cd11913
Src Homology 3 domain of Brain-specific Angiogenesis Inhibitor 1-Associated Protein 2-Like 1, ...
15-55 8.32e-04

Src Homology 3 domain of Brain-specific Angiogenesis Inhibitor 1-Associated Protein 2-Like 1, also called Insulin Receptor Tyrosine Kinase Substrate (IRTKS); BAIAP2L1 or IRTKS is widely expressed, serves as a substrate for the insulin receptor, and binds the small GTPase Rac. It plays a role in regulating the actin cytoskeleton and colocalizes with F-actin, cortactin, VASP, and vinculin. BAIAP2L1 expression leads to the formation of short actin bundles, distinct from filopodia-like protrusions induced by the expression of the related protein IRSp53. IRTKS mediates the recruitment of effector proteins Tir and EspFu, which regulate host cell actin reorganization, to bacterial attachment sites. It contains an N-terminal IMD or Inverse-Bin/Amphiphysin/Rvs (I-BAR) domain, an SH3 domain, and a WASP homology 2 (WH2) actin-binding motif at the C-terminus. The SH3 domain of IRTKS has been shown to bind the proline-rich C-terminus of EspFu. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212846  Cd Length: 58  Bit Score: 38.36  E-value: 8.32e-04
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....
gi 221476505  15 GSNNDELCFQKGDVIT-VTQREDGGWWEGTLN--DKTGWFPSNY 55
Cdd:cd11913   12 GNNKTLLSFAQGDVITlLIPEEKDGWLYGEHDttKARGWFPSSY 55
SH3_Shank2 cd11983
Src homology 3 domain of SH3 and multiple ankyrin repeat domains protein 2; Shank2, also ...
20-56 9.71e-04

Src homology 3 domain of SH3 and multiple ankyrin repeat domains protein 2; Shank2, also called ProSAP1 (Proline-rich synapse-associated protein 1) or CortBP1 (Cortactin-binding protein 1), is found in neurons, glia, endocrine cells, liver, and kidney. It plays a role in regulating dendritic spine volume and branching and postsynaptic clustering. Mutations in the Shank2 gene are associated with autism spectrum disorder and mental retardation. Shank proteins carry scaffolding functions through multiple sites of protein-protein interaction in its domain architecture, including ankyrin (ANK) repeats, a long proline rich region, as well as SH3, PDZ, and SAM domains. The SH3 domain of Shank binds GRIP, a scaffold protein that binds AMPA receptors and Eph receptors/ligands. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212916  Cd Length: 52  Bit Score: 37.99  E-value: 9.71e-04
                         10        20        30
                 ....*....|....*....|....*....|....*..
gi 221476505  20 ELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11983   16 EIPLHKGDRVKVLSIGEGGFWEGSARGHVGWFPAECV 52
SH3_CIP4_Bzz1_like cd11777
Src Homology 3 domain of Cdc42-Interacting Protein 4, Bzz1 and similar domains; This subfamily ...
9-56 1.36e-03

Src Homology 3 domain of Cdc42-Interacting Protein 4, Bzz1 and similar domains; This subfamily is composed of Cdc42-Interacting Protein 4 (CIP4) and similar proteins such as Formin Binding Protein 17 (FBP17) and FormiN Binding Protein 1-Like (FNBP1L), as well as yeast Bzz1 (or Bzz1p). CIP4 and FNBP1L are Cdc42 effectors that bind Wiskott-Aldrich syndrome protein (WASP) and function in endocytosis. CIP4 and FBP17 bind to the Fas ligand and may be implicated in the inflammatory response. CIP4 may also play a role in phagocytosis. Bzz1 is also a WASP/Las17-interacting protein involved in endocytosis and trafficking to the vacuole. It physically interacts with type I myosins and functions in the early steps of endocytosis. Members of this subfamily contain an N-terminal F-BAR (FES-CIP4 Homology and Bin/Amphiphysin/Rvs) domain as well as at least one C-terminal SH3 domain. Bzz1 contains a second SH3 domain at the C-terminus. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212711 [Multi-domain]  Cd Length: 55  Bit Score: 37.59  E-value: 1.36e-03
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|
gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDK--TGWFPSNYV 56
Cdd:cd11777    4 ALYAFVGSSEGTISMTEGEKLSLVEEDKGDGWTRVRRDTgeEGYVPTSYI 53
PH1_FGD5_FGD6 cd13389
FYVE, RhoGEF and PH domain containing/faciogenital dysplasia proteins 5 and 6, N-terminal ...
294-392 1.62e-03

