Predicted to enable polypeptide N-acetylgalactosaminyltransferase activity. Predicted to be involved in protein O-linked glycosylation via serine and protein O-linked glycosylation via threonine. Predicted to be located in Golgi membrane. Predicted to be integral component of membrane. Predicted to be active in Golgi apparatus. Orthologous to human GALNT16 (polypeptide N-acetylgalactosaminyltransferase 16). [provided by Alliance of Genome Resources, Apr 2022]