The function of ITGB8 (integrin subunit beta 8, Ensembl gene identifier ENSG00000105855) is as follows. Integrin alpha-V:beta-8 (ITGAV:ITGB8) is a receptor for fibronectin (PubMed:1918072). It recognizes the sequence R-G-D in its ligands (PubMed:1918072). 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 on the surface of activated regulatory T-cells (Tregs) (Probable). Required during vasculogenesis (By similarity). {ECO:0000250|UniProtKB:Q0VBD0, ECO:0000269|PubMed:1918072, ECO:0000305|PubMed:22278742}.