Predicted to enable metal ion binding activity. Involved in spermatid development. Predicted to be located in endosome and membrane. Predicted to be integral component of membrane. Predicted to be active in Golgi apparatus. Orthologous to human GALNTL5 (polypeptide N-acetylgalactosaminyltransferase like 5). [provided by Alliance of Genome Resources, Apr 2022]