Predicted to enable mannosyltransferase activity. Predicted to be involved in positive regulation of proteasomal protein catabolic process; protein O-linked mannosylation; and response to endoplasmic reticulum stress. Predicted to act upstream of or within several processes, including lung development; muscle cell development; and post-embryonic development. Predicted to be located in endoplasmic reticulum. Human ortholog(s) of this gene implicated in lissencephaly 8. Orthologous to human TMTC3 (transmembrane O-mannosyltransferase targeting cadherins 3). [provided by Alliance of Genome Resources, Apr 2022]