FYVE, RhoGEF and PH domain containing/faciogenital dysplasia proteins 5 and 6, N-terminal Pleckstrin Homology (PH) domain; FGD5 regulates promotes angiogenesis of vascular endothelial growth factor (VEGF) in vascular endothelial cells, including network formation, permeability, directional movement, and proliferation. The specific function of FGD6 is unknown. In general, FGDs have a RhoGEF (DH) domain, followed by a PH domain, a FYVE domain and a C-terminal PH domain. All FGDs are guanine nucleotide exchange factors that activate the Rho GTPase Cdc42, an important regulator of membrane trafficking. The RhoGEF domain is responsible for GEF catalytic activity, while the PH domain is involved in intracellular targeting of the DH domain. PH domains have diverse functions, but in general are involved in targeting proteins to the appropriate cellular location or in the interaction with a binding partner. They share little sequence conservation, but all have a common fold, which is electrostatically polarized. Less than 10% of PH domains bind phosphoinositide phosphates (PIPs) with high affinity and specificity. PH domains are distinguished from other PIP-binding domains by their specific high-affinity binding to PIPs with two vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3 which results in targeting some PH domain proteins to the plasma membrane. A few display strong specificity in lipid binding. Any specificity is usually determined by loop regions or insertions in the N-terminus of the domain, which are not conserved across all PH domains. PH domains are found in cellular signaling proteins such as serine/threonine kinase, tyrosine kinases, regulators of G-proteins, endocytotic GTPases, adaptors, as well as cytoskeletal associated molecules and in lipid associated enzymes.


Pssm-ID: 275424  Cd Length: 124  Bit Score: 39.56  E-value: 1.62e-03
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 221476505 294 RDRYFVLFPQTLLFLSVSQRMSAFIYEGKLPLTGIIVNRLEDtDALKNAFEISSplIDR-IVAVCQGPNEANKWVELLNA 372
Cdd:cd13389   29 QPRYFFLFNDCLLYTTPVQSSGMLKLNNELPLSGMKVKLPED-EEYSNEFQIIS--TKRsFTLIASSEEERDEWVKALSR 105
                         90       100
                 ....*....|....*....|
gi 221476505 373 nnpSLPMGIKRQLSNLSNSS 392
Cdd:cd13389  106 ---AIEEHTKKQRTFAENVS 122
SH3_p47phox_2 cd12022
Second or C-terminal Src homology 3 domain of the p47phox subunit of NADPH oxidase, also ...
4-56 1.65e-03

Second or C-terminal Src homology 3 domain of the p47phox subunit of NADPH oxidase, also called Neutrophil Cytosolic Factor 1; p47phox, or NCF1, is a cytosolic subunit of the phagocytic NADPH oxidase complex (also called Nox2 or gp91phox), which plays a key role in the ability of phagocytes to defend against bacterial infections. NADPH oxidase catalyzes the transfer of electrons from NADPH to oxygen during phagocytosis forming superoxide and reactive oxygen species. p47phox is required for activation of NADH oxidase and plays a role in translocation. It contains an N-terminal Phox homology (PX) domain, tandem SH3 domains (N-SH3 and C-SH3), a polybasic/autoinhibitory region, and a C-terminal proline-rich region (PRR). This model characterizes the second SH3 domain (or C-SH3) of p47phox. In its inactive state, the tandem SH3 domains interact intramolecularly with the autoinhibitory region; upon activation, the tandem SH3 domains are exposed through a conformational change, resulting in their binding to the PRR of p22phox and the activation of NADPH oxidase. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212955 [Multi-domain]  Cd Length: 53  Bit Score: 37.51  E-value: 1.65e-03
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|...
gi 221476505   4 PLVVQAEYSfmGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd12022    1 LYITIKAYT--AVEEDELTLLEGEAIEVIHKLLDGWWVVRKGEVTGYFPSMYL 51
SH3_ARHGAP32_33 cd11835
Src homology 3 domain of Rho GTPase-activating proteins 32 and 33, and similar proteins; ...
19-56 1.88e-03

Src homology 3 domain of Rho GTPase-activating proteins 32 and 33, and similar proteins; Members of this family contain N-terminal PX and Src Homology 3 (SH3) domains, a central Rho GAP domain, and C-terminal extensions. RhoGAPs (or ARHGAPs) bind to Rho proteins and enhance the hydrolysis rates of bound GTP. ARHGAP32 is also called RICS, PX-RICS, p250GAP, or p200RhoGAP. It is a Rho GTPase-activating protein for Cdc42 and Rac1, and is implicated in the regulation of postsynaptic signaling and neurite outgrowth. PX-RICS, a variant of RICS that contain PX and SH3 domains, is the main isoform expressed during neural development. It is involved in neural functions including axon and dendrite extension, postnatal remodeling, and fine-tuning of neural circuits during early brain development. ARHGAP33, also called sorting nexin 26 or TCGAP (Tc10/CDC42 GTPase-activating protein), is widely expressed in the brain where it is involved in regulating the outgrowth of axons and dendrites and is regulated by the protein tyrosine kinase Fyn. It is translocated to the plasma membrane in adipocytes in response to insulin and may be involved in the regulation of insulin-stimulated glucose transport. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212769 [Multi-domain]  Cd Length: 54  Bit Score: 37.43  E-value: 1.88e-03
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|.
gi 221476505  19 DELCFQKGDVITVTQ---REDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11835   14 DELSLEVGDIVSVIDmppPEESTWWRGKKGFQVGFFPSECV 54
SH3_Tks5_4 cd12019
Fourth Src homology 3 domain of Tyrosine kinase substrate with five SH3 domains; Tks5, also ...
20-58 1.91e-03

