Band 4.1 homologues; Also known as ezrin/radixin/moesin (ERM) protein domains. Present in myosins, ezrin, radixin, moesin, protein tyrosine phosphatases. Plasma membrane-binding domain. These proteins play structural and regulatory roles in the assembly and stabilization of specialized plasmamembrane domains. Some PDZ domain containing proteins bind one or more of this family. Now includes JAKs.

                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686  213 CKVTLLDGTEYSCDLEKRAKGQVLFDKVCEHLNLLEKDYFGLLF-QESPEQKNWLDPAKEIKRQLRN-LPWLFTFNVKFY 290
Cdd:smart00295   2 LKVYLLDGTTLEFEVDSSTTAEELLETVCRKLGIRESEYFGLQFeDPDEDLRHWLDPAKTLLDQDVKsEPLTLYFRVKFY 81

                           90       100       110       120       130       140       150       160
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686  291 PPDPSQLTEDITRY-FLCLQLRQDIASGRLPCSFVTHALLGSYTLQAELGDYDPEEH-GSIDLSEFQFAPTQT------K 362
Cdd:smart00295  82 PPDPNQLKEDPTRLnLLYLQVRNDILEGRLPCPEEEALLLAALALQAEFGDYDEELHdLRGELSLKRFLPKQLldsrklK 161

                          170       180       190       200
                   ....*....|....*....|....*....|....*....|
gi 1622930686  363 ELEEKVAELHKTHRGLSPAQADSQFLENAKRLSMYGVDLH 402
Cdd:smart00295 162 EWRERIVELHKELIGLSPEEAKLKYLELARKLPTYGVELF 201

4.1 protein C-terminal domain (CTD); At the C-terminus of all known 4.1 proteins is a sequence domain unique to these proteins, known as the C-terminal domain (CTD). Mammalian CTDs are associated with a growing number of protein-protein interactions, although such activities have yet to be associated with invertebrate CTDs. Mammalian CTDs are generally defined by sequence alignment as encoded by exons 18-21. Comparison of known vertebrate 4.1 proteins with invertebrate 4.1 proteins indicates that mammalian 4.1 exon 19 represents a vertebrate adaptation that extends the sequence of the CTD with a Ser/Thr-rich sequence. The CTD was first described as a 22/24-kDa domain by chymotryptic digestion of erythrocyte 4.1 (4.1R). CTD is thought to represent an independent folding structure which has gained function since the divergence of vertebrates from invertebrates.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686 833 KEVPIVQTETKTITYESPQIDGGAGGDSGTLLTAQTITSESVSTTTTTHITKTVKGGISETRIEKRIVITGDADIDHDQA 912
Cdd:pfam05902   1 KEVPIVHTETKTITYESSQVDGRGDSDPGVLVSAQTITSETQSTTTTTHITKTVKGGISETRIEKRIVITGDADIDHDQA 80

                          90       100
                  ....*....|....*....|....*..
gi 1622930686 913 LAQAIREAREQHPDMSVTRVVVHKETE 939
Cdd:pfam05902  81 LAQAIKEAKEQHPDMSVTKVVVHKETE 107

MAEBL; Provisional

                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686    4 EVGSASEVKKDSGQLGTDATK--EKPKEVAENQQNQSSDLEEEKGSQPAPAAESQSSLRRQKREKEtSESRGISRFLPPW 81
Cdd:PTZ00121  1550 ELKKAEELKKAEEKKKAEEAKkaEEDKNMALRKAEEAKKAEEARIEEVMKLYEEEKKMKAEEAKKA-EEAKIKAEELKKA 1628

                           90       100       110       120       130       140       150       160
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686   82 LKKQKSYTLVVAKDGGDKKEPTQAVVEEQVLD-KEEPLPEEQRQDKGDAEEM------AQKKQQEIKVEvKEEKPSVSKV 154
Cdd:PTZ00121  1629 EEEKKKVEQLKKKEAEEKKKAEELKKAEEENKiKAAEEAKKAEEDKKKAEEAkkaeedEKKAAEALKKE-AEEAKKAEEL 1707

                          170       180       190       200       210       220
                   ....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686  155 ETQPTELVSKEREEKvKETQEDKFEGEAAKRETKEvqtNELKAEKASQKVTKKTKTVQCK 214
Cdd:PTZ00121  1708 KKKEAEEKKKAEELK-KAEEENKIKAEEAKKEAEE---DKKKAEEAKKDEEEKKKIAHLK 1763

Band 4.1 homologues; Also known as ezrin/radixin/moesin (ERM) protein domains. Present in myosins, ezrin, radixin, moesin, protein tyrosine phosphatases. Plasma membrane-binding domain. These proteins play structural and regulatory roles in the assembly and stabilization of specialized plasmamembrane domains. Some PDZ domain containing proteins bind one or more of this family. Now includes JAKs.

                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686  213 CKVTLLDGTEYSCDLEKRAKGQVLFDKVCEHLNLLEKDYFGLLF-QESPEQKNWLDPAKEIKRQLRN-LPWLFTFNVKFY 290
Cdd:smart00295   2 LKVYLLDGTTLEFEVDSSTTAEELLETVCRKLGIRESEYFGLQFeDPDEDLRHWLDPAKTLLDQDVKsEPLTLYFRVKFY 81

                           90       100       110       120       130       140       150       160
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686  291 PPDPSQLTEDITRY-FLCLQLRQDIASGRLPCSFVTHALLGSYTLQAELGDYDPEEH-GSIDLSEFQFAPTQT------K 362
Cdd:smart00295  82 PPDPNQLKEDPTRLnLLYLQVRNDILEGRLPCPEEEALLLAALALQAEFGDYDEELHdLRGELSLKRFLPKQLldsrklK 161

                          170       180       190       200
                   ....*....|....*....|....*....|....*....|
gi 1622930686  363 ELEEKVAELHKTHRGLSPAQADSQFLENAKRLSMYGVDLH 402
Cdd:smart00295 162 EWRERIVELHKELIGLSPEEAKLKYLELARKLPTYGVELF 201

FERM (Four.1 protein, Ezrin, Radixin, Moesin) domain, F1 sub-domain, found in erythrocyte membrane protein band 4.1-like protein 2 (EPB41L2) and similar proteins; EPB41L2, also termed generally expressed protein 4.1 (4.1G), belongs to the skeletal protein 4.1 family that is involved in cellular processes such as cell adhesion, migration and signaling. EPB41L2 contains a FERM domain, a spectrin and actin binding (SAB) domain, and a C-terminal domain. The FERM domain is made up of three sub-domains, F1, F2, and F3. This family corresponds to the F1 sub-domain, which is also called the N-terminal ubiquitin-like structural domain of the FERM domain (FERM_N).

