Conserved hypothetical ATP phosphoribosyltransferase regulatory subunit; Required for the first step of histidine biosynthesis. May allow the feedback regulation of ATP phosphoribosyltransferase activity by histidine.

Imidazole glycerol phosphate synthase subunit; IGPS catalyzes the conversion of PRFAR and glutamine to IGP, AICAR and glutamate. The HisF subunit catalyzes the cyclization activity that produces IGP and AICAR from PRFAR using the ammonia provided by the HisH subunit.

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.

Probable methionine synthase; Catalyzes the transfer of a methyl group from methyl- cobalamin to homocysteine, yielding enzyme-bound cob(I)alamin and methionine. Subsequently, remethylates the cofactor using methyltetrahydrofolate.

Putative chromosomal replication initiator protein; Region start changed from 3447165 to 3447246 (-81 bases); Belongs to the DnaA family.

Probable poly(A) polymerase; Adds poly(A) tail to the 3' end of many RNAs, which usually targets these RNAs for decay. Plays a significant role in the global control of gene expression, through influencing the rate of transcript degradation, and in the general RNA quality control. Belongs to the tRNA nucleotidyltransferase/poly(A) polymerase family.

Deoxyguanosine kinase, probable (2.7.1.113) InterPro: Thymidylate kinase DTMP_kinase: thymidylate kinase; Family membership.

Histidine amidotransferase; IGPS catalyzes the conversion of PRFAR and glutamine to IGP, AICAR and glutamate. The HisH subunit catalyzes the hydrolysis of glutamine to glutamate and ammonia as part of the synthesis of IGP and AICAR. The resulting ammonia molecule is channeled to the active site of HisF.

Conserved hypothetical membrane protein. This is a family of hypothetical proteins. A number of the sequence records state they are transmembrane proteins or putative permeases.It is not clear what source suggested that these proteins might be permeases and this information should be treated with caution. TREMBL:Q82Y01: 39% identity; 58% similarity. TREMBL:Q8XW51: 37% identity; 53% similarity. InterPro:IPR002549 Pfam: PF01594:Protein of unknown function DUF70 Signal P predicted signal peptide and TMHMM predicted transmembrane helices; Conserved hypothetical protein.