FERM domain C-lobe of Protein 4.1 family; The protein 4.1 family includes four well-defined members: erythroid protein 4.1 (4.1R), the best known and characterized member, 4.1G (general), 4.1N (neuronal), and 4.1 B (brain). The less well understood 4.1O/FRMD3 is not a true member of this family and is not included in this hierarchy. Besides three highly conserved domains, FERM, SAB (spectrin and actin binding domain) and CTD (C-terminal domain), the proteins from this family contain several unique domains: U1, U2 and U3. FERM domains like other members of the FERM domain superfamily have a cloverleaf architecture with three distinct lobes: (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 brain is a particularly rich source of protein 4.1 isoforms. The various 4.1R, 4.1G, 4.1N, and 4.1B mRNAs are all expressed in distinct patterns within the brain. It is likely that 4.1 proteins play important functional roles in the brain including motor coordination and spatial learning, postmitotic differentiation, and synaptic architecture and function. In addition they are found in nonerythroid, nonneuronal cells where they may play a general structural role in nuclear architecture and/or may interact with splicing factors. The FERM C domain is the third structural domain within the FERM domain. 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 665402097  219 YGVDLHPAKDSEGVDIMLGVCASGLLVYRDKLRINRFAWPKILKISYKRHHFYIKIRPGEFEQYESTIGFKLANHRAAKK 298
Cdd:cd13184     1 YGVDLHPAKDSEGVDIMLGVCSSGLLVYRDRLRINRFAWPKVLKISYKRNNFYIKIRPGEFEQYETTIGFKLPNHRAAKR 80

                          90
                  ....*....|....
gi 665402097  299 LWKSCVEHHTFFRL 312
Cdd:cd13184    81 LWKVCVEHHTFFRL 94

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 665402097  1611 DTPGFSGHGEIISTQTVSSKTRTVETIT--YKTERDGIVETRVEQKITIQSDGDpIDHDKALAEAIQEATAMNPDMTVEK 1688
Cdd:pfam05902   21 DGRGDSDPGVLVSAQTITSETQSTTTTThiTKTVKGGISETRIEKRIVITGDAD-IDHDQALAQAIKEAKEQHPDMSVTK 99

                   ....*...
gi 665402097  1689 IEIQQQTQ 1696
Cdd:pfam05902  100 VVVHKETE 107

FERM domain C-lobe of Protein 4.1 family; The protein 4.1 family includes four well-defined members: erythroid protein 4.1 (4.1R), the best known and characterized member, 4.1G (general), 4.1N (neuronal), and 4.1 B (brain). The less well understood 4.1O/FRMD3 is not a true member of this family and is not included in this hierarchy. Besides three highly conserved domains, FERM, SAB (spectrin and actin binding domain) and CTD (C-terminal domain), the proteins from this family contain several unique domains: U1, U2 and U3. FERM domains like other members of the FERM domain superfamily have a cloverleaf architecture with three distinct lobes: (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 brain is a particularly rich source of protein 4.1 isoforms. The various 4.1R, 4.1G, 4.1N, and 4.1B mRNAs are all expressed in distinct patterns within the brain. It is likely that 4.1 proteins play important functional roles in the brain including motor coordination and spatial learning, postmitotic differentiation, and synaptic architecture and function. In addition they are found in nonerythroid, nonneuronal cells where they may play a general structural role in nuclear architecture and/or may interact with splicing factors. The FERM C domain is the third structural domain within the FERM domain. 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 665402097  219 YGVDLHPAKDSEGVDIMLGVCASGLLVYRDKLRINRFAWPKILKISYKRHHFYIKIRPGEFEQYESTIGFKLANHRAAKK 298
Cdd:cd13184     1 YGVDLHPAKDSEGVDIMLGVCSSGLLVYRDRLRINRFAWPKVLKISYKRNNFYIKIRPGEFEQYETTIGFKLPNHRAAKR 80

                          90
                  ....*....|....
gi 665402097  299 LWKSCVEHHTFFRL 312
Cdd:cd13184    81 LWKVCVEHHTFFRL 94

FERM C-terminal PH-like domain;

                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 665402097   228 DSEGVDIMLGVCASGLLVYRDKLRI-NRFAWPKILKISYKRHHFYIKIRpgeFEQYESTIGFKLANHRAAKKLWKSCVEH 306
Cdd:pfam09380    1 DKEGTDLWLGVSAKGILVYEDNNKIlNLFPWREIRKISFKRKKFLIKLR---DKSSEETLGFYTESSRACKYLWKLCVEQ 77

