Carries out condensation and ring closure step after PdxA in pyridoxine biosynthesis; Catalyzes the complicated ring closure reaction between the two acyclic compounds 1-deoxy-D-xylulose-5-phosphate (DXP) and 3-amino- 2-oxopropyl phosphate (1-amino-acetone-3-phosphate or AAP) to form pyridoxine 5'-phosphate (PNP) and inorganic phosphate.

Pyridoxal-pyridoxamine kinase; B6-vitamer kinase involved in the salvage pathway of pyridoxal 5'-phosphate (PLP). Catalyzes the phosphorylation of pyridoxine (PN), pyridoxal (PL), and pyridoxamine (PM), forming their respective 5'-phosphorylated esters, i.e. PNP, PLP and PMP. Belongs to the pyridoxine kinase family. PdxK subfamily.

Putative sugar kinase; Ribokinase family; similar to E. coli putative kinase (AAD13445.1); Blastp hit to AAD13445.1 (300 aa), 28% identity in aa 14 - 297; Belongs to the carbohydrate kinase PfkB family.

Putative gntR family regulatory protein; Acts as transcriptional repressor of the pdxK gene, encoding a pyridoxal kinase involved in the vitamin B6 salvage pathway. Also represses transcription of its own gene. Binds to the ptsJ-pdxK intergenic region, but does not bind pdxY and pdxH promoters. Among all six B6 vitamers, only pyridoxal 5'-phosphate (PLP) clearly binds to the protein and acts as an effector molecule for PtsJ, inducing a protein conformational change that increases affinity for DNA. Thus, PLP stabilizes protein-DNA interactions, reinforcing repression. In the C-terminal [...]

Putative cysteine synthase/cystathionine beta-synthase; Similar to E. coli cysteine synthase B, O-acetylserine sulfhydrolase B (AAC75474.1); Blastp hit to AAC75474.1 (303 aa), 26% identity in aa 6 - 207, 35% identity in aa 198 - 289.

Hydroxy-phosphomethylpyrimidine kinase (HMP-P kinase); Catalyzes the phosphorylation of hydroxymethylpyrimidine phosphate (HMP-P) to HMP-PP, and of HMP to HMP-P. Belongs to the ThiD family.

Putative hydrolase of the HAD superfamily; Similar to E. coli putative phosphatase (AAC73853.1); Blastp hit to AAC73853.1 (272 aa), 84% identity in aa 1 - 272.

Tyrosine tRNA synthetase; Catalyzes the attachment of tyrosine to tRNA(Tyr) in a two- step reaction: tyrosine is first activated by ATP to form Tyr-AMP and then transferred to the acceptor end of tRNA(Tyr); Belongs to the class-I aminoacyl-tRNA synthetase family. TyrS type 1 subfamily.

3-phosphoserine aminotransferase; Catalyzes the reversible conversion of 3- phosphohydroxypyruvate to phosphoserine and of 3-hydroxy-2-oxo-4- phosphonooxybutanoate to phosphohydroxythreonine; Belongs to the class-V pyridoxal-phosphate-dependent aminotransferase family. SerC subfamily.