Cited by 671Aldose Reductase and TaurineSteroid Chemistry and BiochemistryHormonal Regulation and Hypertension

The DOI matches its Crossref record; 37 of the 38 references it cites were found in a registry or an index.

Human 3α-hydroxysteroid dehydrogenase isoforms (AKR1C1-AKR1C4) of the aldo-keto reductase superfamily: functional plasticity and tissue distribution reveals roles in the inactivation and formation of male and female sex hormones

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Abstract

The kinetic parameters, steroid substrate specificity and identities of reaction products were determined for four homogeneous recombinant human 3α-hydroxysteroid dehydrogenase (3α-HSD) isoforms of the aldo-keto reductase (AKR) superfamily. The enzymes correspond to type 1 3α-HSD (AKR1C4), type 2 3α(17β)-HSD (AKR1C3), type 3 3α-HSD (AKR1C2) and 20α(3α)-HSD (AKR1C1), and share at least 84% amino acid sequence identity. All enzymes acted as NAD(P)(H)-dependent 3-, 17- and 20-ketosteroid reductases and as 3α-, 17β- and 20α-hydroxysteroid oxidases. The functional plasticity of these isoforms highlights their ability to modulate the levels of active androgens, oestrogens and progestins. Salient features were that AKR1C4 was the most catalytically efficient, with kcat/Km values for substrates that exceeded those obtained with other isoforms by 10–30-fold. In the reduction direction, all isoforms inactivated 5α-dihydrotestosterone (17β-hydroxy-5α-androstan-3-one; 5α-DHT) to yield 5α-androstane-3α,17β-diol (3α-androstanediol). However, only AKR1C3 reduced ∆4-androstene-3,17-dione to produce significant amounts of testosterone. All isoforms reduced oestrone to 17β-oestradiol, and progesterone to 20α-hydroxy-pregn-4-ene-3,20-dione (20α-hydroxyprogesterone). In the oxidation direction, only AKR1C2 converted 3α-androstanediol to the active hormone 5α-DHT. AKR1C3 and AKR1C4 oxidized testosterone to ∆4-androstene-3,17-dione. All isoforms oxidized 17β-oestradiol to oestrone, and 20α-hydroxy…

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  1. 29 Leatherbarrow, R. J. (1987) ENZFITTER: A non-linear regression data analysis program for the IBM PC (and true compatibles), BioSoft, Cambridge, U.K.
  2. 33 Lin, H.-K., Jez, J. M., Overby, A. M., Burczynski, M. E., Peehl, D. M. and Penning, T. M. (2000) Type 3 3 a -hydroxysteroid dehydrogenase (3 a -HSD) accumulates 5 a -DHT and activates the androgen receptor in human prostate cancer PC3 cells. Proc. Am. Assoc. Cancer. Res. 41 , Abstract 1510

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Metadata

Authors
PENNING, T. M., BURCZYNSKI, M. E., JEZ, J. M., HUNG, C.-F., LIN, H.-K., MA, H., MOORE, M., PALACKAL, N., & RATNAM, K.
Affiliations
University of Pennsylvania (US)
Venue
Biochemical Journal
Published
2000-09-26
Volume
351
Issue
1
Pages
67-77
ISSN
  • 0264-6021 (ISSN-L)
  • 1470-8728
OpenAlex
W2045040068
Cited by
649
References
38
Citations by year
2026: 21 · 2025: 20 · 2024: 23 · 2023: 15 · 2022: 15 · 2021: 27 · 2020: 19 · 2019: 22 · 2018: 23 · 2017: 18 · 2016: 23 · 2015: 14 · 2014: 47 · 2013: 28 · 2012: 29
FWCI
6.29
Type
journal article
Language
en
Open access
Locations
  • Biochemical Journal (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of Diabetes and Digestive and Kidney Diseases (DK-47015, R01DK047015)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Aldose Reductase and Taurine
  • Physical Sciences › Chemistry › Organic Chemistry › Steroid Chemistry and Biochemistry
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Hormonal Regulation and Hypertension
Keywords
3α-hydroxysteroid dehydrogenase, aldo-keto reductase superfamily, steroid hormone metabolism, dihydrotestosterone, testosterone, estradiol, progesterone, 20alpha-dihydroprogesterone, 3α-androstanediol, enzyme kinetic parameters, substrate specificity
MeSH terms
Androgens, Binding Sites, Catalysis, Cloning, Molecular, Estrogens, Female, Humans, Isoenzymes, Ketones, Kinetics, Male, Organ Specificity, Progestins, Recombinant Proteins, RNA, Messenger, Steroids, Substrate Specificity, 3-Hydroxysteroid Dehydrogenases, Reverse Transcriptase Polymerase Chain Reaction, Gene Expression Profiling, 3-alpha-Hydroxysteroid Dehydrogenase (B-Specific)

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