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686 210 TVQCKVTLLDGTEYSCDLEKRAKGQVLFDKVCEHLNLLEKDYFGLLFQESPEQKNWLDPAKEIKRQLRNLPWLFTFNVKF 289
Cdd:cd17202     1 TVLCKVTLLDGTEYSCDLEKRAKGQVLFDKVCEHLNLLEKDYFGLLYQVSANQKNWLDSTKEIKRQIRRLPWLFTFNVKF 80

                  ....
gi 1622930686 290 YPPD 293
Cdd:cd17202    81 YPPD 84

FERM central domain; This domain is the central structural domain of the FERM domain.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686 292 PDPSQLTEDITRYFLCLQLRQDIASGRLPCSFVTHALLGSYTLQAELGDYDPEEHGSIDLSEFQFAPTQ------TKELE 365
Cdd:pfam00373   1 DLELLLQDEVTRHLLYLQAKDDILEGRLPCSEEEALLLAALQLQAEFGDYQPSSHTSEYLSLESFLPKQllrkmkSKELE 80

                          90       100       110
                  ....*....|....*....|....*....|....*..
gi 1622930686 366 EKVAELHKTHRGLSPAQADSQFLENAKRLSMYGVDLH 402
Cdd:pfam00373  81 KRVLEAHKNLRGLSAEEAKLKYLQIAQSLPTYGVEFF 117

FERM adjacent (FA); This region is found adjacent to Band 4.1 / FERM domains (pfam00373) in a subset of FERM containing protein. The region has been hypothesized to play a role in regulatory adaptation, based on similarity to other protein kinase substrates.

                          10        20        30        40
                  ....*....|....*....|....*....|....*....|....
gi 1622930686 500 KFLTLGSKFRYSGRTQAQTRQASTLIDRPAPHFERTSSKRVSRS 543
Cdd:pfam08736   1 KFFSLGSKFRYSGRTQKQTVEDSSEILRPQPEFERSPSKRYPSR 44

Borrelia P83/100 protein; This family consists of several Borrelia P83/P100 antigen proteins.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686  14 DSGQLGTDATKEKPKEVAENQQNQSSDLEE--EKGSQPAPAAESQSSLRRQKREKETSESRGISRFLPPWLKKQKSYT-- 89
Cdd:pfam05262 173 DTDSISDKKVVEALREDNEKGVNFRRDMTDlkERESQEDAKRAQQLKEELDKKQIDADKAQQKADFAQDNADKQRDEVrq 252

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686  90 -LVVAKDGGDKKEPTQAVVEEQVLDKEEPLPEEQRQDKGDAEEMAQKKQQEIKVEVKEEKPSVSKVETQPTELVSKEREE 168
Cdd:pfam05262 253 kQQEAKNLPKPADTSSPKEDKQVAENQKREIEKAQIEIKKNDEEALKAKDHKAFDLKQESKASEKEAEDKELEAQKKREP 332

                         170
                  ....*....|....*.
gi 1622930686 169 KVKETQEDKFEGEAAK 184
Cdd:pfam05262 333 VAEDLQKTKPQVEAQP 348

Band 4.1 homologues; Also known as ezrin/radixin/moesin (ERM) protein domains. Present in myosins, ezrin, radixin, moesin, protein tyrosine phosphatases. Plasma membrane-binding domain. These proteins play structural and regulatory roles in the assembly and stabilization of specialized plasmamembrane domains. Some PDZ domain containing proteins bind one or more of this family. Now includes JAKs.

                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686  213 CKVTLLDGTEYSCDLEKRAKGQVLFDKVCEHLNLLEKDYFGLLF-QESPEQKNWLDPAKEIKRQLRN-LPWLFTFNVKFY 290
Cdd:smart00295   2 LKVYLLDGTTLEFEVDSSTTAEELLETVCRKLGIRESEYFGLQFeDPDEDLRHWLDPAKTLLDQDVKsEPLTLYFRVKFY 81

                           90       100       110       120       130       140       150       160
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686  291 PPDPSQLTEDITRY-FLCLQLRQDIASGRLPCSFVTHALLGSYTLQAELGDYDPEEH-GSIDLSEFQFAPTQT------K 362
Cdd:smart00295  82 PPDPNQLKEDPTRLnLLYLQVRNDILEGRLPCPEEEALLLAALALQAEFGDYDEELHdLRGELSLKRFLPKQLldsrklK 161

                          170       180       190       200
                   ....*....|....*....|....*....|....*....|
gi 1622930686  363 ELEEKVAELHKTHRGLSPAQADSQFLENAKRLSMYGVDLH 402
Cdd:smart00295 162 EWRERIVELHKELIGLSPEEAKLKYLELARKLPTYGVELF 201

FERM (Four.1 protein, Ezrin, Radixin, Moesin) domain, F1 sub-domain, found in erythrocyte membrane protein band 4.1-like protein 2 (EPB41L2) and similar proteins; EPB41L2, also termed generally expressed protein 4.1 (4.1G), belongs to the skeletal protein 4.1 family that is involved in cellular processes such as cell adhesion, migration and signaling. EPB41L2 contains a FERM domain, a spectrin and actin binding (SAB) domain, and a C-terminal domain. The FERM domain is made up of three sub-domains, F1, F2, and F3. This family corresponds to the F1 sub-domain, which is also called the N-terminal ubiquitin-like structural domain of the FERM domain (FERM_N).

