Collagen VI acts as a cell-binding protein. Trimers composed of three different chains: alpha-1(VI), alpha-2(VI), and alpha-3(VI) or alpha-4(VI) or alpha-5(VI) or alpha-6(VI). Interacts with CSPG4 (By similarity). Recruited on membranes by CSPG4. Highly expressed in adipose tissue, lung, adrenal glands and ovary. Lower levels in testis, tongue, skin, kidney, heart, intestine and spleen. No expression in skeletal muscle or liver. Prolines at the third position of the tripeptide repeating unit (G-X-Y) are hydroxylated in some or all of the chains. Belongs to the type VI collagen family. Truncated N-terminus.