Fourth Src homology 3 domain of Tyrosine kinase substrate with five SH3 domains; Tks5, also called SH3 and PX domain-containing protein 2A (SH3PXD2A) or Five SH (FISH), is a scaffolding protein and Src substrate that is localized in podosomes, which are electron-dense structures found in Src-transformed fibroblasts, osteoclasts, macrophages, and some invasive cancer cells. It binds and regulates some members of the ADAMs family of transmembrane metalloproteases, which function as sheddases and mediators of cell and matrix interactions. It is required for podosome formation, degradation of the extracellular matrix, and cancer cell invasion. Tks5 contains an N-terminal Phox homology (PX) domain and five SH3 domains. This model characterizes the fourth SH3 domain of Tks5. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212952  Cd Length: 53  Bit Score: 37.27  E-value: 1.91e-03
                         10        20        30
                 ....*....|....*....|....*....|....*....
gi 221476505  20 ELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVNE 58
Cdd:cd12019   15 EISFPAGVEVEVLEKQESGWWYVRFGELEGWAPSHYLEL 53
SH3_RUSC2 cd11957
Src homology 3 domain of RUN and SH3 domain-containing protein 2; RUSC2, also called Iporin or ...
7-56 1.95e-03

Src homology 3 domain of RUN and SH3 domain-containing protein 2; RUSC2, also called Iporin or Interacting protein of Rab1, is expressed ubiquitously with highest amounts in the brain and testis. It interacts with the small GTPase Rab1 and the Golgi matrix protein GM130, and may function in linking GTPases to certain intracellular signaling pathways. RUSC proteins are adaptor proteins consisting of RUN, leucine zipper, and SH3 domains. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212890  Cd Length: 52  Bit Score: 37.20  E-value: 1.95e-03
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11957    2 VKALCHHIATEPGQLSFNKGDILQVLSRADGDWLRCSLGPDSGLVPIAYV 51
SH3_DNMBP_C2 cd12141
Second C-terminal Src homology 3 domain of Dynamin Binding Protein, also called Tuba, and ...
9-56 2.27e-03

Second C-terminal Src homology 3 domain of Dynamin Binding Protein, also called Tuba, and similar domains; DNMBP or Tuba is a cdc42-specific guanine nucleotide exchange factor (GEF) that contains four N-terminal SH3 domains, a central RhoGEF [or Dbl homology (DH)] domain followed by a Bin/Amphiphysin/Rvs (BAR) domain, and two C-terminal SH3 domains. It provides a functional link between dynamin, Rho GTPase signaling, and actin dynamics. It plays an important role in regulating cell junction configuration. The C-terminal SH3 domains of DNMBP bind to N-WASP and Ena/VASP proteins, which are key regulatory proteins of the actin cytoskeleton. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 213017 [Multi-domain]  Cd Length: 57  Bit Score: 37.09  E-value: 2.27e-03
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|..
gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQRED----GGWWEGTLNDKTGWFPSNYV 56
Cdd:cd12141    4 AVYTFKARSPNELSVSANQRVRILEFSDltgnKEWWLAEANGQKGYVPSNYI 55
SH3_Abp1_fungi_C1 cd11962
First C-terminal Src homology 3 domain of Fungal Actin-binding protein 1; Abp1 is an adaptor ...
4-56 2.51e-03

First C-terminal Src homology 3 domain of Fungal Actin-binding protein 1; Abp1 is an adaptor protein that functions in receptor-mediated endocytosis and vesicle trafficking. It contains an N-terminal actin-binding module, the actin-depolymerizing factor (ADF) homology domain, a central proline-rich region, and a C-terminal SH3 domain (many yeast Abp1 proteins contain two C-terminal SH3 domains). Yeast Abp1 also contains two acidic domains that bind directly to the Arp2/3 complex, which is required to initiate actin polymerization. The SH3 domain of yeast Abp1 binds and localizes the kinases, Ark1p and Prk1p, which facilitate actin patch disassembly following vesicle internalization. It also mediates the localization to the actin patch of the synaptojanin-like protein, Sjl2p, which plays a key role in endocytosis. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212895 [Multi-domain]  Cd Length: 54  Bit Score: 37.08  E-value: 2.51e-03
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*
gi 221476505   4 PLVVQAEYSFMGSNndELCFQKGDVITVTQREDGGWWEGTlNDK--TGWFPSNYV 56
Cdd:cd11962    1 RAVVLYDYEKDEDN--EIELVEGEIVTNIEMVDEDWWMGT-NSKgeSGLFPSNYV 52
SH3_Sla1p_1 cd11773
First Src Homology 3 domain of the fungal endocytic adaptor protein Sla1p; Sla1p facilitates ...
6-55 2.89e-03

