Enables heparin binding activity. Predicted to be involved in several processes, including collagen biosynthetic process; collagen fibril organization; and wound healing, spreading of epidermal cells. Predicted to act upstream of or within several processes, including circulatory system development; skin development; and tendon development. Predicted to be located in basement membrane. Predicted to be part of collagen type V trimer. Predicted to be active in extracellular matrix and extracellular space. Human ortholog(s) of this gene implicated in Ehlers-Danlos syndrome and Ehlers-Danlos syndrome classic type 1. Orthologous to human COL5A1 (collagen type V alpha 1 chain). [provided by Alliance of Genome Resources, Apr 2022]