Hydroxyacid-oxoacid transhydrogenase

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In enzymology, a hydroxyacid-oxoacid transhydrogenase (EC is an enzyme that catalyzes the chemical reaction

(S)-3-hydroxybutanoate + 2-oxoglutarate acetoacetate + (R)-2-hydroxyglutarate

Thus, the two substrates of this enzyme are (S)-3-hydroxybutanoate and 2-oxoglutarate, whereas its two products are acetoacetate and (R)-2-hydroxyglutarate.

This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-OH group of donor with other acceptors. The systematic name of this enzyme class is (S)-3-hydroxybutanoate:2-oxoglutarate oxidoreductase. This enzyme is also called transhydrogenase, hydroxy acid-oxo acid.


  • IUBMB entry for
  • BRENDA references for (Recommended.)
  • PubMed references for
  • PubMed Central references for
  • Google Scholar references for
  • Kaufman EE, Nelson T, Fales HM, Levin DM (1988). "Isolation and characterization of a hydroxyacid-oxoacid transhydrogenase from rat kidney mitochondria". J. Biol. Chem. 263: 16872&ndash, 9. PMID 3182820.

External links

The CAS registry number for this enzyme class is 117698-31-4.

Gene Ontology (GO) codes