Description
Integrin alpha-V/beta-3 (ITGAV:ITGB3) is a receptor for cytotactin, fibronectin, laminin, matrix metalloproteinase-2, osteopontin, osteomodulin, prothrombin, thrombospondin, vitronectin and von Willebrand factor. Integrin alpha-IIB/beta-3 (ITGA2B:ITGB3) is a receptor for fibronectin, fibrinogen, plasminogen, prothrombin, thrombospondin and vitronectin. Integrins alpha-IIB/beta-3 and alpha-V/beta-3 recognize the sequence R-G-D in a wide array of ligands. Integrin alpha-IIB/beta-3 recognizes the sequence H-H-L-G-G-G-A-K-Q-A-G-D-V in fibrinogen gamma chain. Following activation integrin alpha-IIB/beta-3 brings about platelet/platelet interaction through binding of soluble fibrinogen. This step leads to rapid platelet aggregation which physically plugs ruptured endothelial surfaces. Fibrinogen binding enhances SELP expression in activated platelets (PubMed:19332769). ITGAV:ITGB3 binds to fractalkine (CX3CL1) and acts as its coreceptor in CX3CR1-dependent fractalkine signaling. ITGAV:ITGB3 binds to NRG1 (via EGF domain) and this binding is essential for NRG1-ERBB signaling. ITGAV:ITGB3 binds to FGF1 and this binding is essential for FGF1 signaling. ITGAV:ITGB3 binds to FGF2 and this binding is essential for FGF2 signaling (By similarity). ITGAV:ITGB3 binds to IGF1 and this binding is essential for IGF1 signaling (By similarity). ITGAV:ITGB3 binds to IGF2 and this binding is essential for IGF2 signaling (By similarity). ITGAV:ITGB3 binds to IL1B and this binding is essential for IL1B signaling (By similarity). ITGAV:ITGB3 binds to PLA2G2A via a site (site 2) which is distinct from the classical ligand-binding site (site 1) and this induces integrin conformational changes and enhanced ligand binding to site 1 (By similarity). ITGAV:ITGB3 acts as a receptor for fibrillin-1 (FBN1) and mediates R-G-D-dependent cell adhesion to FBN1 (By similarity).
Integrin alpha-V:beta-6 (ITGAV:ITGB6) is a receptor for fibronectin and cytotactin (PubMed:17545607, PubMed:17158881). It recognizes the sequence R-G-D in its ligands (PubMed:17545607, PubMed:17158881). Internalisation of integrin alpha-V/beta-6 via clathrin-mediated endocytosis promotes carcinoma cell invasion (PubMed:17545607, PubMed:17158881). ITGAV:ITGB6 acts as a receptor for fibrillin-1 (FBN1) and mediates R-G-D-dependent cell adhesion to FBN1 (PubMed:17158881). Integrin alpha-V:beta-6 (ITGAV:ITGB6) mediates R-G-D-dependent release of transforming growth factor beta-1 (TGF-beta-1) from regulatory Latency-associated peptide (LAP), thereby playing a key role in TGF-beta-1 activation (PubMed:15184403, PubMed:22278742, PubMed:28117447).
(Microbial infection) Integrin ITGAV:ITGB6 acts as a receptor for Coxsackievirus A9 and Coxsackievirus B1.
(Microbial infection) Integrin ITGAV:ITGB6 acts as a receptor for Herpes simplex virus-1/HHV-1 (PubMed:24367260).
Subunit
Heterodimer of an alpha and a beta subunit (By similarity). Beta-3 (ITGB3) associates with either alpha-IIB (ITGA2B) or alpha-V (ITGAV). Interacts with FLNB and COMP (By similarity). Interacts with PDIA6 following platelet stimulation (By similarity). Interacts with SYK; upon activation by ITGB3 promotes platelet adhesion (By similarity). Interacts with MYO10 (By similarity). Interacts with DAB2 (PubMed:12606711). Interacts with FERMT2 (PubMed:18483218). Integrin ITGAV:ITGB3 interacts with FBLN5 (via N-terminus) (PubMed:11805835). Interacts with EMP2; regulates the levels of the heterodimer ITGA5:ITGB3 integrin expression on the plasma membrane (By similarity). ITGAV:ITGB3 interacts with CCN3 (By similarity). ITGAV:ITGB3 interacts with AGRA2 (By similarity). ITGAV:ITGB3 is found in a ternary complex with CX3CR1 and CX3CL1. ITGAV:ITGB3 is found in a ternary complex with NRG1 and ERBB3. ITGAV:ITGB3 is found in a ternary complex with FGF1 and FGFR1. ITGAV:ITGB3 interacts with FGF2; it is likely that FGF2 can simultaneously bind ITGAV:ITGB3 and FGF receptors (By similarity). ITGAV:ITGB3 binds to IL1B (By similarity). ITGAV:ITGB3 is found in a ternary complex with IGF1 and IGF1R (By similarity). ITGAV:ITGB3 interacts with IGF2 (By similarity). ITGAV:ITGB3 interacts with FBN1 (By similarity). ITGAV:ITGB3 interacts with CD9, CD81 and CD151 (via second extracellular domain) (By similarity). Interacts (via the allosteric site (site 2)) with CXCL12 in a CXCR4-independent manner (By similarity). Interacts with MXRA8/DICAM; the interaction inhibits ITGAV:ITGB3 heterodimer formation (PubMed:22492581). ITGAV:ITGB3 interacts with PTN. Forms a complex with PTPRZ1 and PTN that stimulates endothelial cell migration through ITGB3 Tyr-772 phosphorylation (By similarity).
Heterodimer of an alpha and a beta subunit (PubMed:11807098, PubMed:17545607, PubMed:17158881). Interacts with FLNB (PubMed:11807098). Interacts with HAX1 (PubMed:17545607). ITGAV:ITGB6 interacts with FBN1 (PubMed:17158881). ITGAV:ITGB6 interacts with TGFB1 (PubMed:22278742, PubMed:28117447).
(Microbial infection) Integrin ITGAV:ITGB6 interacts with coxsackievirus A9, coxsackievirus B1 capsid proteins (PubMed:9426447, PubMed:15194773).
(Microbial infection) Integrin ITGAV:ITGB6 interacts with herpes simplex virus-1/HHV-1 gH:gL proteins.
Keywords
3D-structure
Cell adhesion
Cell junction
Cell membrane
Cell projection
Complete proteome
Disulfide bond
Glycoprotein
Integrin
Membrane
Phosphoprotein
Receptor
Reference proteome
Repeat
Signal
Transmembrane
Transmembrane helix
Alternative splicing
Amelogenesis imperfecta
Disease mutation
Host cell receptor for virus entry
Host-virus interaction
Polymorphism