Predicted to enable 3-oxo-5-alpha-steroid 4-dehydrogenase activity and oxidoreductase activity, acting on the CH-CH group of donors, NAD or NADP as acceptor. Predicted to be involved in dolichol biosynthetic process; dolichol-linked oligosaccharide biosynthetic process; and polyprenol catabolic process. Predicted to be located in endoplasmic reticulum membrane. Predicted to be integral component of membrane. Predicted to be active in endoplasmic reticulum. Human ortholog(s) of this gene implicated in Kahrizi syndrome and congenital disorder of glycosylation Iq. Orthologous to human SRD5A3 (steroid 5 alpha-reductase 3). [provided by Alliance of Genome Resources, Apr 2022]