Predicted to be an extracellular matrix structural constituent. Predicted to be involved in extracellular matrix organization; female gonad development; and male gonad development. Predicted to be part of collagen type IX trimer. Predicted to be active in basement membrane and extracellular space. Human ortholog(s) of this gene implicated in multiple epiphyseal dysplasia 3 and osteochondrodysplasia. Orthologous to human COL9A3 (collagen type IX alpha 3 chain). [provided by Alliance of Genome Resources, Apr 2022]