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.

Citrate synthase/methylcitrate synthase; Catalyzes the formation of citrate from acetyl-CoA and oxaloacetate; Derived by automated computational analysis using gene prediction method: Protein Homology.

Alpha-ketoglutarate decarboxylase; Kgd; produces succinic semialdehyde; part of alternative pathway from alpha-ketoglutarate to succinate; essential for normal growth; 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.

Isocitrate dehydrogenase; NADP-specific, catalyzes the formation of 2-oxoglutarate from isocitrate or oxalosuccinate; Derived by automated computational analysis using gene prediction method: Protein Homology; Belongs to the monomeric-type IDH family.

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

succinyl-CoA synthetase subunit alpha; 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.

Pyruvate kinase; Catalyzes the formation of phosphoenolpyruvate from pyruvate; Derived by automated computational analysis using gene prediction method: Protein Homology.

Part of four member fumarate reductase enzyme complex FrdABCD which catalyzes the reduction of fumarate to succinate during anaerobic respiration; FrdAB are the catalytic subcomplex consisting of a flavoprotein subunit and an iron-sulfur subunit, respectively; FrdCD are the membrane components which interact with quinone and are involved in electron transfer; the catalytic subunits are similar to succinate dehydrogenase SdhAB; Derived by automated computational analysis using gene prediction method: Protein Homology.