Enables interleukin-2 receptor binding activity. Acts upstream of or within several processes, including chondrocyte development; regulation of T cell migration; and regulation of bone mineralization. Located in extracellular space. Is expressed in several structures, including alimentary system; bone; cardiovascular system; skin; and testis. Human ortholog(s) of this gene implicated in lipoid proteinosis. Orthologous to human ECM1 (extracellular matrix protein 1). [provided by Alliance of Genome Resources, Apr 2022]