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17 beta-hydroxysteroid dehydrogenase-1; estradiol 17 beta-dehydrogenase 1; 20 alpha-hydroxysteroid dehydrogenase (HSD17B1)

Function: - converts androstenedione to testosterone & estrone to estradiol - may be two different enzymes under different control, one localized to testes - only reversible enzyme system involved in steroid biosynthesis - favors the reduction of estrogens & androgens - 20-alpha-HSD activity - estrogens biosynthesis - favors NAD estradiol-17-beta + NAD+/NADP+ estrone + NADH/NADPH Structure: - homodimer - belongs to the short-chain dehydrogenases/reductases (SDR) family Compartment: cytoplasm

General

17 beta-hydroxysteroid dehydrogenase (estradiol 17 beta-dehydrogenase, HSD17B1) 20-hydroxysteroid dehydrogenase or cortisone reductase oligomerizing protein

Properties

SIZE: entity length = 328 aa MW = 35 kD COMPARTMENT: cytoplasm MOTIF: cofactor-binding site [10-38] COFACTOR-BOUND: NADP cofactor-binding site [66-66] COFACTOR-BOUND: NADP binding site SITE: 143-143 FOR-BINDING-OF: androstenedione estrone tyrosine residue {Y156} cofactor-binding site [160-160] COFACTOR-BOUND: NADP

Database Correlations

OMIM 109684 UniProt P14061 ENZYME 1.1.1.62

References

  1. UniProt :accession P14061
  2. SHMPD, The Singapore human mutation & polymorphism database http://shmpd.bii.a-star.edu.sg/gene.php?genestart=A&genename=HSD17B1