Predicted to enable dolichyl-phosphate-mannose-protein mannosyltransferase activity. Predicted to be involved in calcium ion homeostasis and protein O-linked mannosylation. Predicted to be located in endoplasmic reticulum. Predicted to be active in endoplasmic reticulum membrane. Orthologous to human TMTC2 (transmembrane O-mannosyltransferase targeting cadherins 2); INTERACTS WITH 2-methoxyethanol; 6-propyl-2-thiouracil; alpha-Zearalanol.