First Src Homology 3 domain of the fungal endocytic adaptor protein Sla1p; Sla1p facilitates endocytosis by playing a role as an adaptor protein in coupling components of the actin cytoskeleton to the endocytic machinery. It interacts with Abp1p, Las17p and Pan1p, which are activator proteins of actin-related protein 2/3 (Arp2/3). Sla1p contains multiple domains including three SH3 domains, a SAM (sterile alpha motif) domain, and a Sla1 homology domain 1 (SHD1), which binds to the NPFXD motif that is found in many integral membrane proteins such as the Golgi-localized Arf-binding protein Lsb5p and the P4-ATPases, Drs2p and Dnf1p. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212707 [Multi-domain]  Cd Length: 57  Bit Score: 37.02  E-value: 2.89e-03
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*..
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLND-------KTGWFPSNY 55
Cdd:cd11773    1 VYKALYDYEPQTEDELTIQEDDILYLLEKSDDDWWKVKLKVnssdddePVGLVPATY 57
SH3_RIM-BP cd11851
Src homology 3 domains of Rab3-interacting molecules (RIMs) binding proteins; RIMs binding ...
15-58 2.99e-03

Src homology 3 domains of Rab3-interacting molecules (RIMs) binding proteins; RIMs binding proteins (RBPs, RIM-BPs) associate with calcium channels present in photoreceptors, neurons, and hair cells; they interact simultaneously with specific calcium channel subunits, and active zone proteins, RIM1 and RIM2. RIMs are part of the matrix at the presynaptic active zone and are associated with synaptic vesicles through their interaction with the small GTPase Rab3. RIM-BPs play a role in regulating synaptic transmission by serving as adaptors and linking calcium channels with the synaptic vesicle release machinery. RIM-BPs contain three SH3 domains and two to three fibronectin III repeats. Invertebrates contain one, while vertebrates contain at least two RIM-BPs, RIM-BP1 and RIM-BP2. RIM-BP1 is also called peripheral-type benzodiazapine receptor associated protein 1 (PRAX-1). Mammals contain a third protein, RIM-BP3. RIM-BP1 and RIM-BP2 are predominantly expressed in the brain where they display overlapping but distinct expression patterns, while RIM-BP3 is almost exclusively expressed in the testis and is essential in spermiogenesis. The SH3 domains of RIM-BPs bind to the PxxP motifs of RIM1, RIM2, and L-type (alpha1D) and N-type (alpha1B) calcium channel subunits. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212785  Cd Length: 62  Bit Score: 36.91  E-value: 2.99e-03
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|
gi 221476505  15 GSNND----ELCFQKGDVITV-TQREDGGWWEGTLND-KTGWFPSNYVNE 58
Cdd:cd11851   13 MSPNDdpeeELSFHAGDVVRVyGPMDEDGFYYGELEGgRKGLVPSNFVQE 62
SH3_DNMBP_N4 cd11797
Fourth N-terminal Src homology 3 domain of Dynamin Binding Protein, also called Tuba; DNMBP or ...
9-55 3.01e-03

Fourth N-terminal Src homology 3 domain of Dynamin Binding Protein, also called Tuba; DNMBP or Tuba is a cdc42-specific guanine nucleotide exchange factor (GEF) that contains four N-terminal SH3 domains, a central RhoGEF [or Dbl homology (DH)] domain followed by a Bin/Amphiphysin/Rvs (BAR) domain, and two C-terminal SH3 domains. It provides a functional link between dynamin and key regulatory proteins of the actin cytoskeleton. It plays an important role in regulating cell junction configuration. The four N-terminal SH3 domains of DNMBP bind the GTPase dynamin, which plays an important role in the fission of endocytic vesicles. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212731  Cd Length: 50  Bit Score: 36.63  E-value: 3.01e-03
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*..
gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNY 55
Cdd:cd11797    4 ALYRFQALEPNELDFEVGDRIRIIATLEDGWLEGELKGRRGIFPHRF 50
SH3_Tec_like cd11768
Src Homology 3 domain of Tec-like Protein Tyrosine Kinases; The Tec (Tyrosine kinase expressed ...
6-58 3.31e-03

