NM_001328615.1
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UniProt Secondary Accession #
UniProt Related Accession #
Molecular Weight
42,252 Da
NCBI Official Full Name
3 beta-hydroxysteroid dehydrogenase/Delta 5-->4-isomerase type 1
NCBI Official Synonym Full Names
hydroxy-delta-5-steroid dehydrogenase, 3 beta- and steroid delta-isomerase 1
NCBI Official Synonym Symbols
I; HSD3B; HSDB3; HSDB3A; SDR11E1; 3BETAHSD [Similar Products]
NCBI Protein Information
3 beta-hydroxysteroid dehydrogenase/Delta 5-->4-isomerase type 1
UniProt Protein Name
3 beta-hydroxysteroid dehydrogenase/Delta 5-->4-isomerase type 1
UniProt Synonym Protein Names
3 beta-hydroxysteroid dehydrogenase/Delta 5-->4-isomerase type I; 3-beta-HSD I; Trophoblast antigen FDO161GIncluding the following 2 domains:3-beta-hydroxy-Delta(5)-steroid dehydrogenase (EC:1.1.1.145)Alternative name(s):3-beta-hydroxy-5-ene steroid dehydrogenase; Progesterone reductase
UniProt Synonym Gene Names
UniProt Entry Name
3BHS1_HUMAN
NCBI Summary for HSD3B1
The protein encoded by this gene is an enzyme that catalyzes the oxidative conversion of delta-5-3-beta-hydroxysteroid precursors into delta-4-ketosteroids, which leads to the production of all classes of steroid hormones. The encoded protein also catalyzes the interconversion of 3-beta-hydroxy- and 3-keto-5-alpha-androstane steroids. [provided by RefSeq, Jun 2016]
UniProt Comments for HSD3B1
HSD3B1: 3-beta-HSD is a bifunctional enzyme, that catalyzes the oxidative conversion of Delta(5)-ene-3-beta-hydroxy steroid, and the oxidative conversion of ketosteroids. The 3-beta-HSD enzymatic system plays a crucial role in the biosynthesis of all classes of hormonal steroids. Efficiently catalyzes the transformation of pregnenolone to progesterone, 17-alpha-hydroxypregnenolone to 17- alpha-hydroxyprogesterone, DHEA to 4-androstenedione, dihydrotestosterone to 5-alpha-androstane-3 beta,17 beta-diol, dehydroepiandrosterone to androstenedione and 5-alpha-androstan-3 beta,17 beta-diol to 5-alpha-dihydrotestosterone. Belongs to the 3-beta-HSD family.
Protein type: EC 1.1.1.145; EC 5.3.3.1; Isomerase; Lipid Metabolism - C21-steroid hormone; Lipid Metabolism - androgen and estrogen; Membrane protein, integral; Mitochondrial; Oxidoreductase
Chromosomal Location of Human Ortholog: 1p13.1
Cellular Component: endoplasmic reticulum membrane; mitochondrial inner membrane; mitochondrial intermembrane space; smooth endoplasmic reticulum membrane
Molecular Function: 3-beta-hydroxy-delta5-steroid dehydrogenase activity; steroid delta-isomerase activity
Biological Process: androgen biosynthetic process; estrogen biosynthetic process; glucocorticoid biosynthetic process; mineralocorticoid biosynthetic process; steroid biosynthetic process
Research Articles on HSD3B1
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