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686 210 TVQCKVTLLDGTEYSCDLEKRAKGQVLFDKVCEHLNLLEKDYFGLLFQESPEQKNWLDPAKEIKRQLRNLPWLFTFNVKF 289
Cdd:cd17202     1 TVLCKVTLLDGTEYSCDLEKRAKGQVLFDKVCEHLNLLEKDYFGLLYQVSANQKNWLDSTKEIKRQIRRLPWLFTFNVKF 80

                  ....
gi 1622930686 290 YPPD 293
Cdd:cd17202    81 YPPD 84

FERM (Four.1 protein, Ezrin, Radixin, Moesin) domain, F1 sub-domain, found in erythrocyte membrane protein band 4.1-like protein 3 (EPB41L3) and similar proteins; EPB41L3, also termed 4.1B, or differentially expressed in adenocarcinoma of the lung protein 1 (DAL-1), belongs to the skeletal protein 4.1 family that is involved in cellular processes such as cell adhesion, migration and signaling. EPB41L3 is a tumor suppressor that has been implicated in a variety of meningiomas and carcinomas. EPB41L3 contains a FERM domain, a spectrin and actin binding (SAB) domain, and a C-terminal domain. The FERM domain is made up of three sub-domains, F1, F2, and F3. This family corresponds to the F1 sub-domain, which is also called the N-terminal ubiquitin-like structural domain of the FERM domain (FERM_N).

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686 210 TVQCKVTLLDGTEYSCDLEKRAKGQVLFDKVCEHLNLLEKDYFGLLFQESPEQKNWLDPAKEIKRQLRNLPWLFTFNVKF 289
Cdd:cd17203     1 NMQCKVTLLDGSEYTCEVEKRSKGQVLFDKVCEHLNLLEKDYFGLTYRDSENQKNWLDPAKEIKKQIRSGAWQFSFNVKF 80

                  ....
gi 1622930686 290 YPPD 293
Cdd:cd17203    81 YPPD 84

4.1 protein C-terminal domain (CTD); At the C-terminus of all known 4.1 proteins is a sequence domain unique to these proteins, known as the C-terminal domain (CTD). Mammalian CTDs are associated with a growing number of protein-protein interactions, although such activities have yet to be associated with invertebrate CTDs. Mammalian CTDs are generally defined by sequence alignment as encoded by exons 18-21. Comparison of known vertebrate 4.1 proteins with invertebrate 4.1 proteins indicates that mammalian 4.1 exon 19 represents a vertebrate adaptation that extends the sequence of the CTD with a Ser/Thr-rich sequence. The CTD was first described as a 22/24-kDa domain by chymotryptic digestion of erythrocyte 4.1 (4.1R). CTD is thought to represent an independent folding structure which has gained function since the divergence of vertebrates from invertebrates.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686 833 KEVPIVQTETKTITYESPQIDGGAGGDSGTLLTAQTITSESVSTTTTTHITKTVKGGISETRIEKRIVITGDADIDHDQA 912
Cdd:pfam05902   1 KEVPIVHTETKTITYESSQVDGRGDSDPGVLVSAQTITSETQSTTTTTHITKTVKGGISETRIEKRIVITGDADIDHDQA 80

                          90       100
                  ....*....|....*....|....*..
gi 1622930686 913 LAQAIREAREQHPDMSVTRVVVHKETE 939
Cdd:pfam05902  81 LAQAIKEAKEQHPDMSVTKVVVHKETE 107

FERM domain C-lobe of Protein tyrosine phosphatase non-receptor proteins 3 and 4 (PTPN4 and PTPN3); PTPN4 (also called PTPMEG, protein tyrosine phosphatase, megakaryocyte) is a cytoplasmic protein-tyrosine phosphatase (PTP) thought to play a role in cerebellar function. PTPMEG-knockout mice have impaired memory formation and cerebellar long-term depression. PTPN3/PTPH1 is a membrane-associated PTP that is implicated in regulating tyrosine phosphorylation of growth factor receptors, p97 VCP (valosin-containing protein, or Cdc48 in Saccharomyces cerevisiae), and HBV (Hepatitis B Virus) gene expression; it is mutated in a subset of colon cancers. PTPMEG and PTPN3/PTPH1 contains a N-terminal FERM domain, a middle PDZ domain, and a C-terminal phosphatase domain. PTP1/Tyrosine-protein phosphatase 1 from nematodes and a FERM_C repeat 1 from Tetraodon nigroviridis are also included in this cd. The FERM domain has a cloverleaf tripart structure composed of: (1) FERM_N (A-lobe or F1); (2) FERM_M (B-lobe, or F2); and (3) FERM_C (C-lobe or F3). The C-lobe within the FERM domain is part of the PH domain family. The FERM domain is found in the cytoskeletal-associated proteins such as ezrin, moesin, radixin, 4.1R, and merlin. These proteins provide a link between the membrane and cytoskeleton and are involved in signal transduction pathways. The FERM domain is also found in protein tyrosine phosphatases (PTPs) , the tyrosine kinases FAK and JAK, in addition to other proteins involved in signaling. This domain is structurally similar to the PH and PTB domains and consequently is capable of binding to both peptides and phospholipids at different sites.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686 396 MYGVDLHHAKDSEGVDIKLGVCANGLLIYKDRLRINRFAWPKILKISYKRSNFYIKVRPAELEQFESTIGFKLPNHRAAK 475
Cdd:cd13189     1 LYGVELHSARDSNNLELQIGVSSAGILVFQNGIRINTFPWSKIVKISFKRKQFFIQLRREPNESRDTILGFNMLSYRACK 80

                          90
                  ....*....|....*
gi 1622930686 476 RLWKVCVEHHTFYRL 490
Cdd:cd13189    81 NLWKSCVEHHTFFRL 95

FERM C-terminal PH-like domain;

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686 406 DSEGVDIKLGVCANGLLIYKDRLRI-NRFAWPKILKISYKRSNFYIKVRpaeLEQFESTIGFKLPNHRAAKRLWKVCVEH 484
Cdd:pfam09380   1 DKEGTDLWLGVSAKGILVYEDNNKIlNLFPWREIRKISFKRKKFLIKLR---DKSSEETLGFYTESSRACKYLWKLCVEQ 77

