Integrin alpha-V/beta-3 is a receptor for cytotactin, fibronectin, laminin, matrix metalloproteinase-2, osteopontin, osteomodulin, prothrombin, thrombospondin, vitronectin and von Willebrand factor. Integrin alpha-IIb/beta-3 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 surface. In case of HIV-1 infection, the interaction with extracellular viral Tat protein seems to enhance angiogenesis in Kaposi's sarcoma lesions.1) Sujoy Bhattacharya, et al. (2006) Biochem J. August 1; 397 (Pt 3): 437–447Courter DL, et al. (2005) J Biol Chem Apr 01; 280 (13): 12145-12151Chandhoke SK, et al. (2004) J Cell Sci Mar 15; 117 (Pt 8): 1431-1441
Immunogen
Integrin beta3 (Phospho-Tyr785) antibody was raised against a peptide sequence around phosphorylation site of tyrosine 785 (I-T-Y (p) -R-G) derived from Human Integrin β3.