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3alpha(17beta)-hydroxysteroid dehydrogenase (NAD+)

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Enzyme
3-alpha(17-beta)-hydroxysteroid dehydrogenase (NAD)
Identifiers
EC no.1.1.1.239
CAS no.126469-82-7
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In enzymology, a 3alpha(17beta)-hydroxysteroid dehydrogenase (NAD) (EC 1.1.1.239) is an enzyme that catalyzes the chemical reaction:

testosterone + NAD {\displaystyle \rightleftharpoons } androst-4-ene-3,17-dione + NADH + H

Thus, the two substrates of this enzyme are testosterone and NAD, whereas its 3 products are androst-4-ene-3,17-dione, NADH, 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. The systematic name of this enzyme class is 3alpha(or 17beta)-hydroxysteroid:NAD oxidoreductase. Other names in common use include 3alpha,17beta-hydroxy steroid dehydrogenase, 3alpha(17beta)-HSD, and 3alpha(17beta)-hydroxysteroid dehydrogenase (NAD). This enzyme participates in androgen and estrogen metabolism.

See also

References

Oxidoreductases: alcohol oxidoreductases (EC 1.1)
1.1.1: NAD/NADP acceptor
1.1.2: cytochrome acceptor
1.1.3: oxygen acceptor
1.1.4: disulfide as acceptor
1.1.5: quinone/similar acceptor
1.1.99: other acceptors
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