3-Isopropylmalate dehydrogenase

3-Isopropylmalate dehydrogenase
Identifiers
EC no.1.1.1.85
CAS no.9030-97-1
Databases
IntEnzIntEnz view
BRENDABRENDA entry
ExPASyNiceZyme view
KEGGKEGG entry
MetaCycmetabolic pathway
PRIAMprofile
PDB structuresRCSB PDB PDBe PDBsum
Gene OntologyAmiGO / QuickGO
Search
PMCarticles
PubMedarticles
NCBIproteins

3-Isopropylmalate dehydrogenase (EC 1.1.1.85) is an enzyme that is a part of the isopropylmalate dehydrogenase family, which catalyzes the overall chemical reaction:

(2R,3S)-3-isopropylmalic acid
 
 
 
H+
 
H+
 
+ CO2 + NADH
 

The first step is an oxidation reaction in which the cofactor, oxidised nicotinamide adenine dinucleotide (NAD+), converts the hydroxy group of the malic acid derivative into the corresponding keto group. This spontaneously decarboxylates to give the observed product.