IUBMB Enzyme Nomenclature

EC 1.3.8.6

Accepted name: glutaryl-CoA dehydrogenase (decarboxylating)

Reaction: glutaryl-CoA + electron-transfer flavoprotein = crotonyl-CoA + CO2 + reduced electron-transfer flavoprotein (overall reaction)
(1a) glutaryl-CoA + electron-transfer flavoprotein = (E)-glutaconyl-CoA + reduced electron-transfer flavoprotein
(1b) (E)-glutaconyl-CoA = crotonyl-CoA + CO2

For diagram of reaction click here.

Glossary: (E)-glutaconyl-CoA = (2E)-4-carboxybut-2-enoyl-CoA
crotonyl-CoA = (E)-but-2-enoyl-CoA

Other name(s): glutaryl coenzyme A dehydrogenase; glutaryl-CoA:(acceptor) 2,3-oxidoreductase (decarboxylating); glutaryl-CoA dehydrogenase

Systematic name: glutaryl-CoA:electron-transfer flavoprotein 2,3-oxidoreductase (decarboxylating)

Comments: Contains FAD. The enzyme catalyses the oxidation of glutaryl-CoA to glutaconyl-CoA (which remains bound to the enzyme), and the decarboxylation of the latter to crotonyl-CoA (cf. EC 4.1.1.70, glutaconyl-CoA decarboxylase). FAD is the electron acceptor in the oxidation of the substrate, and its reoxidation by electron-transfer flavoprotein completes the catalytic cycle. The anaerobic, sulfate-reducing bacterium Desulfococcus multivorans contains two glutaryl-CoA dehydrogenases: a decarboxylating enzyme (this entry), and a non-decarboxylating enzyme that only catalyses the oxidation to glutaconyl-CoA (EC 1.3.99.32).

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, UM-BBD, CAS registry number: 37255-38-2

References:

1. Besrat, A., Polan, C.E. and Henderson, L.M. Mammalian metabolism of glutaric acid. J. Biol. Chem. 244 (1969) 1461-1467. [PMID: 4304226]

2. Hartel, U., Eckel, E., Koch, J., Fuchs, G., Linder, D. and Buckel, W. Purification of glutaryl-CoA dehydrogenase from Pseudomonas sp., an enzyme involved in the anaerobic degradation of benzoate. Arch. Microbiol. 159 (1993) 174-181. [PMID: 8439237]

3. Dwyer, T.M., Zhang, L., Muller, M., Marrugo, F. and Frerman, F. The functions of the flavin contact residues, αArg249 and βTyr16, in human electron transfer flavoprotein. Biochim. Biophys. Acta 1433 (1999) 139-152. [PMID: 10446367]

4. Rao, K.S., Albro, M., Dwyer, T.M. and Frerman, F.E. Kinetic mechanism of glutaryl-CoA dehydrogenase. Biochemistry 45 (2006) 15853-15861. [PMID: 17176108]

[EC 1.3.8.6 created 1972 as EC 1.3.99.7, transferred 2012 to EC 1.3.8.6, modified 2013]


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