3-hydroxy-2-methylbutyryl-CoA dehydrogenase

3-hydroxy-2-methylbutyryl-CoA dehydrogenase
EC number
CAS number 52227-66-4
IntEnz IntEnz view
ExPASy NiceZyme view
MetaCyc metabolic pathway
PRIAM profile
PDB structures RCSB PDB PDBe PDBsum
Gene Ontology AmiGO / EGO

In enzymology, a 3-hydroxy-2-methylbutyryl-CoA dehydrogenase (EC is an enzyme that catalyzes the chemical reaction

(2S,3S)-3-hydroxy-2-methylbutanoyl-CoA + NAD+ 2-methylacetoacetyl-CoA + NADH + H+

Thus, the two substrates of this enzyme are (2S,3S)-3-hydroxy-2-methylbutanoyl-CoA and NAD+, whereas its 3 products are 2-methylacetoacetyl-CoA, 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 (2S,3S)-3-hydroxy-2-methylbutanoyl-CoA:NAD+ oxidoreductase. Other names in common use include 2-methyl-3-hydroxybutyryl coenzyme A dehydrogenase, 2-methyl-3-hydroxybutyryl coenzyme A dehydrogenase, and 2-methyl-3-hydroxy-butyryl CoA dehydrogenase. This enzyme participates in valine, leucine and isoleucine degradation.

Structural studies

As of 20 January 2010, 6 structure have been solved for this class of enzymes, with the PDB accession code 1E3S, 1E3W, 1E6W, 1SO8, 1U7T, 2O23.


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