Pyruvate dehydrogenase; The pyruvate dehydrogenase complex catalyzes the overall conversion of pyruvate to acetyl-CoA and CO2.

2-oxoisovalerate dehydrogenase; Derived by automated computational analysis using gene prediction method: Protein Homology.

E3 component of alpha keto acid dehydrogenase complexes LpdC; forms a homodimer; binds one molecule of FAD monomer; catalyzes NAD+-dependent oxidation of dihydrolipoyl cofactors that are covalently linked to the E2 component; Derived by automated computational analysis using gene prediction method: Protein Homology.

Catalyzes the oxidation of dihydrolipoamide to lipoamide; Derived by automated computational analysis using gene prediction method: Protein Homology.

SucA; E1 component of the oxoglutarate dehydrogenase complex which catalyzes the formation of succinyl-CoA from 2-oxoglutarate; SucA catalyzes the reaction of 2-oxoglutarate with dihydrolipoamide succinyltransferase-lipoate to form dihydrolipoamide succinyltransferase-succinyldihydrolipoate and carbon dioxide; Derived by automated computational analysis using gene prediction method: Protein Homology.

succinyl-CoA synthetase subunit beta; Succinyl-CoA synthetase functions in the citric acid cycle (TCA), coupling the hydrolysis of succinyl-CoA to the synthesis of either ATP or GTP and thus represents the only step of substrate-level phosphorylation in the TCA. The beta subunit provides nucleotide specificity of the enzyme and binds the substrate succinate, while the binding sites for coenzyme A and phosphate are found in the alpha subunit.

succinate--CoA ligase; Succinyl-CoA synthetase functions in the citric acid cycle (TCA), coupling the hydrolysis of succinyl-CoA to the synthesis of either ATP or GTP and thus represents the only step of substrate-level phosphorylation in the TCA. The alpha subunit of the enzyme binds the substrates coenzyme A and phosphate, while succinate binding and nucleotide specificity is provided by the beta subunit.

Type II enzyme; in Escherichia coli this enzyme forms a trimer of dimers which is allosterically inhibited by NADH and competitively inhibited by alpha-ketoglutarate; allosteric inhibition is lost when Cys206 is chemically modified which also affects hexamer formation; forms oxaloacetate and acetyl-CoA and water from citrate and coenzyme A; functions in TCA cycle, glyoxylate cycle and respiration; enzyme from Helicobacter pylori is not inhibited by NADH; Derived by automated computational analysis using gene prediction method: Protein Homology; Belongs to the citrate synthase family.