Isocitrate dehydrogenases catalyze the oxidative decarboxylation of isocitrate to 2-oxoglutarate.These enzymes belong to two distinct subclasses, one of which utilizes NAD(+) as the electron acceptor and the other NADP(+).Five isocitrate dehydrogenases have been reported: three NAD(+)-dependent isocitrate dehydrogenases, which localize to the mitochondrial matrix, and two NADP(+)-dependent isocitrate dehydrogenases, one of which is mitochondrial and the other predominantly cytosolic.Each NADP(+)-dependent isozyme is a homodimer.The protein encoded by this gene is the NADP(+)-dependent isocitrate dehydrogenase found in the mitochondria.It plays a role in intermediary metabolism and energy production.This protein may tightly associate or interact with the pyruvate dehydrogenase complex.[provided by RefSeq] Synonyms: ICD-M