Predicted to enable polypeptide N-acetylgalactosaminyltransferase activity. Predicted to be involved in protein O-linked glycosylation. Predicted to be located in membrane. Predicted to be integral component of membrane. Predicted to be active in Golgi apparatus. Is expressed in several structures, including alimentary system; central nervous system; cranium; respiratory system; and sensory organ. Orthologous to human GALNT18 (polypeptide N-acetylgalactosaminyltransferase 18). [provided by Alliance of Genome Resources, Apr 2022]