                  ....*.
gi 1622930686 485 HTFYRL 490
Cdd:pfam09380  78 HTFFRL 83

FERM domain B-lobe; The FERM domain has a cloverleaf tripart structure (FERM_N, FERM_M, FERM_C/N, alpha-, and C-lobe/A-lobe, B-lobe, C-lobe/F1, F2, F3). The FERM domain is found in the cytoskeletal-associated proteins such as ezrin, moesin, radixin, 4.1R, and merlin. These proteins provide a link between the membrane and cytoskeleton and are involved in signal transduction pathways. The FERM domain is also found in protein tyrosine phosphatases, the tyrosine kinases FAK and JAK, in addition to other proteins involved in signaling. This domain is structurally similar to the pleckstrin homology (PH) and phosphotyrosine binding (PTB) domains and consequently is capable of binding to both peptides and phospholipids at different sites.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686 302 TRYFLCLQLRQDIASGRLPCSFVTHALLGSYTLQAELGDYDPEEHGSIDLSEFQFAPTQT------KELEEKVAELHKTH 375
Cdd:cd14473     1 TRYLLYLQVKRDILEGRLPCSEETAALLAALALQAEYGDYDPSEHKPKYLSLKRFLPKQLlkqrkpEEWEKRIVELHKKL 80

                          90
                  ....*....|....*....
gi 1622930686 376 RGLSPAQADSQFLENAKRL 394
Cdd:cd14473    81 RGLSPAEAKLKYLKIARKL 99

FERM (Four.1 protein, Ezrin, Radixin, Moesin) domain, F0 sub-domain and F1 sub-domain, found in FERM (Four.1/Ezrin/Radixin/Moesin) family proteins; FERM (Four.1 protein, Ezrin, Radixin, Moesin) domain is present at the N-terminus of a large and diverse group of proteins that mediate linkage of the cytoskeleton to the plasma membrane. FERM-containing proteins are ubiquitous components of the cytocortex and are involved in cell transport, cell structure and signaling functions. The FERM domain is made up of three sub-domains, F1, F2, and F3. The family corresponds to the F1 sub-domain, which is also called the N-terminal ubiquitin-like structural domain of the FERM domain (FERM_N), which is structurally similar to ubiquitin.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686 211 VQCKVTLLDGTEYSCDLEKRAKGQVLFDKVCEHLNLLEKDYFGLLFQESPEQKNWLDPAKEIKRQLRN-LPWLFTFNVKF 289
Cdd:cd01765     1 ISCRVRLLDGTELTLEVSKKATGQELFDKVCEKLNLLEKDYFGLFYEDNDGQKHWLDLDKKISKQLKRsGPYQFYFRVKF 80

FERM (Four.1 protein, Ezrin, Radixin, Moesin) domain, F1 sub-domain, found in FERM, RhoGEF and pleckstrin domain-containing protein 1 (FARP1) and similar proteins; This family includes the F1 sub-domain of FERM, RhoGEF and pleckstrin domain-containing proteins FARP1, FARP2, and FERM domain-containing protein 7 (FRMD7). FARP1, also termed chondrocyte-derived ezrin-like protein (CDEP), or pleckstrin homology (PH) domain-containing family C member 2 (PLEKHC2), is a neuronal activator of the RhoA GTPase. It promotes outgrowth of developing motor neuron dendrites. It also regulates excitatory synapse formation and morphology, as well as activates the GTPase Rac1 to promote F-actin assembly. FARP2, also termed FERM domain including RhoGEF (FIR), or Pleckstrin homology (PH) domain-containing family C member 3, is a Dbl-family guanine nucleotide exchange factor (GEF) that activates Rac1 or Cdc42 in response to upstream signals, suggesting roles in regulating processes such as neuronal axon guidance and bone homeostasis. It is also a key molecule involved in the response of neuronal growth cones to class-3 semaphorins. FRMD7 plays an important role in neuronal development and is involved in the regulation of F-actin, neurofilament, and microtubule dynamics. All family members contain a FERM domain that is made up of three sub-domains, F1, F2, and F3. This family corresponds to F1 sub-domain, which is also called the N-terminal ubiquitin-like structural domain of the FERM domain (FERM_N).

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686 211 VQCKVTLLDGTEYSCDLEKRAKGQVLFDKVCEHLNLLEKDYFGLLFQESPEQKNWLDPAKEIKRQLRNLP-WLFTFNVKF 289
Cdd:cd17098     1 LHVKVQMLDDTVHIFQVQQKALGEVLFDQVCKHLNLLESDYFGLEFTDPEGNKCWLDPEKPILRQVKRPKdVVFKFVVKF 80

                  ....*
gi 1622930686 290 YPPDP 294
Cdd:cd17098    81 YTPDP 85

FERM domain C-lobe of Novel band 4.1-like protein 4 and 5 (NBL4 and 5); NBL4 (also called Erythrocyte protein band 4.1-like 4; Epb4 1l4) plays a role the beta-catenin/Tcf signaling pathway and is thought to be involved in establishing the cell polarity or proliferation. NBL4 may be also involved in adhesion, in cell motility and/or in cell-to-cell communication. No role for NBL5 has been proposed to date. Both NBL4 and NBL5 contain a N-terminal FERM domain which has a cloverleaf tripart structure composed of: (1) FERM_N (A-lobe or F1); (2) FERM_M (B-lobe, or F2); and (3) FERM_C (C-lobe or F3). The C-lobe is a member of the PH superfamily. The FERM domain is found in the cytoskeletal-associated proteins such as ezrin, moesin, radixin, 4.1R, and merlin. These proteins provide a link between the membrane and cytoskeleton and are involved in signal transduction pathways. The FERM domain is also found in protein tyrosine phosphatases (PTPs) , the tyrosine kinases FAK and JAK, in addition to other proteins involved in signaling. This domain is structurally similar to the PH and PTB domains and consequently is capable of binding to both peptides and phospholipids at different sites.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686 398 GVDLHHAKDSEGVDIKLGVCANGLLIYKDRLRINRFAWPKILKISYKRSNFYIKVRPAELEQFESTIGFKLPNHRAAKRL 477
Cdd:cd13186     1 GVDLHPVKGEDGNEYFLGLTPTGILVFENKTKIGLFFWPRITKLDFKGKKLKLVVKEKDDQEQEHTFVFRLPNKKACKHL 80

                          90
                  ....*....|..
gi 1622930686 478 WKVCVEHHTFYR 489
Cdd:cd13186    81 WKCAVEHHAFFR 92

FERM (Four.1 protein, Ezrin, Radixin, Moesin) domain, F1 sub-domain, found in erythrocyte membrane protein band 4.1-like 5 (EPB41L5); EPB41L5 is a mesenchymal-specific protein that is an integral component of the ARF6-based pathway. It is normally induced during epithelial-mesenchymal transition (EMT) by an EMT-related transcriptional factor, ZEB1, which drives ARF6-based invasion, metastasis and drug resistance. EPB41L5 also binds to paxillin to enhance integrin/paxillin association, and thus promotes focal adhesion dynamics. Moreover, EPB41L5 acts as a substrate for the E3 ubiquitin ligase Mind bomb 1 (Mib1), which is essential for activation of Notch signaling. EPB41L5 is a member of the band 4.1/Nbl4 (novel band 4.1-like protein 4) group of the FERM protein superfamily. It contains a FERM domain that is made up of three sub-domains, F1, F2, and F3. This family corresponds to the F1 sub-domain, which is also called the N-terminal ubiquitin-like structural domain of the FERM domain (FERM_N).

