DHRSX

Oxidoreductase that plays a key role in early steps of protein N-linked glycosylation by mediating two non-consecutive steps in dolichol biosynthesis. Acts both as a NAD(+)-dependent dehydrogenase and as a NADPH-dependent reductase during the conversion of polyprenol into dolichol. First catalyzes the NAD(+)-dependent dehydrogenation of polyprenol into polyprenal; polyprenal is then reduced into dolichal by SRD5A3. It then catalyzes the NADPH-dependent reduction of dolichal into dolichol. May also acts as a positive regulator of starvation-induced autophagy..

Function from UniProtKB (Q8N5I4), read 2026-09-23. CC BY 4.0.