Probable thymidylate synthase ThyX (ts) (TSase); Catalyzes the reductive methylation of 2'-deoxyuridine-5'- monophosphate (dUMP) to 2'-deoxythymidine-5'-monophosphate (dTMP) while utilizing 5,10-methylenetetrahydrofolate (mTHF) as the methyl donor, and NADPH and FADH(2) as the reductant. Is essential for growth of the pathogen on solid media in vitro; the essential function is something other than dTMP synthase.

Deoxyuridine 5'-triphosphate nucleotidohydrolase; This enzyme is involved in nucleotide metabolism: it produces dUMP, the immediate precursor of thymidine nucleotides and it decreases the intracellular concentration of dUTP so that uracil cannot be incorporated into DNA; Belongs to the dUTPase family.

Probable folylpolyglutamate synthase protein FolC (folylpoly-gamma-glutamate synthetase) (FPGS); Catalyzes the addition of a glutamate residue to dihydropteroate (7,8-dihydropteroate or H2Pte) to form dihydrofolate (7,8-dihydrofolate monoglutamate or H2Pte-Glu). Also catalyzes successive additions of L-glutamate to tetrahydrofolate, leading to folylpolyglutamate derivatives (By similarity).

Methenyltetrahydrofolate cyclohydrolase; Catalyzes the oxidation of 5,10-methylenetetrahydrofolate to 5,10-methenyltetrahydrofolate and then the hydrolysis of 5,10- methenyltetrahydrofolate to 10-formyltetrahydrofolate.

Serine hydroxymethyltransferase GlyA2 (serine methylase 2) (SHMT 2); 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. Thus, is able to catalyze the cleavage of L- allo-threonine; Belongs to the SHMT family.

Serine hydroxymethyltransferase 1 GlyA1; 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. Thus, is able to catalyze the cleavage of L- allo-threonine; Belongs to the SHMT family.

Thymidylate kinase Tmk (dTMP kinase) (thymidylic acid kinase) (TMPK); Catalyzes the reversible phosphorylation of deoxythymidine monophosphate (dTMP) to deoxythymidine diphosphate (dTDP), using ATP as its preferred phosphoryl donor. Situated at the junction of both de novo and salvage pathways of deoxythymidine triphosphate (dTTP) synthesis, is essential for DNA synthesis and cellular growth. Has a broad specificity for nucleoside triphosphates, being highly active with ATP or dATP as phosphate donors, and less active with ITP, GTP, CTP and UTP; Belongs to the thymidylate kinase family.

Probable aminomethyltransferase GcvT (glycine cleavage system T protein); The glycine cleavage system catalyzes the degradation of glycine; Belongs to the GcvT family.

Possible phosphoglycerate mutase Gpm2 (phosphoglyceromutase) (PGAM) (BPG-dependent PGAM); Phosphatase with a broad specificity. Can dephosphorylate a variety of substrates including phosphorylated sugars like fructose-6- phosphate (F6P). Is able to function in vivo as a fructose-1,6-bisphosphatase (FBPase) and to maintain gluconeogenesis when the classical FBPase GlpX is absent. Shows negligible phosphoglycerate mutase activity. Has no phosphatase activity against 3-phosphoglycerate, 2,3- bisphosphoglycerate, or hydrophobic substrates such as alpha-napthyl phosphate.