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686 211 VQCKVTLLDGTEYSCDLEKRAKGQVLFDKVCEHLNLLEKDYFGLLFQESPEQKNWLDPAKEIKRQLR-NLPWLFTFNVKF 289
Cdd:cd17205     3 ITCRVSLLDGTDVSVDLPKKAKGQELFEQIMYHLDLIEKDYFGLRFMDSAQVAHWLDVTKSIKKQVKiGPPYCLHLRVKF 82

                  .
gi 1622930686 290 Y 290
Cdd:cd17205    83 Y 83

FERM (Four.1 protein, Ezrin, Radixin, Moesin) domain, F1 sub-domain, found in erythrocyte band 4.1-like protein 4A (EPB41L4A) and similar proteins; EPB41L4A, also termed protein NBL4, is a member of the band 4.1/Nbl4 (novel band 4.1-like protein 4) group of the FERM protein superfamily. It contains a FERM domain that is made up of three sub-domains, F1, F2, and F3. This family corresponds to the F1 sub-domain, which is also called the N-terminal ubiquitin-like structural domain of the FERM domain (FERM_N). EPB41L4A is an important component of the beta-catenin/Tcf pathway. It may be related to determination of cell polarity or proliferation.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686 212 QCKVTLLDGTEYSCDLE----KRAKGQVLFDKVCEHLNLLEKDYFGLLFQESPEQKNWLDPAKEIKRQLRNL--PWLFTF 285
Cdd:cd17107     4 YCEIVLLDESELILTIQqdgiKSSKGSVVLDVVFQHLNLLETDYFGLRYIDRQHQTHWLDPAKTLSEQLKLIgpPYTLYF 83

                  ....*...
gi 1622930686 286 NVKFYPPD 293
Cdd:cd17107    84 GVKFYAED 91

FERM domain C-lobe of FERM domain-containing protein 3 and 5 (FRMD3 and 5); FRMD3 (also called Band 4.1-like protein 4O/4.1O though it is not a true member of that family) is a novel putative tumor suppressor gene that is implicated in the origin and progression of lung cancer. In humans there are 5 isoforms that are produced by alternative splicing. Less is known about FRMD5, though there are 2 isoforms of the human protein are produced by alternative splicing. Both FRMD3 and FRMD5 contain a N-terminal FERM domain, followed by a FERM adjacent (FA) domain, and 4.1 protein C-terminal domain (CTD). The FERM domain has a cloverleaf tripart structure composed of: (1) FERM_N (A-lobe or F1); (2) FERM_M (B-lobe, or F2); and (3) FERM_C (C-lobe or F3). The C-lobe/F3 within the FERM domain is part of the PH domain family. The FERM domain is found in the cytoskeletal-associated proteins such as ezrin, moesin, radixin, 4.1R, and merlin. These proteins provide a link between the membrane and cytoskeleton and are involved in signal transduction pathways. The FERM domain is also found in protein tyrosine phosphatases (PTPs), the tyrosine kinases FAK and JAK, in addition to other proteins involved in signaling. This domain is structurally similar to the PH and PTB domains and consequently is capable of binding to both peptides and phospholipids at different sites.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686 383 ADSQFLENAKRLSMYGVDLHHAKDSEGVDIKLGVCANGLLIYKDRLRINRFAWPKILKISYKRSNFYIKVRPAelEQFES 462
Cdd:cd13192     1 AEDNFLRKAATLETYGVDPHPVKDHRGNQLYLGFTHTGIVTFQGGKRVHHFRWNDITKFNYEGKMFILHVMQK--EEKKH 78

                          90       100
                  ....*....|....*....|....*..
gi 1622930686 463 TIGFKLPNHRAAKRLWKVCVEHHTFYR 489
Cdd:cd13192    79 TLGFKCPTPAACKHLWKCAVEQQAFYT 105

FERM domain C-lobe; The FERM domain has a cloverleaf tripart structure composed of: (1) FERM_N (A-lobe or F1); (2) FERM_M (B-lobe, or F2); and (3) FERM_C (C-lobe or F3). The C-lobe/F3 within the FERM domain is part of the PH domain family. The FERM domain is found in the cytoskeletal-associated proteins such as ezrin, moesin, radixin, 4.1R, and merlin. These proteins provide a link between the membrane and cytoskeleton and are involved in signal transduction pathways. The FERM domain is also found in protein tyrosine phosphatases (PTPs), the tyrosine kinases FAK and JAK, in addition to other proteins involved in signaling. This domain is structurally similar to the PH and PTB domains and consequently is capable of binding to both peptides and phospholipids at different sites.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686 398 GVDLHHAKDSE--GVDIKLGVCANGLLIYKDR--LRINRFAWPKILKISYKRSN-FYIKVRPaelEQFESTIGFKLPNhR 472
Cdd:cd00836     1 GVEFFPVKDKSkkGSPIILGVNPEGISVYDELtgQPLVLFPWPNIKKISFSGAKkFTIVVAD---EDKQSKLLFQTPS-R 76

                          90
                  ....*....|....*..
gi 1622930686 473 AAKRLWKVCVEHHTFYR 489
Cdd:cd00836    77 QAKEIWKLIVGYHRFLL 93

FERM (Four.1 protein, Ezrin, Radixin, Moesin) domain, F1 sub-domain, found in FERM domain-containing protein 7 (FRMD7); FRMD7 plays an important role in neuronal development and is involved in the regulation of F-actin, neurofilament, and microtubule dynamics. It interacts with the Rho GTPase regulator, RhoGDIalpha, and activates the Rho subfamily member Rac1, which regulates reorganization of actin filaments and controls neuronal outgrowth. Mutations in the FRMD7 gene are responsible for the X-linked idiopathic congenital nystagmus (ICN), a disease which affects ocular motor control. FRMD7 contains a FERM domain, and a pleckstrin homology (PH) domain. The FERM domain is made up of three sub-domains, F1, F2, and F3. This family corresponds to the F1 sub-domain, which is also called the N-terminal ubiquitin-like structural domain of the FERM domain (FERM_N).

