Predicted to enable UDP-N-acetylglucosamine-lysosomal-enzyme N-acetylglucosaminephosphotransferase activity. Acts upstream of or within carbohydrate phosphorylation and secretion of lysosomal enzymes. Predicted to be located in Golgi membrane. Predicted to be active in Golgi apparatus. Used to study mucolipidosis II alpha/beta. Human ortholog(s) of this gene implicated in mucolipidosis II alpha/beta and mucolipidosis III alpha/beta. Orthologous to human GNPTAB (N-acetylglucosamine-1-phosphate transferase subunits alpha and beta). [provided by Alliance of Genome Resources, Apr 2022]