Cited by 10Steroid Chemistry and BiochemistryAdrenal Hormones and DisordersHormonal Regulation and Hypertension

Role of microsomal steroid hydroxylases in Δ7-steroid biosynthesis

Sushko, T. A., Gilep, A. A., Yantsevich, A. V., Usanov, S. A.·2013·Biochemistry (Moscow)

Abstract

CYP17 (steroid 17α-hydroxylase/17,20-lyase) is a key enzyme in steroid hormone biosynthesis. It catalyzes two independent reactions at the same active center and has a unique ability to differentiate Δ(4)-steroids and Δ(5)-steroids in the 17,20-lyase reaction. The present work presents a complex experimental analysis of the role of CYP17 in the metabolism of 7-dehydrosteroids. The data indicate the existence of a possible alternative pathway of steroid hormone biosynthesis using 7-dehydrosteroids. The major reaction products of CYP17 catalyzed hydroxylation of 7-dehydropregnenolone have been identified. Catalytic activity of CYP17 from different species with 7-dehydropregnenolone has been estimated. It is shown that CYP21 cannot use Δ(5)-Δ(7) steroids as a substrate.

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Crossref · 10.1134/s0006297913030103

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Authors
Sushko, T. A., Gilep, A. A., Yantsevich, A. V., & Usanov, S. A.
Affiliations
National Academy of Sciences of Belarus (BY)
Corresponding author
Sushko, T. A.
Venue
Biochemistry (Moscow)
Published
2013-03
Volume
78
Issue
3
Pages
282-289
ISSN
  • 0006-2979 (ISSN-L)
  • 1608-3040
OpenAlex
W2034077203
Cited by
10
References
44
Citations by year
2024: 1 · 2021: 2 · 2020: 2 · 2018: 2 · 2014: 3
FWCI
0.45
Type
journal article
Language
en
Open access
closed
Locations
  • Biochemistry (Moscow) (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Steroid Chemistry and Biochemistry
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Adrenal Hormones and Disorders
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Hormonal Regulation and Hypertension
Keywords
CYP17, steroidogenesis
MeSH terms
Humans, Kinetics, Microsomes, Steroid 17-alpha-Hydroxylase, Steroid 21-Hydroxylase, Steroids, Substrate Specificity, Biocatalysis

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