3-oxo-5-alpha-steroid 4-dehydrogenase 1 (EC 1.3.1.22) (SR type 1) (Steroid 5-alpha-reductase 1) (S5AR 1)
1_MATAT 6_ GVAEE 11_ RLLAA 16_ LAYLQ 21_ CAVGC 26_ AVFAR 31_ NRQTN 36_ SVYGR 41_ HALPS 46_ HRLRV 51_ PARAA 56_ WVVQE 61_ LPSLA 66_ LPLYQ 71_ YASES 76_ APRLR 81_ SAPNC 86_ ILLAM 91_ FLVHY 96_ GHRCL 101_ IYPFL 106_ MRGGK 111_ PMPLL 116_ ACTMA 121_ IMFCT 126_ CNGYL 131_ QSRYL 136_ SHCAV 141_ YADDW 146_ VTDPR 151_ FLIGF 156_ GLWLT 161_ GMLIN 166_ IHSDH 171_ ILRNL 176_ RKPGD 181_ TGYKI 186_ PRGGL 191_ FEYVT 196_ AANYF 201_ GEIME 206_ WCGYA 211_ LASWS 216_ VQGAA 221_ FAFFT 226_ FCFLS 231_ GRAKE 236_ HHEWY 241_ LRKFE 246_ EYPKF 251_RKIII
1: Converts testosterone into 5-alpha-dihydrotestosterone and progesterone or corticosterone into their corresponding 5-alpha-3-oxosteroids. It plays a central role in sexual differentiation and androgen physiology