4-Hydroxybutyrate dehydrogenase

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4-hydroxybutyrate dehydrogenase
EC no.
IntEnzIntEnz view
ExPASyNiceZyme view
MetaCycmetabolic pathway
PDB structuresRCSB PDB PDBe PDBsum
Gene OntologyAmiGO / QuickGO

In enzymology, a 4-hydroxybutyrate dehydrogenase (EC is an enzyme that catalyzes the chemical reaction

4-hydroxybutanoate + NAD+ succinate semialdehyde + NADH + H+

The two substrates of this enzyme are therefore 4-hydroxybutanoic acid, and NAD+, whereas its 3 products are succinate semialdehyde, 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.[1] The systematic name of this enzyme class is 4-hydroxybutanoate:NAD+ oxidoreductase. This enzyme is also called gamma-hydroxybutyrate dehydrogenase. This enzyme participates in butanoate metabolism and the degradation of the neurotransmitter 4-hydroxybutanoic acid.[2]


  1. ^ Nirenberg MW, Jakoby WB (1960). "Enzymatic utilization of gamma-hydroxybutyric acid". J. Biol. Chem. 235: 954–960. PMID 14427301.
  2. ^ Kaufman EE, Nelson T (1991). "An overview of gamma-hydroxybutyrate catabolism: the role of the cytosolic NADP+-dependent oxidoreductase EC and of a mitochondrial hydroxyacid-oxoacid transhydrogenase in the initial, rate-limiting step in this pathway". Neurochem. Res. 16 (9): 965–974. doi:10.1007/BF00965839. PMID 1784339.