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686 214 KVTLLDGTEYSCDLEKRAKGQVLFDKVCEHLNLLEKDYFGLLFQESPEQKNWLDPAKEIKRQLRNLPWL-FTFNVKFYPP 292
Cdd:cd17188     5 KVQFLDDSQKVFVVDQKSTGKDLFNMSCSHLNLVEKEYFGLEFRNHAGNNVWLELLKPITKQIKNPKELiFKFTVKFFPV 84

                  ..
gi 1622930686 293 DP 294
Cdd:cd17188    85 DP 86

FERM (Four.1 protein, Ezrin, Radixin, Moesin) domain, F1 sub-domain, found in E3 ubiquitin-protein ligase MYLIP and similar proteins; MYLIP, also termed inducible degrader of the LDL-receptor (Idol), or myosin regulatory light chain interacting protein (MIR), is an E3 ubiquitin-protein ligase that mediates ubiquitination and subsequent proteasomal degradation of myosin regulatory light chain (MRLC), LDLR, VLDLR and LRP8. Its activity depends on E2 ubiquitin-conjugating enzymes of the UBE2D family, including UBE2D1, UBE2D2, UBE2D3, and UBE2D4. MYLIP stimulates clathrin-independent endocytosis and acts as a sterol-dependent inhibitor of cellular cholesterol uptake by binding directly to the cytoplasmic tail of the LDLR and promoting its ubiquitination via the UBE2D1/E1 complex. The ubiquitinated LDLR then enters the multivesicular body (MVB) protein-sorting pathway and is shuttled to the lysosome for degradation. Moreover, MYLIP has been identified as a novel ERM-like protein that affects cytoskeleton interactions regulating cell motility, such as neurite outgrowth. The ERM proteins includes ezrin, radixin, and moesin, which are cytoskeletal effector proteins linking actin to membrane-bound proteins at the cell surface. MYLIP contains a FERM-domain and a C-terminal C3HC4-type RING-HC finger. The FERM domain is made up of three sub-domains, F1, F2, and F3. This family corresponds to the F1 sub-domain, which is also called the N-terminal ubiquitin-like structural domain of the FERM domain (FERM_N).

                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....
gi 1622930686 213 CKVTLLDGTEYSCDLEKRAKGQVLFDKVCEHLNLLEKDYFGLLFQESPEQKNWLDPAKEIKRQLRNL-PWLFTFNVKFY 290
Cdd:cd17104     3 CLVSQPDSVVIEVEVDPKANGQECLDKVCQKLGIIEKDYFGLQYTGPKGERLWLNLRNRISRQLPGPpPYRLRLRVKFF 81

FERM domain C-lobe of E3 ubiquitin ligase myosin regulatory light chain-interacting protein (MYLIP; also called inducible degrader of the LDL receptor, IDOL); MYLIP/IDOL is a regulator of the LDL receptor (LDLR) pathway via the nuclear receptor liver X receptor (LXR). In response to cellular cholesterol loading, the activation of LXR leads to the induction of MYLIP expression. MYLIP stimulates ubiquitination of the LDLR on its cytoplasmic tail, directing its degradation. The LXR-MYLIP-LDLR pathway provides a complementary pathway to sterol regulatory element-binding proteins for the feedback inhibition of cholesterol uptake. MYLIP has an N-terminal FERM domain and in some cases a C-terminal RING domain. The FERM domain has a cloverleaf tripart structure composed of: (1) FERM_N (A-lobe or F1); (2) FERM_M (B-lobe, or F2); and (3) FERM_C (C-lobe or F3). The C-lobe/F3 within the FERM domain is part of the PH domain family. The FERM domain is found in the cytoskeletal-associated proteins such as ezrin, moesin, radixin, 4.1R, and merlin. These proteins provide a link between the membrane and cytoskeleton and are involved in signal transduction pathways. The FERM domain is also found in protein tyrosine phosphatases (PTPs), the tyrosine kinases FAK and JAK, in addition to other proteins involved in signaling. This domain is structurally similar to the PH and PTB domains and consequently is capable of binding to both peptides and phospholipids at different sites.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686 397 YGVDLHHAKDSEGVDIKLGVCANGLLIYKDRLR-INRFAWPKILKISYKRSNFYIKVRpaeLEQFEST-IGFKLPNHRAA 474
Cdd:cd13195     1 YGVEFFEVRNIEGQKLLIGVGPHGITICNDDFEvIERIPYTAIQMATSSGRVFTLTYL---SDDGSVKvLEFKLPSTRAA 77

                          90
                  ....*....|....*
gi 1622930686 475 KRLWKVCVEHHTFYR 489
Cdd:cd13195    78 SGLYRAITEKHAFYR 92

FERM (Four.1 protein, Ezrin, Radixin, Moesin) domain, F1 sub-domain, found in tyrosine-protein phosphatase non-receptor type 3 (PTPN3); PTPN3, also termed protein-tyrosine phosphatase H1 (PTP-H1), belongs to the non-transmembrane FERM-containing protein-tyrosine phosphatase (PTP) subfamily characterized by a conserved N-terminal FERM domain, a PDZ domain, and a C-terminal PTP catalytic domain. The FERM domain is made up of three sub-domains, F1, F2, and F3. This family corresponds to the F1 sub-domain, which is also called the N-terminal ubiquitin-like structural domain of the FERM domain (FERM_N). PTPN3 associates with the mitogen-activated protein kinase p38gamma (also known as MAPK12) to form a PTPN3-p38gamma complex that promotes Ras-induced oncogenesis. It may also act as a tumor suppressor in lung cancer through its modulation of epidermal growth factor receptor (EGFR) signaling. Moreover, PTPN3 shows sensitizing effect to anti-estrogens. It dephosphorylates the tyrosine kinase EGFR, disrupts its interaction with the nuclear estrogen receptor, and increases breast cancer sensitivity to small molecule tyrosine kinase inhibitors (TKIs). It also cooperates with vitamin D receptor to stimulate breast cancer growth through their mutual stabilization.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686 211 VQCKVTLLDGTEYSCDLEKRAKGQVLFDKVCEHLNLLEKDYFGLLFQE-SPEQKNWLDPAKEIKRQLR-NLPWLFTFNVK 288
Cdd:cd17193     2 VICNVHFLDGSVQSFKVNKQDTGQVLLDMAYNHLGLTEREYFGLQHNEdSVDSPRWLEPSKPIRKQLKgGFPCSLHFRVR 81

