Predicted to enable Notch binding activity and polypeptide N-acetylgalactosaminyltransferase activity. Predicted to be involved in protein O-linked glycosylation via threonine and regulation of Notch signaling pathway. Predicted to act upstream of or within Notch signaling pathway. Predicted to be located in membrane. Predicted to be integral component of membrane. Predicted to be active in Golgi apparatus. Orthologous to human GALNT11 (polypeptide N-acetylgalactosaminyltransferase 11). [provided by Alliance of Genome Resources, Apr 2022]