                   ....*..
gi 665402097   307 HTFFRLM 313
Cdd:pfam09380   78 HTFFRLR 84

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 665402097  123 TRYHLCLQVRNDILEGRLPCTFVTHALLGSYLVQSEMGDYDAEEmPTRAYLKDFKIAPNQT------AELEDKVMDLHKT 196
Cdd:cd14473     1 TRYLLYLQVKRDILEGRLPCSEETAALLAALALQAEYGDYDPSE-HKPKYLSLKRFLPKQLlkqrkpEEWEKRIVELHKK 79

                          90       100
                  ....*....|....*....|
gi 665402097  197 HKGQSPAEAELHYLENAKKL 216
Cdd:cd14473    80 LRGLSPAEAKLKYLKIARKL 99

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 665402097   324 FPVFGSTYRYKGRTQAEST--NTPVDRTPPKFNRTLSGARLTS 364
Cdd:pfam08736    2 FFSLGSKFRYSGRTQKQTVedSSEILRPQPEFERSPSKRYPSR 44

FERM domain C-lobe of Protein 4.1 family; The protein 4.1 family includes four well-defined members: erythroid protein 4.1 (4.1R), the best known and characterized member, 4.1G (general), 4.1N (neuronal), and 4.1 B (brain). The less well understood 4.1O/FRMD3 is not a true member of this family and is not included in this hierarchy. Besides three highly conserved domains, FERM, SAB (spectrin and actin binding domain) and CTD (C-terminal domain), the proteins from this family contain several unique domains: U1, U2 and U3. FERM domains like other members of the FERM domain superfamily have a cloverleaf architecture with three distinct lobes: (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 brain is a particularly rich source of protein 4.1 isoforms. The various 4.1R, 4.1G, 4.1N, and 4.1B mRNAs are all expressed in distinct patterns within the brain. It is likely that 4.1 proteins play important functional roles in the brain including motor coordination and spatial learning, postmitotic differentiation, and synaptic architecture and function. In addition they are found in nonerythroid, nonneuronal cells where they may play a general structural role in nuclear architecture and/or may interact with splicing factors. The FERM C domain is the third structural domain within the FERM domain. 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 665402097  219 YGVDLHPAKDSEGVDIMLGVCASGLLVYRDKLRINRFAWPKILKISYKRHHFYIKIRPGEFEQYESTIGFKLANHRAAKK 298
Cdd:cd13184     1 YGVDLHPAKDSEGVDIMLGVCSSGLLVYRDRLRINRFAWPKVLKISYKRNNFYIKIRPGEFEQYETTIGFKLPNHRAAKR 80

                          90
                  ....*....|....
gi 665402097  299 LWKSCVEHHTFFRL 312
Cdd:cd13184    81 LWKVCVEHHTFFRL 94

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 665402097  218 MYGVDLHPAKDSEGVDIMLGVCASGLLVYRDKLRINRFAWPKILKISYKRHHFYIKIRPGEFEQYESTIGFKLANHRAAK 297
Cdd:cd13189     1 LYGVELHSARDSNNLELQIGVSSAGILVFQNGIRINTFPWSKIVKISFKRKQFFIQLRREPNESRDTILGFNMLSYRACK 80

                          90
                  ....*....|....*
gi 665402097  298 KLWKSCVEHHTFFRL 312
Cdd:cd13189    81 NLWKSCVEHHTFFRL 95

FERM C-terminal PH-like domain;

                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 665402097   228 DSEGVDIMLGVCASGLLVYRDKLRI-NRFAWPKILKISYKRHHFYIKIRpgeFEQYESTIGFKLANHRAAKKLWKSCVEH 306
Cdd:pfam09380    1 DKEGTDLWLGVSAKGILVYEDNNKIlNLFPWREIRKISFKRKKFLIKLR---DKSSEETLGFYTESSRACKYLWKLCVEQ 77

                   ....*..
gi 665402097   307 HTFFRLM 313
Cdd:pfam09380   78 HTFFRLR 84

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 665402097  123 TRYHLCLQVRNDILEGRLPCTFVTHALLGSYLVQSEMGDYDAEEmPTRAYLKDFKIAPNQT------AELEDKVMDLHKT 196
Cdd:cd14473     1 TRYLLYLQVKRDILEGRLPCSEETAALLAALALQAEYGDYDPSE-HKPKYLSLKRFLPKQLlkqrkpEEWEKRIVELHKK 79