Src Homology 3 domain of Tec-like Protein Tyrosine Kinases; The Tec (Tyrosine kinase expressed in hepatocellular carcinoma) subfamily is composed of Tec, Btk, Bmx (Etk), Itk (Tsk, Emt), Rlk (Txk), and similar proteins. They are cytoplasmic (or nonreceptor) tyr kinases containing Src homology protein interaction domains (SH3, SH2) N-terminal to the catalytic tyr kinase domain. Most Tec subfamily members (except Rlk) also contain an N-terminal pleckstrin homology (PH) domain, which binds the products of PI3K and allows membrane recruitment and activation. In addition, some members contain the Tec homology (TH) domain, which contains proline-rich and zinc-binding regions. Tec kinases are expressed mainly by haematopoietic cells, although Tec and Bmx are also found in endothelial cells. B-cells express Btk and Tec, while T-cells express Itk, Txk, and Tec. Collectively, Tec kinases are expressed in a variety of myeloid cells such as mast cells, platelets, macrophages, and dendritic cells. Each Tec kinase shows a distinct cell-type pattern of expression. The function of Tec kinases in lymphoid cells have been studied extensively. They play important roles in the development, differentiation, maturation, regulation, survival, and function of B-cells and T-cells. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212702 [Multi-domain]  Cd Length: 54  Bit Score: 36.48  E-value: 3.31e-03
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*.
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWegTLNDK---TGWFPSNYVNE 58
Cdd:cd11768    1 IVVALYDFQPIEPGDLPLEKGEEYVVLDDSNEHWW--RARDKngnEGYIPSNYVTE 54
SH3_DNMBP_N1 cd11794
First N-terminal Src homology 3 domain of Dynamin Binding Protein, also called Tuba; DNMBP or ...
6-56 3.36e-03

First N-terminal Src homology 3 domain of Dynamin Binding Protein, also called Tuba; DNMBP or Tuba is a cdc42-specific guanine nucleotide exchange factor (GEF) that contains four N-terminal SH3 domains, a central RhoGEF [or Dbl homology (DH)] domain followed by a Bin/Amphiphysin/Rvs (BAR) domain, and two C-terminal SH3 domains. It provides a functional link between dynamin and key regulatory proteins of the actin cytoskeleton. It plays an important role in regulating cell junction configuration. The four N-terminal SH3 domains of DNMBP binds the GTPase dynamin, which plays an important role in the fission of endocytic vesicles. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212728  Cd Length: 51  Bit Score: 36.34  E-value: 3.36e-03
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|.
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYV 56
Cdd:cd11794    1 VVRAIFDFCPSVSEELPLFAGDVIEVLKVVDEFWLLGTKEGVTGQFPSSFV 51
SH3_Tec cd11905
Src Homology 3 domain of Tec (Tyrosine kinase expressed in hepatocellular carcinoma); Tec is a ...
6-58 3.47e-03

Src Homology 3 domain of Tec (Tyrosine kinase expressed in hepatocellular carcinoma); Tec is a cytoplasmic (or nonreceptor) tyr kinase containing Src homology protein interaction domains (SH3, SH2) N-terminal to the catalytic tyr kinase domain. It also contains an N-terminal pleckstrin homology (PH) domain, which binds the products of PI3K and allows membrane recruitment and activation, and the Tec homology (TH) domain, which contains proline-rich and zinc-binding regions. It is more widely-expressed than other Tec subfamily kinases. Tec is found in endothelial cells, both B- and T-cells, and a variety of myeloid cells including mast cells, erythroid cells, platelets, macrophages and neutrophils. Tec is a key component of T-cell receptor (TCR) signaling, and is important in TCR-stimulated proliferation, IL-2 production and phospholipase C-gamma1 activation. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212838 [Multi-domain]  Cd Length: 56  Bit Score: 36.72  E-value: 3.47e-03
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*.
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGtlNDK---TGWFPSNYVNE 58
Cdd:cd11905    2 IVVAMYDFQPTEPHDLRLETGEEYVILEKNDVHWWKA--RDKygkEGYIPSNYVTG 55
SH3_SASH1 cd11967
Src homology 3 domain of SAM And SH3 Domain Containing Protein 1; SASH1 is a potential tumor ...
7-57 3.62e-03

Src homology 3 domain of SAM And SH3 Domain Containing Protein 1; SASH1 is a potential tumor suppressor in breast and colon cancer. Its decreased expression is associated with aggressive tumor growth, metastasis, and poor prognosis. It is widely expressed in normal tissues (except lymphocytes and dendritic cells) and is localized in the nucleus and the cytoplasm. SASH1 interacts with the oncoprotein cortactin and is important in cell migration and adhesion. It is a member of the SLY family of proteins, which are adaptor proteins containing a central conserved region with a bipartite nuclear localization signal (NLS) as well as SAM (sterile alpha motif) and SH3 domains. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212900  Cd Length: 57  Bit Score: 36.56  E-value: 3.62e-03
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|.
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLNDKTGWFPSNYVN 57
Cdd:cd11967    5 VHTDFTPSPYDTDSLKLKKGDIIDIISKPPMGTWMGLLNNKVGTFKFIYVD 55
SH3_Src cd12008
Src homology 3 domain of Src Protein Tyrosine Kinase; Src (or c-Src) is a cytoplasmic (or ...
9-56 4.36e-03