                  ..
gi 1622930686 289 FY 290
Cdd:cd17193    82 FF 83

FERM domain C-lobe/F3 of the ERM family; The ERM family includes ezrin, radixin, moesin and merlin. They are composed of a N-terminal FERM (ERM) domain (also called N-ERMAD (N-terminal ERM association domain)), a coiled coil region (CRR), and a C-terminal domain CERMAD (C-terminal ERM association domain) which has an F-actin-binding site (ABD). Two actin-binding sites have been identified in the middle and N-terminal domains. Merlin is structurally similar to the ERM proteins, but instead of an actin-binding domain (ABD), it contains a C-terminal domain (CTD), just like the proteins from the 4.1 family. Activated ezrin, radixin and moesin are thought to be involved in the linking of actin filaments to CD43, CD44, ICAM1-3 cell adhesion molecules, various membrane channels and receptors, such as the Na+/H+ exchanger-3 (NHE3), cystic fibrosis transmembrane conductance regulator (CFTR), and the beta2-adrenergic receptor. The ERM proteins exist in two states, a dormant state in which the FERM domain binds to its own C-terminal tail and thereby precludes binding of some partner proteins, and an activated state, in which the FERM domain binds to one of many membrane binding proteins and the C-terminal tail binds to F-actin. The FERM domain has a cloverleaf tripart structure composed of: (1) FERM_N (A-lobe or F1); (2) FERM_M (B-lobe, or F2); and (3) FERM_C (C-lobe or F3). The C-lobe/F3 within the FERM domain of ERM is part of the PH domain family. The FERM domain is found in the cytoskeletal-associated proteins such as ezrin, moesin, radixin, 4.1R, and merlin. These proteins provide a link between the membrane and cytoskeleton and are involved in signal transduction pathways. The FERM domain is also found in protein tyrosine phosphatases (PTPs), the tyrosine kinases FAK and JAK, in addition to other proteins involved in signaling. This domain is structurally similar to the PH and PTB domains and consequently is capable of binding to both peptides and phospholipids at different sites.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686 396 MYGVDLHHAKDSEGVDIKLGVCANGLLIYK--DRL--RINrFAWPKILKISYKRSNFYIKVRPAELEQFEstigFKLPNH 471
Cdd:cd13194     1 MYGVNYFEIKNKKGTDLWLGVDALGLNIYEpdNKLtpKIG-FPWSEIRNISFNDKKFVIKPIDKKAPDFV----FYSPRL 75

                          90
                  ....*....|....*..
gi 1622930686 472 RAAKRLWKVCVEHHTFY 488
Cdd:cd13194    76 RINKRILDLCMGNHELY 92

FERM (Four.1 protein, Ezrin, Radixin, Moesin) domain, F1 sub-domain, found in tyrosine-protein phosphatase non-receptor type 13 (PTPN13) and similar proteins; This family includes tyrosine-protein phosphatase non-receptor type 13 (PTPN13), FERM and PDZ domain-containing protein 2 (FRMPD2), and FERM domain-containing proteins FRMD1 and FRMD6. All family members contain a FERM domain that is made up of three sub-domains, F1, F2, and F3. This family corresponds to the F1 sub-domain, which is also called the N-terminal ubiquitin-like structural domain of the FERM domain (FERM_N).

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686 215 VTLLDG--TEYSCDLekRAKGQVLFDKVCEHLNLLEKDYFGLLFQES-------PEQK-------NWLDPAKEIKRQLRN 278
Cdd:cd17101     6 VVLLNGqrLQVAVDV--KTTVQDLFDQVCDHLGLQETELFGLAVLKDgeyffldPDTKlskyapkGWKSEAKKGLKGGKP 83

                          90
                  ....*....|....
gi 1622930686 279 LPWLFtFNVKFYPP 292
Cdd:cd17101    84 VFTLY-FRVKFYVD 96

FERM (Four.1 protein, Ezrin, Radixin, Moesin) domain, F1 sub-domain, found in tyrosine-protein phosphatase non-receptor type 14 (PTPN14) and similar proteins; PTPN14, also termed protein-tyrosine phosphatase pez, or PTPD2, or PTP36, is a widely expressed non-transmembrane cytosolic protein tyrosine phosphatase (PTP). It belongs to the FERM family of PTPs characterized by a conserved N-terminal FERM domain and a C-terminal PTP catalytic domain with an intervening sequence containing an acidic region and a putative SH3 domain-binding sequence. The FERM domain is made up of three sub-domains, F1, F2, and F3. This family corresponds to the F1 sub-domain, which is also called the N-terminal ubiquitin-like structural domain of the FERM domain (FERM_N). PTPN14 plays a role in the nucleus during cell proliferation. It forms a complex with Kibra and LATS1 proteins and negatively regulates the key Hippo pathway protein Yes-associated protein (YAP) oncogenic function by controlling its localization. It specifically regulates p130 Crk-associated substrate (p130Cas) phosphorylation at tyrosine residue 128 (Y128) in colorectal cancer (CRC) cells. Moreover, PTPN14 may be a critical enzyme in regulating endothelial cell function. It plays a crucial role in organogenesis by inducing transforming growth factor beta (TGFbeta) and epithelial-mesenchymal transition (EMT). It also acts as a modifier of angiogenesis and hereditary haemorrhagic telangiectasia. It regulates the lymphatic function and choanal development through the interaction with the vascular endothelial growth factor receptor 3 (VEGFR3), a receptor tyrosine kinase essential for lymphangiogenesis. Furthermore, PTPN14 functions as a regulator of cell motility through its action on cell-cell adhesion. Beta-Catenin, a central component of adherens junctions, has been identified as a PTPN14 substrate. PTPN14 works as a novel sperm-motility biomarker and a potential mitochondrial protein.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686 214 KVTLLDGTEYSCDLEKRAKGQVLFDKVCEHLNLLEKDYFGLLFQESPEQKNWLDPAKEIKRQLR---NLPWLFtFNVKFY 290
Cdd:cd17191     7 RIRLLDSNVIECTLSVESTGQECLEAVAQRLELRETHYFGLWFLSKSQQARWVELEKPLKKQLDkfaNEPLLF-FGVMFY 85

