Predicted to enable mannosyltransferase activity. Predicted to be involved in protein glycosylation. Predicted to be active in endoplasmic reticulum. Human ortholog(s) of this gene implicated in congenital disorder of glycosylation Ik. Orthologous to human ALG1 (ALG1 chitobiosyldiphosphodolichol beta-mannosyltransferase). [provided by Alliance of Genome Resources, Apr 2022]