                          90       100
                  ....*....|....*....|
gi 665402097  197 HKGQSPAEAELHYLENAKKL 216
Cdd:cd14473    80 LRGLSPAEAKLKYLKIARKL 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
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*..
gi 665402097   35 RVTLLDGSLLDVSIDRKAIGRDVINSICAGLNLIEKDYFGLTYETPTDPRTWLDLEKPVSKFF-RTDTWPLTFAVKF 110
Cdd:cd01765     4 RVRLLDGTELTLEVSKKATGQELFDKVCEKLNLLEKDYFGLFYEDNDGQKHWLDLDKKISKQLkRSGPYQFYFRVKF 80

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 665402097  205 AELHYLENAKKLAMYGVDLHPAKDSEGVDIMLGVCASGLLVYRDKLRINRFAWPKILKISYKRHHFYIKIRpgEFEQYES 284
Cdd:cd13192     1 AEDNFLRKAATLETYGVDPHPVKDHRGNQLYLGFTHTGIVTFQGGKRVHHFRWNDITKFNYEGKMFILHVM--QKEEKKH 78

                          90       100
                  ....*....|....*....|....*..
gi 665402097  285 TIGFKLANHRAAKKLWKSCVEHHTFFR 311
Cdd:cd13192    79 TLGFKCPTPAACKHLWKCAVEQQAFYT 105

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 665402097   35 RVTLLDGSLLDVSIDRKAIGRDVINSICAGLNLIEKDYFGLTYETPTDPRTWLDLEKPVSKFFRTDTWP-LTFAVKFYPP 113
Cdd:cd17098     4 KVQMLDDTVHIFQVQQKALGEVLFDQVCKHLNLLESDYFGLEFTDPEGNKCWLDPEKPILRQVKRPKDVvFKFVVKFYTP 83

                  ..
gi 665402097  114 EP 115
Cdd:cd17098    84 DP 85

FERM (Four.1 protein, Ezrin, Radixin, Moesin) domain, F1 sub-domain, found in erythrocyte membrane protein band 4.1 (EPB41) and similar proteins; EPB41, also termed protein 4.1 (P4.1), or 4.1R, or Band 4.1, or EPB4.1, belongs to the skeletal protein 4.1 family that is involved in cellular processes such as cell adhesion, migration and signaling. EPB41 is a widely expressed cytoskeletal phosphoprotein that stabilizes the spectrin-actin cytoskeleton and anchors the cytoskeleton to the cell membrane. EPB41 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 665402097   35 RVTLLDGSLLDVSIDRKAIGRDVINSICAGLNLIEKDYFGLT-YETPTDpRTWLDLEKPVSKFFRTDTWPLTFAVKFYPP 113
Cdd:cd17105     4 KVSLLDDTVYECEVEKHAKGQDLFKKVCEHLNLLEEDYFGLAiWDSPTS-KTWLDPAKEIKKQVHGGPWEFTFNVKFYPP 82

                  .
gi 665402097  114 E 114
Cdd:cd17105    83 D 83

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 665402097   33 LARVTLLDGSLLDVSIDRKAIGRDVINSICAGLNLIEKDYFGLTYETPTDPRTWLDLEKPVSKFFRTDTWPLTFAVKFYP 112
Cdd:cd17202     3 LCKVTLLDGTEYSCDLEKRAKGQVLFDKVCEHLNLLEKDYFGLLYQVSANQKNWLDSTKEIKRQIRRLPWLFTFNVKFYP 82

                  ..
gi 665402097  113 PE 114
Cdd:cd17202    83 PD 84

FERM N-terminal domain; This domain is the N-terminal ubiquitin-like structural domain of the FERM domain.

                           10        20        30        40        50        60
                   ....*....|....*....|....*....|....*....|....*....|....*....|...
gi 665402097    36 VTLLDGSLLDVSIDRKAIGRDVINSICAGLNLIEKDYFGLTYETPTDPRTWLDLEKPVSKFFR 98
Cdd:pfam09379    1 VRLLDGTVLEFDVQPKATGQVLLDQVCNHLNLKEKDYFGLQFLDDNGEHRWLDLSKRLSKQAP 63

FERM (Four.1 protein, Ezrin, Radixin, Moesin) domain, F1 sub-domain, found in FERM domain-containing protein 3 (FRMD3) and similar proteins; FRMD3, also termed band 4.1-like protein 4O, or ovary type protein 4.1 (4.1O), belongs to the 4.1 protein superfamily, which share the highly conserved membrane-association FERM 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). FRMD3 is involved in maintaining cell shape and integrity. It also functions as a tumour suppressor in non-small cell lung carcinoma (NSCLC). Some single nucleotide polymorphisms (SNPs) located in FRMD3 have been associated with diabetic kidney disease (DKD) in different ethnicities.

