Kinetic Mechanism of Glutaryl-CoA Dehydrogenase
- 1 December 2006
- journal article
- research article
- Published by American Chemical Society (ACS) in Biochemistry
- Vol. 45 (51), 15853-15861
- https://doi.org/10.1021/bi0609016
Abstract
Glutaryl-CoA dehydrogenase (GCD) is a homotetrameric enzyme containing one noncovalently bound FAD per monomer that oxidatively decarboxylates glutaryl-CoA to crotonyl-CoA and CO2. GCD belongs to the family of acyl-CoA dehydrogenases that are evolutionarily conserved in their sequence, structure, and function. However, there are differences in the kinetic mechanisms among the different acyl-CoA dehydrogenases. One of the unanswered aspects is that of the rate-determining step in the steady-state turnover of GCD. In the present investigation, the major rate-determining step is identified to be the release of crotonyl-CoA product because the chemical steps and reoxidation of reduced FAD are much faster than the turnover of the wild-type GCD. Other steps are only partially rate-determining. This conclusion is based on the transit times of the individual reactions occurring in the active site of GCD.Keywords
This publication has 8 references indexed in Scilit:
- The Function of Arg-94 in the Oxidation and Decarboxylation of Glutaryl-CoA by Human Glutaryl-CoA DehydrogenasePublished by Elsevier BV ,2001
- Location of the Two Genes Encoding Glutaconate Coenzyme A-Transferase at the Beginning of the Hydroxyglutarate Operon in Acidaminococcus fermentansEuropean Journal of Biochemistry, 1994
- Extremely Large Isotope Effects in the Soybean Lipoxygenase-Linoleic Acid ReactionJournal of the American Chemical Society, 1994
- [10] Determination of short-chain coenzyme A compounds by reversed-phase high-performance liquid chromatographyMethods in enzymology, 1988
- Studies on the reaction mechanism of general acyl‐CoA dehydrogenaseEuropean Journal of Biochemistry, 1986
- The purification and characterization of glutaryl-coenzyme A dehydrogenase from porcine and human liver.Journal of Biological Chemistry, 1986
- Glutaconate CoA‐Transferase from Acidaminococcus fermentansEuropean Journal of Biochemistry, 1981
- 5 Enzymology of Proton Abstraction and Transfer ReactionsPublished by Elsevier BV ,1970