Enables 3-oxo-5-alpha-steroid 4-dehydrogenase activity and amide binding activity. Involved in several processes, including androgen biosynthetic process; animal organ development; and phthalate metabolic process. Located in cell body fiber; cytoplasm; and neuronal cell body. Biomarker of diabetes mellitus and hyperprolactinemia. Human ortholog(s) of this gene implicated in hypospadias and prostate cancer. Orthologous to human SRD5A2 (steroid 5 alpha-reductase 2). [provided by Alliance of Genome Resources, Apr 2022]