Predicted to enable GDP-Man:Man3GlcNAc2-PP-Dol alpha-1,2-mannosyltransferase activity. Predicted to be involved in oligosaccharide-lipid intermediate biosynthetic process and protein N-linked glycosylation. Predicted to be located in endoplasmic reticulum. Predicted to be integral component of membrane. Predicted to be active in endoplasmic reticulum membrane. Is expressed in several structures, including brain; genitourinary system; gut; hemolymphoid system gland; and respiratory system. Human ortholog(s) of this gene implicated in congenital disorder of glycosylation Ip. Orthologous to human ALG11 (ALG11 alpha-1,2-mannosyltransferase). [provided by Alliance of Genome Resources, Apr 2022]