Src homology 3 domain of Src Protein Tyrosine Kinase; Src (or c-Src) is a cytoplasmic (or non-receptor) PTK and is the vertebrate homolog of the oncogenic protein (v-Src) from Rous sarcoma virus. Together with other Src subfamily proteins, it is involved in signaling pathways that regulate cytokine and growth factor responses, cytoskeleton dynamics, cell proliferation, survival, and differentiation. Src also play a role in regulating cell adhesion, invasion, and motility in cancer cells, and tumor vasculature, contributing to cancer progression and metastasis. Elevated levels of Src kinase activity have been reported in a variety of human cancers. Several inhibitors of Src have been developed as anti-cancer drugs. Src is also implicated in acute inflammatory responses and osteoclast function. Src kinases contain an N-terminal SH4 domain with a myristoylation site, followed by SH3 and SH2 domains, a tyr kinase domain, and a regulatory C-terminal region containing a conserved tyr. They are activated by autophosphorylation at the tyr kinase domain, but are negatively regulated by phosphorylation at the C-terminal tyr by Csk (C-terminal Src Kinase). The SH3 domain of Src kinases contributes to substrate recruitment by binding adaptor proteins/substrates, and regulation of kinase activity through an intramolecular interaction. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212941 [Multi-domain]  Cd Length: 56  Bit Score: 36.24  E-value: 4.36e-03
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|
gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQREDGGWW--EGTLNDKTGWFPSNYV 56
Cdd:cd12008    4 ALYDYESRTETDLSFKKGERLQIVNNTEGDWWlaHSLTTGQTGYIPSNYV 53
SH3_MPP5 cd12036
Src Homology 3 domain of Membrane Protein, Palmitoylated 5 (or MAGUK p55 subfamily member 5); ...
21-41 4.78e-03

Src Homology 3 domain of Membrane Protein, Palmitoylated 5 (or MAGUK p55 subfamily member 5); MPP5, also called PALS1 (Protein associated with Lin7) or Nagie oko protein in zebrafish or Stardust in Drosophila, is a scaffolding protein which associates with Crumbs homolog 1 (CRB1), CRB2, or CRB3 through its PDZ domain and with PALS1-associated tight junction protein (PATJ) or multi-PDZ domain protein 1 (MUPP1) through its L27 domain. The resulting tri-protein complexes are core proteins of the Crumb complex, which localizes at tight junctions or subapical regions, and is involved in the maintenance of apical-basal polarity in epithelial cells and the morphogenesis and function of photoreceptor cells. MPP5 is critical for the proper stratification of the retina and is also expressed in T lymphocytes where it is important for TCR-mediated activation of NFkB. Drosophila Stardust exists in several isoforms, some of which show opposing functions in photoreceptor cells, which suggests that the relative ratio of different Crumbs complexes regulates photoreceptor homeostasis. MPP5 contains two L27 domains followed by the core of three domains characteristic of MAGUK (membrane-associated guanylate kinase) proteins: PDZ, SH3, and guanylate kinase (GuK). In addition, it also contains the Hook (Protein 4.1 Binding) motif in between the SH3 and GuK domains. The GuK domain in MAGUK proteins is enzymatically inactive; instead, the domain mediates protein-protein interactions and associates intramolecularly with the SH3 domain. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212969  Cd Length: 63  Bit Score: 36.24  E-value: 4.78e-03
                         10        20
                 ....*....|....*....|.
gi 221476505  21 LCFQKGDVITVTQREDGGWWE 41
Cdd:cd12036   23 LSFQKGDILHVISQEDPNWWQ 43
SH3_Nephrocystin cd11770
Src Homology 3 domain of Nephrocystin (or Nephrocystin-1); Nephrocystin contains an SH3 domain ...
7-56 5.43e-03

Src Homology 3 domain of Nephrocystin (or Nephrocystin-1); Nephrocystin contains an SH3 domain involved in signaling pathways that regulate cell adhesion and cytoskeletal organization. It is a protein that in humans is associated with juvenile nephronophthisis, an inherited kidney disease characterized by renal fibrosis that lead to chronic renal failure in children. It is localized in cell-cell junctions in renal duct cells, and is known to interact with Ack1, an activated Cdc42-associated kinase. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212704 [Multi-domain]  Cd Length: 54  Bit Score: 36.14  E-value: 5.43e-03
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|.
gi 221476505   7 VQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEG-TLNDKTGWFPSNYV 56
Cdd:cd11770    2 YEALSDFQAEQEGDLSFKKGEVLRIISKRADGWWLAeNSKGNRGLVPKTYL 52
SH3_Caskin1 cd12062
Src Homology 3 domain of CASK interacting protein 1; Caskin1 is a multidomain adaptor protein ...
21-56 5.98e-03

