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・ 3AC
・ 3AD
・ 3AK
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・ 3alpha(17beta)-hydroxysteroid dehydrogenase (NAD+)
・ 3alpha(or 20beta)-hydroxysteroid dehydrogenase
・ 3alpha(S)-strictosidine beta-glucosidase
・ 3alpha,7alpha,12alpha-trihydroxy-5beta-cholest-24-enoyl-CoA hydratase
・ 3alpha,7alpha,12alpha-trihydroxy-5beta-cholestanoyl-CoA 24-hydroxylase
・ 3alpha,7alpha,12alpha-trihydroxycholestan-26-al 26-oxidoreductase
・ 3alpha-hydroxy-5beta-androstane-17-one 3alpha-dehydrogenase
・ 3alpha-hydroxycholanate dehydrogenase
・ 3alpha-hydroxyglycyrrhetinate dehydrogenase
・ 3alpha-hydroxysteroid dehydrogenase (A-specific)
3alpha-hydroxysteroid dehydrogenase (B-specific)
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・ 3beta(or 20alpha)-hydroxysteroid dehydrogenase


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3alpha-hydroxysteroid dehydrogenase (B-specific) : ウィキペディア英語版
3alpha-hydroxysteroid dehydrogenase (B-specific)

In enzymology, a 3alpha-hydroxysteroid dehydrogenase (B-specific) () is an enzyme that catalyzes the chemical reaction
:androsterone + NAD(P)+ \rightleftharpoons 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 , , , , , , and .

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