Predicted to enable glycosyltransferase activity. Predicted to be involved in heparan sulfate proteoglycan biosynthetic process and positive regulation of cell growth. Predicted to be located in endoplasmic reticulum and membrane. Predicted to be active in Golgi apparatus. Is expressed in several structures, including alimentary system; central nervous system; heart; metanephros; and sensory organ. Orthologous to human EXTL3 (exostosin like glycosyltransferase 3). [provided by Alliance of Genome Resources, Apr 2022]