Integrin beta-3 - O54890 (ITB3_MOUSE)


Protein Feature View of PDB entries mapped to a UniProtKB sequence  

  • Number of PDB entries for O54890: 1
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. UniProt
Pathway Maps
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Subunit Structure
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 NOV (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. UniProt
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