                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....
gi 665402097   36 VTLL-DGSLLDVSIDRKAIGRDVINSICAGLNLIEKDYFGLTYETPTDPRTWLDLEKPVSKFFRtDTWPLT--FAVKFY 111
Cdd:cd17102     5 IRLLdDSEVICCEFKKDTKGQFLLDYVCNYLNLLEKDYFGLRYVDTEKQRHWLDPNKSIYKQLK-GVPPYVlcFRVKFY 82

FERM (Four.1 protein, Ezrin, Radixin, Moesin) domain, F1 sub-domain, found in FERM, ARH/RhoGEF and pleckstrin domain-containing protein 2 (FARP2) and similar proteins; 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. FARP2 contains a FERM domain, a Dbl-homology (DH) domain and two pleckstrin homology (PH) domains. 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 665402097   35 RVTLLDGSLLDVSIDRKAIGRDVINSICAGLNLIEKDYFGLTYETPTDPRTWLDLEKPVSK-FFRTDTWPLTFAVKFYPP 113
Cdd:cd17190     4 RVKLLDNTTEPLEIEPKADGQALLSQVFKRLNLVESDYFGLEFQNSQSNWIWLEPMKLIVKqVRRPKNTKLRLAVKFFPP 83

                  ..
gi 665402097  114 EP 115
Cdd:cd17190    84 DP 85

FERM domain C-lobe of Protein tyrosine phosphatase non-receptor proteins 14 and 21 (PTPN14 and 21); This CD contains PTP members: pez/PTPN14 and PTPN21. A number of mutations in Pez have been shown to be associated with breast and colorectal cancer. The PTPN protein family belong to larger family of PTPs. PTPs are known to be signaling molecules that regulate a variety of cellular processes including cell growth, differentiation, mitotic cycle, and oncogenic transformation. The members are composed of a N-terminal FERM domain and a C-terminal PTP catalytic 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. Like most other ERM members they have a phosphoinositide-binding site in their FERM domain. The FERM C domain is the third structural domain within the FERM domain. 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.

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                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 665402097  219 YGVDLHPAKDSEGVDIMLGVCASGLLVYRDKLRINR-FAWPKILKISYKRHHFYIkirpgEFEQYESTIGFKLANHRAAK 297
Cdd:cd13188     1 YGEESFPAKDEQGNEVLIGASLEGIFVKHDNGRPPVfFRWEDIKNVINHKRTFSI-----ECQNSEETVQFQFEDAETAK 75

                          90
                  ....*....|....*.
gi 665402097  298 KLWKSCVEHHTFFRLM 313
Cdd:cd13188    76 YVWKLCVLQHKFYRQN 91

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).

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                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 665402097   35 RVTLLDGSLLDVSIDRKAIGRDVINSICAGLNLIEKDYFGLTYETPTDPRTWLDLEKPVSKFFRTdtwPLT----FAVKF 110
Cdd:cd17188     5 KVQFLDDSQKVFVVDQKSTGKDLFNMSCSHLNLVEKEYFGLEFRNHAGNNVWLELLKPITKQIKN---PKElifkFTVKF 81

                  ....*
gi 665402097  111 YPPEP 115
Cdd:cd17188    82 FPVDP 86

FERM (Four.1 protein, Ezrin, Radixin, Moesin) domain, F1 sub-domain, found in FERM, ARH/RhoGEF and pleckstrin domain-containing protein 1 (FARP1); 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. As a novel downstream signaling partner of Rif, FARP1 is involved in the regulation of semaphorin signaling in neurons. FARP1 contains a FERM domain, a Dbl-homology (DH) domain and two pleckstrin homology (PH) domains. 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 665402097   35 RVTLLDGSLLDVSIDRKAIGRDVINSICAGLNLIEKDYFGLTYETPTDPRTWLDLEKPVSKFFRTDTWP-LTFAVKFYPP 113
Cdd:cd17189     4 KVQMLDDTQEVFEVPQRAPGKVLLDAVCSHLNLVEGDYFGLEFQDHRKVMVWLDLLKPIVKQIRRPKHVvLRFVVKFFPP 83

