Dolichol-phosphate mannosyltransferase subunit 1 (DPM1)

Transfers mannose from GDP-mannose to dolichol monophosphate to form dolichol phosphate mannose (Dol-P-Man) which is the mannosyl donor in pathways leading to N-glycosylation, glycosyl phosphatidylinositol membrane anchoring, and O- mannosylation of proteins; catalytic subunit of the dolichol- phosphate mannose (DPM) synthase complex. .