Aliases for ITGB3 Gene
External Ids for ITGB3 Gene
Previous HGNC Symbols for ITGB3 Gene
Previous GeneCards Identifiers for ITGB3 Gene
The ITGB3 protein product is the integrin beta chain beta 3. Integrins are integral cell-surface proteins composed of an alpha chain and a beta chain. A given chain may combine with multiple partners resulting in different integrins. Integrin beta 3 is found along with the alpha IIb chain in platelets. Integrins are known to participate in cell adhesion as well as cell-surface mediated signalling. [provided by RefSeq, Jul 2008]
GeneCards Summary for ITGB3 Gene
ITGB3 (Integrin Subunit Beta 3) is a Protein Coding gene. Diseases associated with ITGB3 include Bleeding Disorder, Platelet-Type, 16, Autosomal Dominant and Glanzmann Thrombasthenia. Among its related pathways are Integrin alphaIIb beta3 signaling and Reelin Pathway (Cajal-Retzius cells). GO annotations related to this gene include identical protein binding and protease binding. An important paralog of this gene is ENSG00000259753.
UniProtKB/Swiss-Prot for ITGB3 Gene
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 surface. Fibrinogen binding enhances SELP expression in activated platelets (By similarity). ITGAV:ITGB3 binds to fractalkine (CX3CL1) and acts as its coreceptor in CX3CR1-dependent fractalkine signaling (PubMed:23125415, PubMed:24789099). ITGAV:ITGB3 binds to NRG1 (via EGF domain) and this binding is essential for NRG1-ERBB signaling (PubMed:20682778). ITGAV:ITGB3 binds to FGF1 and this binding is essential for FGF1 signaling (PubMed:18441324). ITGAV:ITGB3 binds to IGF1 and this binding is essential for IGF1 signaling (PubMed:19578119). 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 (PubMed:18635536, PubMed:25398877).
(Microbial infection) Integrin ITGAV:ITGB3 acts as a receptor for herpes virus 8/HHV-8 (PubMed:18045938). Integrin ITGAV:ITGB3 acts as a receptor for coxsackievirus A9 (PubMed:7519807). Acts as a receptor for Hantaan virus (PubMed:9618541). Integrin ITGAV:ITGB3 acts as a receptor for cytomegalovirus/HHV-5 (PubMed:15834425). Integrin ITGA5:ITGB3 acts as a receptor for human metapneumovirus (PubMed:24478423). Integrin ITGAV:ITGB3 acts aP05556s a receptor for human parechovirus 1 (PubMed:11160695). Integrin ITGAV:ITGB3 acts as a receptor for west nile virus (PubMed:23658209). In case of HIV-1 infection, the interaction with extracellular viral Tat protein seems to enhance angiogenesis in Kaposis sarcoma lesions (PubMed:10397733).
Integrins are ubiquitously expressed adhesion molecules. They are cell-surface receptors that exist as heterodimers of alpha and beta subunits. Under physiological conditions, integrins are highly glycosylated and contain a Ca2+ or Mg2+ ion, which is essential for ligand binding.