Serine hydroxymethyltransferase; Catalyzes the reversible interconversion of serine and glycine with tetrahydrofolate (THF) serving as the one-carbon carrier. This reaction serves as the major source of one-carbon groups required for the biosynthesis of purines, thymidylate, methionine, and other important biomolecules. Also exhibits THF-independent aldolase activity toward beta-hydroxyamino acids, producing glycine and aldehydes, via a retro-aldol mechanism.

Phosphoserine phosphatase; Derived by automated computational analysis using gene prediction method: Protein Homology.

Malate synthase A; Catalyzes the aldol condensation of glyoxylate with acetyl-CoA to form malate as part of the second step of the glyoxylate bypass and an alternative to the tricarboxylic acid cycle; Derived by automated computational analysis using gene prediction method: Protein Homology.

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.

Glycerate dehydrogenase; Catalyzes the reduction of hydroxypyruvate to form D-glycerate, using NADH as an electron donor; Derived by automated computational analysis using gene prediction method: Protein Homology; Belongs to the D-isomer specific 2-hydroxyacid dehydrogenase family.

Glycine cleavage system protein T; Catalyzes the transfer of a methylene carbon from the methylamine-loaded GcvH protein to tetrahydrofolate, causing the release of ammonia and the generation of reduced GcvH protein; Derived by automated computational analysis using gene prediction method: Protein Homology.

Threonine dehydratase; Catalyzes the anaerobic formation of alpha-ketobutyrate and ammonia from threonine in a two-step reaction. The first step involved a dehydration of threonine and a production of enamine intermediates (aminocrotonate), which tautomerizes to its imine form (iminobutyrate). Both intermediates are unstable and short-lived. The second step is the nonenzymatic hydrolysis of the enamine/imine intermediates to form 2- ketobutyrate and free ammonia. In the low water environment of the cell, the second step is accelerated by RidA.

Threonine aldolase; Low- specificity; catalyzes the formation of acetaldehyde and glycine from L-threonine; acts on L-threonine, L-allo-threonine, L-threo-phenylserine, and L-erythro-phenylserine; Derived by automated computational analysis using gene prediction method: Protein Homology.