Biology:3-Isopropylmalate dehydrogenase

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Short description: InterPro Family
3-Isopropylmalate dehydrogenase
Identifiers
EC number1.1.1.85
CAS number9030-97-1
Databases
IntEnzIntEnz view
BRENDABRENDA entry
ExPASyNiceZyme view
KEGGKEGG entry
MetaCycmetabolic pathway
PRIAMprofile
PDB structuresRCSB PDB PDBe PDBsum
Gene OntologyAmiGO / QuickGO

3-Isopropylmalate dehydrogenase (EC 1.1.1.85) is an enzyme that is a part of the isopropylmalate dehydrogenase family, which catalyzes the chemical reactions:[1][2][3][4]

(2R,3S)-3-isopropylmalate + NAD+ [math]\displaystyle{ \rightleftharpoons }[/math] 4-methyl-2-oxopentanoate + CO2 + NADH
(2R,3S)-3-isopropylmalate + NAD+ [math]\displaystyle{ \rightleftharpoons }[/math] (2S)-2-isopropyl-3-oxosuccinate + H+ + NADH
(2S)-2-isopropyl-3-oxosuccinate + H+ [math]\displaystyle{ \rightleftharpoons }[/math] 4-methyl-2-oxopentanoate + CO2

References

  1. "The biosynthesis of leucine. III. The conversion of α-hydroxy-β-carboxyisocaproate to α-ketoisocaproate.". Biochemistry 2 (5): 1053–8. 1963. doi:10.1021/bi00905a024. PMID 14087358. 
  2. "The Absolute Configuration of α-carboxyisocaproic Acid (3-Isopropylmalic Acid), an Intermediate in Leucine Biosynthesis". Biochemistry 3 (12): 2024–7. December 1964. doi:10.1021/bi00900a043. PMID 14269331. 
  3. "Purification and Properties of β-Isopropylmalate Dehydrogenase". J. Biol. Chem. 244 (3): 996–1003. February 1969. PMID 4889950. 
  4. "Mirror image mutations reveal the significance of an intersubunit ion cluster in the stability of 3-isopropylmalate dehydrogenase". FEBS Lett. 468 (1): 48–52. February 2000. doi:10.1016/S0014-5793(00)01190-X. PMID 10683439.