                  .
gi 665402097  114 E 114
Cdd:cd17189    84 D 84

FERM (Four.1 protein, Ezrin, Radixin, Moesin) domain, F1 sub-domain, found in tyrosine-protein phosphatase non-receptor type 3 (PTPN3) and similar proteins; This family includes two tyrosine-protein phosphatase non-receptors, PTPN3 and PTPN4, both of which belong 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).

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                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 665402097   36 VTLLDGSLLDVSIDRKAIGRDVINSICAGLNLIEKDYFGLTY-ETPTDPRT--WLDLEKPVSKFFRTD-TWPLTFAVKFY 111
Cdd:cd17100     6 VHFLDDTEQTFEVEKRDKGQVLLDKVFNHLELVEKDYFGLQFsDDSPATDSmrWLDPLKPIRKQIKGGpPYYLNFRVKFY 85

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 665402097   35 RVTLLDGSLLDVSIDRKAIGRDVINSICAGLNLIEKDYFGLTYETPTDPRTWLDLEKPVSKFFRTDT-WPLTFAVKFYPP 113
Cdd:cd17205     6 RVSLLDGTDVSVDLPKKAKGQELFEQIMYHLDLIEKDYFGLRFMDSAQVAHWLDVTKSIKKQVKIGPpYCLHLRVKFYSS 85

                  .
gi 665402097  114 E 114
Cdd:cd17205    86 E 86

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 665402097   33 LARVTLLDGSLLDVSIDRKAIGRDVINSICAGLNLIEKDYFGLTYETPTDPRTWLDLEKPVSKffRTDTWPLT----FAV 108
Cdd:cd17192     5 VARIQLLNNEFVEFTLSVESTGQECLEAVAQRLELREITYFSLWYYNKQNQQRWVDLEKPLKK--QLDKYALEptvyFGV 82

                  ....*
gi 665402097  109 KFYPP 113
Cdd:cd17192    83 VFYVP 87

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
                  ....*....|....*....|....*....|....*....|....*....|....*....|
gi 665402097  218 MYGVDLHPAKDSEGVDIMLGVCASGLLVYR--DKL--RINrFAWPKILKISYKRHHFYIK 273
Cdd:cd13194     1 MYGVNYFEIKNKKGTDLWLGVDALGLNIYEpdNKLtpKIG-FPWSEIRNISFNDKKFVIK 59

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 665402097   35 RVTLLDGSLLDVSIDRKAIGRDVINSICAGLNLIEKDYFGLTYETPTDPRTWLDLEKPVSKF-FRTDTWPLT--FAVKFY 111
Cdd:cd17200     6 QVHLLDDRKLELLVQPKLLSRELLDLVASHFNLKEKEYFGITFIDDTGQSNWLQLDHRVLDHdLPKKSGPVTlyFAVRFY 85

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.

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                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 665402097   33 LARVTLLDGSLLDVSIDRKAIGRDVINSICAGLNLIEKDYFGLTYETPTDPRTWLDLEKPVSKFF-RTDTWPLT-FAVKF 110
Cdd:cd17191     5 VTRIRLLDSNVIECTLSVESTGQECLEAVAQRLELRETHYFGLWFLSKSQQARWVELEKPLKKQLdKFANEPLLfFGVMF 84

                  ...
gi 665402097  111 YPP 113
Cdd:cd17191    85 YVP 87

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 665402097   324 FPVFGSTYRYKGRTQAEST--NTPVDRTPPKFNRTLSGARLTS 364
Cdd:pfam08736    2 FFSLGSKFRYSGRTQKQTVedSSEILRPQPEFERSPSKRYPSR 44

