The alpha-V (ITGAV) integrins are receptors for vitronectin, cytotactin, fibronectin, fibrinogen, laminin, matrix metalloproteinase-2, osteopontin, osteomodulin, prothrombin, thrombospondin and vWF. They recognize the sequence R-G-D in a wide array of ligands. ITGAV:ITGB3 binds to fractalkine (CX3CL1) and may act as its coreceptor in CX3CR1-dependent fractalkine signaling (PubMed:23125415). 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 FGF2 and this binding is essential for FGF2 signaling (PubMed:28302677). ITGAV:ITGB3 binds to IGF1 and this binding is essential for IGF1 signaling (PubMed:19578119). ITGAV:ITGB3 binds to IGF2 and this binding is essential for IGF2 signaling (PubMed:28873464). ITGAV:ITGB3 binds to IL1B and this binding is essential for IL1B signaling (PubMed:29030430). 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). ITGAV:ITGB3 and ITGAV:ITGB6 act as receptors for fibrillin-1 (FBN1) and mediate R-G-D-dependent cell adhesion to FBN1 (PubMed:12807887, PubMed:17158881). Integrin alpha-V/beta-6 or alpha-V/beta-8 (ITGAV:ITGB6 or ITGAV:ITGB8) 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). ITGAV:ITGB3 acts as a receptor for CD40LG (PubMed:31331973). (Microbial infection) Integrin ITGAV:ITGB5 acts as a receptor for Adenovirus type C. (Microbial infection) Integrin ITGAV:ITGB5 and ITGAV:ITGB3 act as receptors for Coxsackievirus A9 and B1. (Microbial infection) Integrin ITGAV:ITGB3 acts as a receptor for Herpes virus 8/HHV-8. (Microbial infection) Integrin ITGAV:ITGB6 acts as a receptor for herpes simplex 1/HHV-1. (Microbial infection) Integrin ITGAV:ITGB3 acts as a receptor for Human parechovirus 1. (Microbial infection) Integrin ITGAV:ITGB3 acts as a receptor for West nile virus. (Microbial infection) In case of HIV-1 infection, the interaction with extracellular viral Tat protein seems to enhance angiogenesis in Kaposi's sarcoma lesions. Heterodimer of an alpha and a beta subunit. The alpha subunit is composed of a heavy and a light chain linked by a disulfide bond. Alpha-V (ITGAV) associates with either beta-1 (ITGB1), beta-3 (ITGB3), beta-5 (ITGB5), beta-6 (ITGB6) or beta-8 (ITGB8). Interacts with CIB1 (PubMed:24011356). Interacts with RAB25 (PubMed:17925226). Integrins ITGAV:ITGB3 and ITGAV:ITGB5 interact with FBLN5 (via N-terminus) (By similarity). ITGAV:ITGB3 and ITGAV:ITGB5 interact with CCN3 (PubMed:12695522). ITGAV:ITGB3 interacts with ADGRA2 (PubMed:16982628). ITGAV:ITGB3 interacts with FGF2; it is likely that FGF2 can simultaneously bind ITGAV:ITGB3 and FGF receptors (PubMed:28302677). ITGAV:ITGB3 interacts with IL1B (PubMed:29030430). ITGAV:ITGB3 is found in a ternary complex with CX3CR1 and CX3CL1 (PubMed:23125415). ITGAV:ITGB3 is found in a ternary complex with NRG1 and ERBB3 (PubMed:20682778). ITGAV:ITGB3 is found in a ternary complex with FGF1 and FGFR1 (PubMed:18441324). ITGAV:ITGB3 is found in a ternary complex with IGF1 and IGF1R (PubMed:19578119). ITGAV:ITGB3 interacts with IGF2 (PubMed:28873464). ITGAV:ITGB3 and ITGAV:ITGB6 interact with FBN1 (PubMed:12807887, PubMed:17158881). ITGAV:ITGB3 interacts with CD9, CD81 and CD151 (via second extracellular domain) (PubMed:27993971). ITGAV:ITGB6 interacts with TGFB1 (PubMed:22278742, PubMed:28117447). ITGAV:ITGB3 interacts with PTN (PubMed:19141530). Forms a complex with PTPRZ1 and PTN that stimulates endothelial cell migration through ITGB3 'Tyr-773' phosphorylation (PubMed:19141530). (Microbial infection) Integrin ITGAV:ITGB3 interacts with herpes virus 8/HHV-8 envelope glycoprotein B. (Microbial infection) Integrin ITGAV:ITGB3 and ITGAV:ITGB6 bind to coxsackievirus A9 and coxsackievirus B1 capsid proteins (PubMed:9426447, PubMed:15194773, PubMed:7519807). (Microbial infection) Integrin ITGAV:ITGB6 interacts with herpes simplex 1/HHV-1 envelope glycoprotein H. (Microbial infection) Integrin ITGAV:ITGB3 interacts with Herpes simplex 2/HHV-2 envelope glycoprotein H. (Microbial infection) Integrin ITGAV:ITGB5 interacts with adenovirus type C penton protein. (Microbial infection) Integrin ITGAV:ITGB3 interacts with Human parechovirus 1 capsid proteins. (Microbial infection) Integrin ITGAV:ITGB3 interacts with West nile virus envelope protein E. (Microbial infection) Interacts with HIV-1 Tat. Belongs to the integrin alpha chain family. Extended N-terminus.