Src Homology 3 domain of CASK interacting protein 1; Caskin1 is a multidomain adaptor protein that contains six ankyrin repeats, a single SH3 domain, tandem sterile alpha motif (SAM) domains, and a long disordered proline-rich region. It is expressed at high levels in the brain and is localized in presynaptic regions. It binds to the multidomain scaffolding protein CASK through the CaMK domain in competition with Munc-interacting protein 1 (Mint1). CASK participates in one of two evolutionarily conserved tripartite complexes containing either Mint1 and Velis or Caskin1 and Velis. Caskin1 may play a role in infantile myoclonic epilepsy. SH3 domains bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs; they play a role in the regulation of enzymes by intramolecular interactions, changing the subcellular localization of signal pathway components and mediate multiprotein complex assemblies.


Pssm-ID: 212995  Cd Length: 62  Bit Score: 36.13  E-value: 5.98e-03
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|..
gi 221476505  21 LCFQKGDVITVTQREDGGWWEG------TLNDKTGWFPSNYV 56
Cdd:cd12062   18 LNIKAGDVITVLEQHPDGRWKGcihdnrTGNDRVGYFPSSLV 59
SH3_Intersectin2_4 cd11994
Fourth Src homology 3 domain (or SH3D) of Intersectin-2; Intersectin-2 (ITSN2) is an adaptor ...
6-56 6.88e-03

Fourth Src homology 3 domain (or SH3D) of Intersectin-2; Intersectin-2 (ITSN2) is an adaptor protein that functions in exo- and endocytosis, actin cytoskeletal reorganization, and signal transduction. It plays a role in clathrin-coated pit (CCP) formation. It binds to many proteins through its multidomain structure and facilitate the assembly of multimeric complexes. ITSN2 also functions as a specific GEF for Cdc42 activation in epithelial morphogenesis, and is required in mitotic spindle orientation. It exists in alternatively spliced short and long isoforms. The short isoform contains two Eps15 homology domains (EH1 and EH2), a coiled-coil region and five SH3 domains (SH3A-E), while the long isoform, in addition, contains RhoGEF (also called Dbl-homologous or DH), Pleckstrin homology (PH) and C2 domains. The fourth SH3 domain (or SH3D) of ITSN2 is expected to bind protein partners, similar to ITSN1 which has been shown to bind SHIP2, Numb, CdGAP, and N-WASP. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212927  Cd Length: 59  Bit Score: 36.06  E-value: 6.88e-03
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*.
gi 221476505   6 VVQAEYSFMGSNNDELCFQKGDVITVTQREDGGWWEGTLN-----DKTGWFPSNYV 56
Cdd:cd11994    1 IAQVTTAYVASGVEQLSLSPGQLILILKKNSSGWWLGELQargkkRQKGWFPASHV 56
SH3_Abl cd11850
Src homology 3 domain of the Protein Tyrosine Kinase, Abelson kinase; Abl (or c-Abl) is a ...
9-56 7.76e-03

Src homology 3 domain of the Protein Tyrosine Kinase, Abelson kinase; Abl (or c-Abl) is a ubiquitously-expressed cytoplasmic (or nonreceptor) PTK that contains SH3, SH2, and tyr kinase domains in its N-terminal region, as well as nuclear localization motifs, a putative DNA-binding domain, and F- and G-actin binding domains in its C-terminal tail. It also contains a short autoinhibitory cap region in its N-terminus. Abl function depends on its subcellular localization. In the cytoplasm, Abl plays a role in cell proliferation and survival. In response to DNA damage or oxidative stress, Abl is transported to the nucleus where it induces apoptosis. In chronic myelogenous leukemia (CML) patients, an aberrant translocation results in the replacement of the first exon of Abl with the BCR (breakpoint cluster region) gene. The resulting BCR-Abl fusion protein is constitutively active and associates into tetramers, resulting in a hyperactive kinase sending a continuous signal. This leads to uncontrolled proliferation, morphological transformation and anti-apoptotic effects. BCR-Abl is the target of selective inhibitors, such as imatinib (Gleevec), used in the treatment of CML. Abl2, also known as ARG (Abelson-related gene), is thought to play a cooperative role with Abl in the proper development of the nervous system. The Tel-ARG fusion protein, resulting from reciprocal translocation between chromosomes 1 and 12, is associated with acute myeloid leukemia (AML). SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212784  Cd Length: 56  Bit Score: 35.47  E-value: 7.76e-03
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|.
gi 221476505   9 AEYSFMGSNNDELCFQKGDVITVTQREDGGWW---EGTLNDKTGWFPSNYV 56
Cdd:cd11850    4 ALYDFVASGENQLSIKKGEQLRVLGYNKNGEWceaESKSTGGQGWVPSNYI 54
SH3_MPP cd11862
Src Homology 3 domain of Membrane Protein, Palmitoylated (or MAGUK p55 subfamily member) ...
21-53 8.40e-03

