Predicted to enable mannosyl-oligosaccharide 1,2-alpha-mannosidase activity. Predicted to be involved in endoplasmic reticulum unfolded protein response; mannoprotein catabolic process; and ubiquitin-dependent glycoprotein ERAD pathway. Predicted to act upstream of or within carbohydrate metabolic process; endoplasmic reticulum mannose trimming; and mannose trimming involved in glycoprotein ERAD pathway. Predicted to be located in membrane. Predicted to be active in endoplasmic reticulum.