Predicted to enable protein xylosyltransferase activity. Predicted to be involved in chondroitin sulfate proteoglycan biosynthetic process and heparan sulfate proteoglycan biosynthetic process. Predicted to act upstream of or within chondroitin sulfate biosynthetic process. Predicted to be located in Golgi membrane. Human ortholog(s) of this gene implicated in Desbuquois dysplasia; pseudoxanthoma elasticum; and type 1 diabetes mellitus. Orthologous to human XYLT1 (xylosyltransferase 1).