Predicted to be an extracellular matrix structural constituent conferring tensile strength. Located in extracellular matrix; extracellular space; and sarcolemma. Part of collagen trimer. Is expressed in several structures, including brain meninges; cardiovascular system; embryo mesenchyme; genitourinary system; and musculoskeletal system. Used to study Ullrich congenital muscular dystrophy and congenital muscular dystrophy. Human ortholog(s) of this gene implicated in Ullrich congenital muscular dystrophy; dystonia 27; and muscular dystrophy. Orthologous to human COL6A3 (collagen type VI alpha 3 chain). [provided by Alliance of Genome Resources, Apr 2022]