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Substance Name: Dehydrogenase, 3alpha-hydroxy steroid
RN: 9028-56-2


  • A 3-hydroxysteroid dehydrogenase which catalyzes the reversible reduction of the active androgen, DIHYDROTESTOSTERONE to 5 ALPHA-ANDROSTANE-3 ALPHA,17 BETA-DIOL. It also has activity towards other 3-alpha-hydroxysteroids and on 9-, 11- and 15- hydroxyprostaglandins. The enzyme is B-specific in reference to the orientation of reduced NAD or NADPH.
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Names and Synonyms

MeSH Heading

  • 3-alpha-Hydroxysteroid Dehydrogenase (B-Specific)


  • EINECS 232-839-5

Systematic Name

  • Dehydrogenase, 3alpha-hydroxy steroid

Registry Numbers

CAS Registry Number

  • 9028-56-2

System Generated Number

  • 0009028562