Src Homology 3 domain of Membrane Protein, Palmitoylated (or MAGUK p55 subfamily member) proteins; The MPP/p55 subfamily of MAGUK (membrane-associated guanylate kinase) proteins includes at least eight vertebrate members (MPP1-7 and CASK), four Drosophila proteins (Stardust, Varicose, CASK and Skiff), and other similar proteins; they all contain one each of the core of three domains characteristic of MAGUK proteins: PDZ, SH3, and guanylate kinase (GuK). In addition, most members except for MPP1 contain N-terminal L27 domains and some also contain a Hook (Protein 4.1 Binding) motif in between the SH3 and GuK domains. CASK has an additional calmodulin-dependent kinase (CaMK)-like domain at the N-terminus. Members of this subfamily are scaffolding proteins that play important roles in regulating and establishing cell polarity, cell adhesion, and synaptic targeting and transmission, among others. The GuK domain in MAGUK proteins is enzymatically inactive; instead, the domain mediates protein-protein interactions and associates intramolecularly with the SH3 domain. SH3 domains are protein interaction domains that bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs. They play versatile and diverse roles in the cell including the regulation of enzymes, changing the subcellular localization of signaling pathway components, and mediating the formation of multiprotein complex assemblies.


Pssm-ID: 212796  Cd Length: 61  Bit Score: 35.63  E-value: 8.40e-03
                         10        20        30
                 ....*....|....*....|....*....|....*..
gi 221476505  21 LCFQKGDVITVTQREDGGWW----EGTLNDKTGWFPS 53
Cdd:cd11862   23 LSFKKGDILQIVNQDDPNWWqarkVGDPNGRAGLIPS 59
PH_alsin cd13269
Alsin Pleckstrin homology (PH) domain; The ALS2 gene encodes alsin, a GEF, that has dual ...
297-372 9.64e-03

Alsin Pleckstrin homology (PH) domain; The ALS2 gene encodes alsin, a GEF, that has dual specificity for Rac1 and Rab5 GTPases. Alsin mutations in the form of truncated proteins are responsible for motor function disorders including juvenile-onset amyotrophic lateral sclerosis, familial juvenile primary lateral sclerosis, and infantile-onset ascending hereditary spastic paralysis. The alsin protein is widely expressed in the developing CNS including neurons of the cerebral cortex, brain stem, spinal cord, and cerebellum. Alsin contains a regulator of chromosome condensation 1 (RCC1) domain, a Rho guanine nucleotide exchanging factor (RhoGEF) domain, a PH domain, a Membrane Occupation and Recognition Nexus (MORN), a vacuolar protein sorting 9 (Vps9) domain, and a Dbl homology (DH) domain. Alsin interacts with Rab5 through its Vps9 domain and through this interaction modulates early endosome fusion and trafficking. The GEF activity of alsin towards Rab5 is regulated by Rac1 function. The GEF activity of alsin for Rac1 occurs via its DH domain and this interaction plays a role in promoting spinal motor neuron survival via multiple Rac-dependent signaling pathways. PH domains have diverse functions, but in general are involved in targeting proteins to the appropriate cellular location or in the interaction with a binding partner. They share little sequence conservation, but all have a common fold, which is electrostatically polarized. Less than 10% of PH domains bind phosphoinositide phosphates (PIPs) with high affinity and specificity. PH domains are distinguished from other PIP-binding domains by their specific high-affinity binding to PIPs with two vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3 which results in targeting some PH domain proteins to the plasma membrane. A few display strong specificity in lipid binding. Any specificity is usually determined by loop regions or insertions in the N-terminus of the domain, which are not conserved across all PH domains. PH domains are found in cellular signaling proteins such as serine/threonine kinase, tyrosine kinases, regulators of G-proteins, endocytotic GTPases, adaptors, as well as cytoskeletal associated molecules and in lipid associated enzymes.


Pssm-ID: 241423  Cd Length: 106  Bit Score: 36.60  E-value: 9.64e-03
                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 221476505 297 YFVLFPQTLLFLSVSqrmSAFIYegklPLTGIIVNRLEDTDALKNAFEISSPLiDRIVAVCQGPNEANKWVELLNA 372
Cdd:cd13269   31 WFILFNDALVHAQFS---THHIF----PLATLWVEPIPDEDSGQNALKITTPE-ESFTLVASTPQEKAEWLRAINQ 98
 
Blast search parameters
Data Source: Precalculated data, version = cdd.v.3.21
Preset Options:Database: CDSEARCH/cdd   Low complexity filter: no  Composition Based Adjustment: yes   E-value threshold: 0.01

References:

  • Wang J et al. (2023), "The conserved domain database in 2023", Nucleic Acids Res.51(D)384-8.
  • Lu S et al. (2020), "The conserved domain database in 2020", Nucleic Acids Res.48(D)265-8.
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