ID PYRG_ANAPZ Reviewed; 541 AA. AC Q2GLS9; DT 12-DEC-2006, integrated into UniProtKB/Swiss-Prot. DT 21-MAR-2006, sequence version 1. DT 02-SEP-2026, entry version 110. DE RecName: Full=CTP synthase {ECO:0000255|HAMAP-Rule:MF_01227}; DE EC=6.3.4.2 {ECO:0000255|HAMAP-Rule:MF_01227}; DE AltName: Full=Cytidine 5'-triphosphate synthase {ECO:0000255|HAMAP-Rule:MF_01227}; DE AltName: Full=Cytidine triphosphate synthetase {ECO:0000255|HAMAP-Rule:MF_01227}; DE Short=CTP synthetase {ECO:0000255|HAMAP-Rule:MF_01227}; DE Short=CTPS {ECO:0000255|HAMAP-Rule:MF_01227}; DE AltName: Full=UTP--ammonia ligase {ECO:0000255|HAMAP-Rule:MF_01227}; GN Name=pyrG {ECO:0000255|HAMAP-Rule:MF_01227}; GN OrderedLocusNames=APH_0038; OS Anaplasma phagocytophilum (strain HZ). OC Bacteria; Pseudomonadati; Pseudomonadota; Alphaproteobacteria; OC Rickettsiales; Anaplasmataceae; Anaplasma; phagocytophilum group. OX NCBI_TaxID=212042; RN [1] RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. RC STRAIN=HZ; RX PubMed=16482227; DOI=10.1371/journal.pgen.0020021; RA Dunning Hotopp J.C., Lin M., Madupu R., Crabtree J., Angiuoli S.V., RA Eisen J.A., Seshadri R., Ren Q., Wu M., Utterback T.R., Smith S., Lewis M., RA Khouri H., Zhang C., Niu H., Lin Q., Ohashi N., Zhi N., Nelson W.C., RA Brinkac L.M., Dodson R.J., Rosovitz M.J., Sundaram J.P., Daugherty S.C., RA Davidsen T., Durkin A.S., Gwinn M.L., Haft D.H., Selengut J.D., RA Sullivan S.A., Zafar N., Zhou L., Benahmed F., Forberger H., Halpin R., RA Mulligan S., Robinson J., White O., Rikihisa Y., Tettelin H.; RT "Comparative genomics of emerging human ehrlichiosis agents."; RL PLoS Genet. 2:208-222(2006). CC -!- FUNCTION: Catalyzes the ATP-dependent amination of UTP to CTP with CC either L-glutamine or ammonia as the source of nitrogen. Regulates CC intracellular CTP levels through interactions with the four CC ribonucleotide triphosphates. {ECO:0000255|HAMAP-Rule:MF_01227}. CC -!- CATALYTIC ACTIVITY: CC Reaction=UTP + L-glutamine + ATP + H2O = CTP + L-glutamate + ADP + CC phosphate + 2 H(+); Xref=Rhea:RHEA:26426, ChEBI:CHEBI:15377, CC ChEBI:CHEBI:15378, ChEBI:CHEBI:29985, ChEBI:CHEBI:30616, CC ChEBI:CHEBI:37563, ChEBI:CHEBI:43474, ChEBI:CHEBI:46398, CC ChEBI:CHEBI:58359, ChEBI:CHEBI:456216; EC=6.3.4.2; CC Evidence={ECO:0000255|HAMAP-Rule:MF_01227}; CC -!- CATALYTIC ACTIVITY: CC Reaction=L-glutamine + H2O = L-glutamate + NH4(+); CC Xref=Rhea:RHEA:15889, ChEBI:CHEBI:15377, ChEBI:CHEBI:28938, CC ChEBI:CHEBI:29985, ChEBI:CHEBI:58359; Evidence={ECO:0000255|HAMAP- CC Rule:MF_01227}; CC -!- CATALYTIC ACTIVITY: CC Reaction=UTP + NH4(+) + ATP = CTP + ADP + phosphate + 2 H(+); CC Xref=Rhea:RHEA:16597, ChEBI:CHEBI:15378, ChEBI:CHEBI:28938, CC ChEBI:CHEBI:30616, ChEBI:CHEBI:37563, ChEBI:CHEBI:43474, CC ChEBI:CHEBI:46398, ChEBI:CHEBI:456216; Evidence={ECO:0000255|HAMAP- CC Rule:MF_01227}; CC -!