The enzyme contains thiamine diphosphate and two [4Fe-4S] clusters. Highly specific for 2-oxoglutarate. This enzyme is a member of the 2-oxoacid oxidoreductases, a family of enzymes that oxidatively decarboxylate different 2-oxoacids to form their CoA derivatives, and are differentiated based on their substrate specificity. For examples of other members of this family, see EC 220.127.116.11, pyruvate synthase and EC 18.104.22.168, 3-methyl-2-oxobutanoate dehydrogenase (ferredoxin).
Buchanan, B.B. and Evans, M.C.W. The synthesis of α-ketoglutarate from succinate and carbon dioxide by a subcellular preparation of a photosynthetic bacterium. Proc. Natl. Acad. Sci. USA54 (1965) 1212–1218. [DOI] [PMID: 4286833]
Gehring, U. and Arnon, D.I. Purification and properties of α-ketoglutarate synthase from a photosynthetic bacterium. J. Biol. Chem.247 (1972) 6963–6969. [PMID: 4628267]
Dorner, E. and Boll, M. Properties of 2-oxoglutarate:ferredoxin oxidoreductase from Thauera aromatica and its role in enzymatic reduction of the aromatic ring. J. Bacteriol.184 (2002) 3975–3983. [DOI] [PMID: 12081970]
Mai, X. and Adams, M.W. Characterization of a fourth type of 2-keto acid-oxidizing enzyme from a hyperthermophilic archaeon: 2-ketoglutarate ferredoxin oxidoreductase from Thermococcus litoralis. J. Bacteriol.178 (1996) 5890–5896. [DOI] [PMID: 8830683]
Schut, G.J., Menon, A.L. and Adams, M.W.W. 2-Keto acid oxidoreductases from Pyrococcus furiosus and Thermococcus litoralis. Methods Enzymol.331 (2001) 144–158. [DOI] [PMID: 11265457]