FERM (Four.1 protein, Ezrin, Radixin, Moesin) domain, F1 sub-domain, found in Ezrin and similar proteins; Ezrin, also termed cytovillin, or villin-2, or p81, is a member of the ezrin/radixin/moesin (ERM) family of cytoskeletal proteins that plays an essential role in microvilli formation, T-cell activation, and tumor metastasis through providing a regulated linkage between F-actin and membrane-associated proteins. These proteins may also function in signaling cascades that regulate the assembly of actin stress fibers. The ERM proteins consist of an N-terminal FERM domain, a coiled-coil (CC) domain and a C-terminal tail segment (C-tail) containing a well-defined actin-binding motif. The C-terminal domain can fold back to bind to the FERM domain forming an autoinhibited conformation. The FERM domain 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). Ezrin is a tyrosine kinase substrate that functions as a cross-linker between actin cytoskeleton and plasma membrane. It has been implicated in the regulation of the proliferation, apoptosis, adhesion, invasion, metastasis and angiogenesis of cancer cells.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 665402097   30 KPALARVTLLDGSLlDVSIDRKAIGRDVINSICAGLNLIEKDYFGLTYETPTDPRTWLDLEKPVSKFFRTDTWPLTFA-- 107
Cdd:cd17239     1 KPINVRVTTMDAEL-EFAIQPNTTGKQLFDQVVKTIGLREVWYFGLQYVDNKGFPTWLKLDKKVSAQEVRKENPLQFKfr 79

                  ....*
gi 665402097  108 VKFYP 112
Cdd:cd17239    80 AKFYP 84

FERM (Four.1 protein, Ezrin, Radixin, Moesin) domain, F1 sub-domain, found in the ERM family proteins, Ezrin, Radixin, and Moesin; The ezrin-radixin-moesin (ERM) family includes a group of closely related cytoskeletal proteins that plays an essential role in microvilli formation, T-cell activation, and tumor metastasis through providing a regulated linkage between F-actin and membrane-associated proteins. These proteins may also function in signaling cascades that regulate the assembly of actin stress fibers. The ERM proteins consist of an N-terminal FERM domain, a coiled-coil (CC) domain and a C-terminal tail segment (C-tail) containing a well-defined actin-binding motif. They 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 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).

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                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 665402097   35 RVTLLDGSLlDVSIDRKAIGRDVINSICAGLNLIEKDYFGLTYETPTDPRTWLDLEKPV-SKFFRTDTwPLTFA--VKFY 111
Cdd:cd17187     4 RVTTMDAEL-EFAIQPNTTGKQLFDQVVKTIGLREIWFFGLQYVDSKGYSTWLKLNKKVlSQDVKKEN-PLQFKfrAKFY 81

                  .
gi 665402097  112 P 112
Cdd:cd17187    82 P 82

FERM (Four.1 protein, Ezrin, Radixin, Moesin) domain, F1 sub-domain, found in FERM domain-containing protein 1 (FRMD1); FRMD1 is an uncharacterized FERM domain-containing 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
                  ....*....|....*....|....*....|....*....|....*....|....*....|...
gi 665402097   35 RVTLLDGSLLDVSIDRKAIGRDVINSICAGLNLIEKDYFGLTYeTPTDPRTWLDLEKPVSKFF 97
Cdd:cd17197     5 CVLLPNKEQLSLTVGVKATGQELFQQVCELLKIKEAHFFGLSV-VKNNEHIFMDLEQKLSKYF 66

FERM (Four.1 protein, Ezrin, Radixin, Moesin) domain, F1 sub-domain, found in radixin and similar proteins; Radixin is a member of the ezrin/radixin/moesin (ERM) family of cytoskeletal proteins that plays an essential role in microvilli formation, T-cell activation, and tumor metastasis through providing a regulated linkage between F-actin and membrane-associated proteins. These proteins may also function in signaling cascades that regulate the assembly of actin stress fibers. The ERM proteins consist of an N-terminal FERM domain, a coiled-coil (CC) domain and a C-terminal tail segment (C-tail) containing a well-defined actin-binding motif. The C-terminal domain can fold back to bind to the FERM domain forming an autoinhibited conformation. 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). Radixin plays important roles in cell polarity, cell motility, invasion and tumor progression. It mediates the binding of F-actin to the plasma membrane after a conformational activation through Akt2-dependent phosphorylation at Thr564. It is also involved in reversal learning and short-term memory by regulating synaptic GABAA receptor density.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 665402097   35 RVTLLDGSLlDVSIDRKAIGRDVINSICAGLNLIEKDYFGLTYETPTDPRTWLDLEKPVSKFFRTDTWPLTFA--VKFYP 112
Cdd:cd17238     4 RVTTMDAEL-EFAIQPNTTGKQLFDQVVKTVGLREVWFFGLQYVDSKGYSTWLKLNKKVTQQDVKKENPLQFKfrAKFFP 82