RNase PH; Phosphorolytic 3'-5' exoribonuclease that plays an important role in tRNA 3'-end maturation. Removes nucleotide residues following the 3'-CCA terminus of tRNAs; can also add nucleotides to the ends of RNA molecules by using nucleoside diphosphates as substrates, but this may not be physiologically important. Probably plays a role in initiation of 16S rRNA degradation (leading to ribosome degradation) during starvation.

Possible oxygen-independent coproporphyrinogen III oxidase; Probably acts as a heme chaperone, transferring heme to an unknown acceptor. Binds one molecule of heme per monomer, possibly covalently. Binds 1 [4Fe-4S] cluster. The cluster is coordinated with 3 cysteines and an exchangeable S-adenosyl-L-methionine. Belongs to the anaerobic coproporphyrinogen-III oxidase family.

Inosine-5'-monophosphate dehydrogenase; Catalyzes the conversion of inosine 5'-phosphate (IMP) to xanthosine 5'-phosphate (XMP), the first committed and rate-limiting step in the de novo synthesis of guanine nucleotides, and therefore plays an important role in the regulation of cell growth. Belongs to the IMPDH/GMPR family.

Nucleoside diphosphate kinase (ndk); Major role in the synthesis of nucleoside triphosphates other than ATP. The ATP gamma phosphate is transferred to the NDP beta phosphate via a ping-pong mechanism, using a phosphorylated active-site intermediate; Belongs to the NDK family.

Xanthine-guanine phosphoribosyltransferase; Acts on guanine, xanthine and to a lesser extent hypoxanthine; Belongs to the purine/pyrimidine phosphoribosyltransferase family. XGPT subfamily.

Putative amidotransferase; Similar, in part, to Salmonella typhimurium LT2 hypothetical protein yfeJ SW:YFEJ_SALTY (P40194) (170 aa) fasta scores: E(): 0, 89.0% id in 155 aa. The similarity ends due to a deletion in S. typhimurium with respect to S. typhi. Similar to Zymomonas mobilis hypothetical protein TR:Q9RQD2 (EMBL:AF117351) (251 aa) fasta scores: E(): 0, 53.1% id in 239 aa and Pseudomonas aeruginosa probable glutamine amidotransferase PA0531 TR:AAG03920 (EMBL:AE004489) (238 aa) fasta scores: E(): 2.1e-16, 31.9% id in 238 aa.

Hypoxanthine phosphoribosyltransferase; Orthologue of E. coli hpt (HPRT_ECOLI); Fasta hit to HPRT_ECOLI (182 aa), 95% identity in 171 aa overlap; Belongs to the purine/pyrimidine phosphoribosyltransferase family.

Stationary-phase survival protein; Nucleotidase with a broad substrate specificity as it can dephosphorylate various ribo- and deoxyribonucleoside 5'-monophosphates and ribonucleoside 3'-monophosphates with highest affinity to 3'-AMP. Also hydrolyzes polyphosphate (exopolyphosphatase activity) with the preference for short-chain-length substrates (P20-25). Might be involved in the regulation of dNTP and NTP pools, and in the turnover of 3'-mononucleotides produced by numerous intracellular RNases (T1, T2, and F) during the degradation of various RNAs.

Hypothetical protein; Similar to several 5' nucleosidase family proteins e.g. Thermotoga maritima UDP-sugar hydrolase TR:Q9X2J1 (EMBL:AE001824) (508 aa) fasta scores: E(): 1.1e-30, 32.6% id in 509 aa; Belongs to the 5'-nucleotidase family.