FUNCTION Collagen VI acts as a cell-binding protein.SUBUNIT Trimers composed of three different chains: alpha-1(VI), alpha-2(VI), and alpha-3(VI) or alpha-5(VI) or alpha-6(VI). Interacts with CSPG4.INTERACTION Recruited on membranes by CSPG4.ALTERNATIVE PRODUCTS Prolines at the third position of the tripeptide repeating unit (G-X-Y) are hydroxylated in some or all of the chains.DISEASE The disease is caused by variants affecting the gene represented in this entry.DISEASE The disease is caused by variants affecting the gene represented in this entry.DISEASE The disease is caused by variants affecting the gene represented in this entry.SIMILARITY Belongs to the type VI collagen family.