Part of four member succinate dehydrogenase enzyme complex that forms a trimeric complex (trimer of tetramers); SdhA/B are the catalytic subcomplex and can exhibit succinate dehydrogenase activity in the absence of SdhC/D which are the membrane components and form cytochrome b556; SdhC binds ubiquinone; oxidizes succinate to fumarate while reducing ubiquinone to ubiquinol; the catalytic subunits are similar to fumarate reductase; Derived by automated computational analysis using gene prediction method: Protein Homology.

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.

Malate dehydrogenase; Derived by automated computational analysis using gene prediction method: Protein Homology.

Phosphate acetyltransferase; Derived by automated computational analysis using gene prediction method: Protein Homology.

Pyruvate carboxylase subunit B; Catalyzes the formation of oxaloacetate from pyruvate; Derived by automated computational analysis using gene prediction method: Protein Homology.

Aconitate hydratase B; Catalyzes the conversion of citrate to isocitrate and the conversion of 2-methylaconitate to 2-methylisocitrate; Derived by automated computational analysis using gene prediction method: Protein Homology; Belongs to the aconitase/IPM isomerase family.

Succinate dehydrogenase; Derived by automated computational analysis using gene prediction method: Protein Homology.

succinate--CoA ligase 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.

Glycine dehydrogenase (aminomethyl-transferring); The glycine cleavage system catalyzes the degradation of glycine. The P protein binds the alpha-amino group of glycine through its pyridoxal phosphate cofactor; CO(2) is released and the remaining methylamine moiety is then transferred to the lipoamide cofactor of the H protein; Belongs to the GcvP family.