3alpha-hydroxysteroid dehydrogenase (B-specific)

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3-alpha-hydroxysteroid dehydrogenase (B-specific)
Identifiers
EC no. 1.1.1.50
CAS no. 9028-56-2
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BRENDA BRENDA entry
ExPASy NiceZyme view
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MetaCyc metabolic pathway
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In enzymology, a 3alpha-hydroxysteroid dehydrogenase (B-specific) (EC 1.1.1.50) is an enzyme that catalyzes the chemical reaction

androsterone + NAD(P)+ 5alpha-androstane-3,17-dione + NAD(P)H + H+

The 3 substrates of this enzyme are androsterone, NAD+, and NADP+, whereas its 4 products are 5alpha-androstane-3,17-dione, NADH, NADPH, and H+.

This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-OH group of donor with NAD+ or NADP+ as acceptor, more specifically it is part of the group of hydroxysteroid dehydrogenases. The systematic name of this enzyme class is 3alpha-hydroxysteroid:NAD(P)+ oxidoreductase (B-specific). Other names in common use include hydroxyprostaglandin dehydrogenase, 3alpha-hydroxysteroid oxidoreductase, and sterognost 3alpha. This enzyme participates in 3 metabolic pathways: bile acid biosynthesis, c21-steroid hormone metabolism, and androgen and estrogen metabolism.

Structural studies

As of late 2007, 7 structures have been solved for this class of enzymes, with PDB accession codes 1AFS, 1FJH, 1FK8, 1LWI, 1RAL, 2DKN, and 2FVL.

Related Research Articles

3β-Hydroxysteroid dehydrogenase/Δ5-4 isomerase (3β-HSD) is an enzyme that catalyzes the biosynthesis of the steroid progesterone from pregnenolone, 17α-hydroxyprogesterone from 17α-hydroxypregnenolone, and androstenedione from dehydroepiandrosterone (DHEA) in the adrenal gland. It is the only enzyme in the adrenal pathway of corticosteroid synthesis that is not a member of the cytochrome P450 family. It is also present in other steroid-producing tissues, including the ovary, testis and placenta. In humans, there are two 3β-HSD isozymes encoded by the HSD3B1 and HSD3B2 genes.

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<span class="mw-page-title-main">UDP-N-acetylmuramate dehydrogenase</span> Class of enzymes

In enzymology, an UDP-N-acetylmuramate dehydrogenase (EC 1.3.1.98) is an enzyme that catalyzes the chemical reaction

In enzymology, a 20-α-hydroxysteroid dehydrogenase (EC 1.1.1.149) is an enzyme that catalyzes the chemical reaction

In enzymology, a glycerol-3-phosphate dehydrogenase [NAD(P)+] (EC 1.1.1.94) is an enzyme that catalyzes the chemical reaction

In enzymology, a 3alpha(17beta)-hydroxysteroid dehydrogenase (NAD+) (EC 1.1.1.239) is an enzyme that catalyzes the chemical reaction:

In enzymology, a 3alpha-hydroxy-5beta-androstane-17-one 3alpha-dehydrogenase (EC 1.1.1.152) is an enzyme that catalyzes the chemical reaction

In enzymology, a 3alpha-hydroxysteroid dehydrogenase (A-specific) (EC 1.1.1.213) is an enzyme that catalyzes the chemical reaction

<span class="mw-page-title-main">3alpha(or 20beta)-hydroxysteroid dehydrogenase</span> Class of enzymes

In enzymology, a 3alpha(or 20beta)-hydroxysteroid dehydrogenase (EC 1.1.1.53) is an enzyme that catalyzes the chemical reaction

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<span class="mw-page-title-main">L-aminoadipate-semialdehyde dehydrogenase</span>

In enzymology, a L-aminoadipate-semialdehyde dehydrogenase (EC 1.2.1.31) is an enzyme that catalyzes the chemical reaction

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<span class="mw-page-title-main">HSD17B6</span>

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3(or 17)alpha-hydroxysteroid dehydrogenase (EC 1.1.1.209, 3(17)alpha-hydroxysteroid dehydrogenase) is an enzyme with systematic name 3(or 17)alpha-hydroxysteroid:NAD(P)+ oxidoreductase. This enzyme catalyses the chemical reaction

<span class="mw-page-title-main">5α-Pregnan-17α-ol-3,20-dione</span> Chemical compound

5α-Pregnan-17α-ol-3,20-dione, also known as 17α-hydroxy-dihydroprogesterone (17-OH-DHP) is an endogenous steroid, a metabolite of 17α-hydroxyprogesterone.

References