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. Involved in dolichol metabolic process; dolichol-linked oligosaccharide biosynthetic process; and polyprenol catabolic process. Predicted to be located in membrane. Predicted to be integral component of membrane. Predicted to be active in endoplasmic reticulum. Is expressed in several structures, including alimentary system; brain; early embryo; genitourinary system; and hemolymphoid system gland. 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]