                  ..
gi 1622930686 291 PP 292
Cdd:cd17191    86 VP 87

FERM (Four.1 protein, Ezrin, Radixin, Moesin) domain, F1 sub-domain, found in FERM domain-containing protein 4B (FRMD4B); FRMD4B, also termed GRP1-binding protein GRSP1, interacts with the coil-coil domain of ARF exchange factor GRP1 to form the Grsp1-Grp1 complex that co-localizes with cortical actin rich regions in response to stimulation of CHO-T cells with insulin or epidermal growth factor (EGF). FRMD4B contains a FERM protein interaction domain as well as two coiled coil domains and may therefore function as a scaffolding protein. The FERM domain is made up of three sub-domains, F1, F2, and F3. This family corresponds to the F1 sub-domain, which is also called the N-terminal ubiquitin-like structural domain of the FERM domain (FERM_N).

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686 213 CKVTLLDGTEYSCDLEKRAKGQVLFDKVCEHLNLLEKDYFGLLFQESPEQKNWLdpakEIKRQL-------RNLPWLFTF 285
Cdd:cd17200     5 CQVHLLDDRKLELLVQPKLLSRELLDLVASHFNLKEKEYFGITFIDDTGQSNWL----QLDHRVldhdlpkKSGPVTLYF 80

                  ....*
gi 1622930686 286 NVKFY 290
Cdd:cd17200    81 AVRFY 85

FERM (Four.1 protein, Ezrin, Radixin, Moesin) domain, F1 sub-domain, found in tyrosine-protein phosphatase non-receptor type 21 (PTPN21) and similar proteins; PTPN21, also termed protein-tyrosine phosphatase D1 (PTPD1), is a cytosolic non-receptor protein-tyrosine phosphatase (PTP) that belongs to the FERM family of PTPs characterized by a conserved N-terminal FERM domain and a C-terminal PTP catalytic domain with an intervening sequence containing an acidic region and a putative SH3 domain-binding sequence. The FERM domain is made up of three sub-domains, F1, F2, and F3. This family corresponds to the F1 sub-domain, which is also called the N-terminal ubiquitin-like structural domain of the FERM domain (FERM_N). PTPN21 interacts with a Tec tyrosine kinase family member, the epithelial and endothelial tyrosine kinase (Etk, also known as Bmx), modulates Stat3 activation, and plays a role in the regulation of cell growth and differentiation. It also associates with and activates Src tyrosine kinase, and directs epidermal growth factor (EGF)/Src signaling to the nucleus through activating ERK1/2- and Elk1-dependent gene transcription. PTPD1-Src complex interacts a protein kinase A-anchoring protein AKAP121 to forms a PTPD1-Src-AKAP121 complex, which is required for efficient maintenance of mitochondrial membrane potential and ATP oxidative synthesis. As a novel component of the endocytic pathway, PTPN21 supports EGF receptor stability and mitogenic signaling in bladder cancer cells. Moreover, PTPD1 regulates focal adhesion kinase (FAK) autophosphorylation and cell migration through modulating Src-FAK signaling at adhesion sites.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686 214 KVTLLDGTEYSCDLEKRAKGQVLFDKVCEHLNLLEKDYFGLLFQESPEQKNWLDPAKEIKRQLRNL---PWLFtFNVKFY 290
Cdd:cd17192     7 RIQLLNNEFVEFTLSVESTGQECLEAVAQRLELREITYFSLWYYNKQNQQRWVDLEKPLKKQLDKYalePTVY-FGVVFY 85

                  ..
gi 1622930686 291 PP 292
Cdd:cd17192    86 VP 87

FERM domain C-lobe of Protein tyrosine phosphatase non-receptor 13 (PTPH13); There are many functions of PTPN13 (also called PTPL1, PTP-BAS, hPTP1E, FAP1, or PTPL1). Mice lacking PTPN13 activity have abnormal regulation of signal transducer and activator of transcription signaling in their T cells, mild impairment of motor nerve repair, and a significant reduction in the growth of retinal glia cultures. It also plays a role in adipocyte differentiation. PTPN13 contains a kinase non-catalytic C-lobe domain (KIND), a FERM domain with two potential phosphatidylinositol 4,5-biphosphate [PtdIns(4,5)P2]-binding motifs, 5 PDZ domains, and a carboxy-terminal catalytic domain. There is an nteraction between the FERM domain of PTPL1 and PtdIns(4,5)P2 which is thought to regulate the membrane localization of PTPN13. PDZ are protein/protein interaction domains so there is the potential for numerous partners that can actively participate in the regulation of its phosphatase activity or can permit direct or indirect recruitment of tyrosine phosphorylated PTPL1 substrates. The FERM domain has a cloverleaf tripart structure composed of: (1) FERM_N (A-lobe or F1); (2) FERM_M (B-lobe, or F2); and (3) FERM_C (C-lobe or F3). The C-lobe/F3 within the FERM domain is part of the PH domain family. The FERM domain is found in the cytoskeletal-associated proteins such as ezrin, moesin, radixin, 4.1R, and merlin. These proteins provide a link between the membrane and cytoskeleton and are involved in signal transduction pathways. The FERM domain is also found in protein tyrosine phosphatases (PTPs), the tyrosine kinases FAK and JAK, in addition to other proteins involved in signaling. This domain is structurally similar to the PH and PTB domains and consequently is capable of binding to both peptides and phospholipids at different sites.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622930686 405 KDSEGVDIKLGVCANGLLIYKD----RLRINRFAWPKILKISYKRSNFYIKVRPAELEQFestiGFKLPNHRAAKRLWKV 480
Cdd:cd13187    11 KKSSTLSLWLGICSRGIIIYEEkngaRTPVLRFPWRETQKISFDKKKFTIESRGGSGIKH----TFYTDSYKKSQYLLQL 86