Predicted to enable glycosyltransferase activity. Predicted to be involved in GPI anchor biosynthetic process. Predicted to be located in Golgi apparatus and membrane. Predicted to be integral component of membrane. Predicted to be active in Golgi membrane. Is expressed in ganglia; nucleus pulposus; and thymus primordium. Orthologous to human PGAP4 (post-GPI attachment to proteins GalNAc transferase 4). [provided by Alliance of Genome Resources, Apr 2022]