Predicted to enable mannosyltransferase activity. Predicted to be involved in calcium ion homeostasis and protein O-linked mannosylation. Predicted to be located in endoplasmic reticulum membrane. Is expressed in several structures, including cranial ganglion; gut; limb segment; musculoskeletal system; and sensory organ. Orthologous to human TMTC2 (transmembrane O-mannosyltransferase targeting cadherins 2). [provided by Alliance of Genome Resources, Apr 2022]