- ACTIVITY REGULATION: Allosterically activated by GTP, when glutamine is CC the substrate; GTP has no effect on the reaction when ammonia is the CC substrate. The allosteric effector GTP functions by stabilizing the CC protein conformation that binds the tetrahedral intermediate(s) formed CC during glutamine hydrolysis. Inhibited by the product CTP, via CC allosteric rather than competitive inhibition. {ECO:0000255|HAMAP- CC Rule:MF_01227}. CC -!- PATHWAY: Pyrimidine metabolism; CTP biosynthesis via de novo pathway; CC CTP from UDP: step 2/2. {ECO:0000255|HAMAP-Rule:MF_01227}. CC -!- SUBUNIT: Homotetramer. {ECO:0000255|HAMAP-Rule:MF_01227}. CC -!- MISCELLANEOUS: CTPSs have evolved a hybrid strategy for distinguishing CC between UTP and CTP. The overlapping regions of the product feedback CC inhibitory and substrate sites recognize a common feature in both CC compounds, the triphosphate moiety. To differentiate isosteric CC substrate and product pyrimidine rings, an additional pocket far from CC the expected kinase/ligase catalytic site, specifically recognizes the CC cytosine and ribose portions of the product inhibitor. CC {ECO:0000255|HAMAP-Rule:MF_01227}. CC -!- SIMILARITY: Belongs to the CTP synthase family. {ECO:0000255|HAMAP- CC Rule:MF_01227}. CC --------------------------------------------------------------------------- CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms CC Distributed under the Creative Commons Attribution (CC BY 4.0) License CC --------------------------------------------------------------------------- DR EMBL; CP000235; ABD43636.1; -; Genomic_DNA. DR RefSeq; WP_011450198.1; NC_007797.1. DR AlphaFoldDB; Q2GLS9; -. DR SMR; Q2GLS9; -. DR STRING; 212042.APH_0038; -. DR MEROPS; C26.964; -. DR PaxDb; 212042-APH_0038; -. DR EnsemblBacteria; ABD43636; ABD43636; APH_0038. DR GeneID; 92747708; -. DR KEGG; aph:APH_0038; -. DR eggNOG; COG0504; Bacteria. DR HOGENOM; CLU_011675_5_0_5; -. DR UniPathway; UPA00159; UER00277. DR Proteomes; UP000001943; Chromosome. DR GO; GO:0097268; C:cytoophidium; IEA:UniProtKB-ARBA. DR GO; GO:0005829; C:cytosol; IEA:TreeGrafter. DR GO; GO:0003883; F:CTP synthase activity; IEA:UniProtKB-UniRule. DR GO; GO:0004359; F:glutaminase activity; IEA:RHEA. DR GO; GO:0042802; F:identical protein binding; IEA:TreeGrafter. DR GO; GO:0044210; P:'de novo' CTP biosynthetic process; IEA:UniProtKB-UniRule. DR GO; GO:0019856; P:pyrimidine nucleobase biosynthetic process; IEA:TreeGrafter. DR CDD; cd03113; CTPS_N; 1. DR CDD; cd01746; GATase1_CTP_Synthase; 1. DR FunFam; 3.40.50.300:FF:000009; CTP synthase; 1. DR FunFam; 3.40.50.880:FF:000002; CTP synthase; 1. DR Gene3D; 3.40.50.880; -; 1. DR Gene3D; 3.40.50.300; P-loop containing nucleotide triphosphate hydrolases; 1. DR HAMAP; MF_01227; PyrG; 1. DR InterPro; IPR029062; Class_I_gatase-like. DR InterPro; IPR004468; CTP_synthase. DR InterPro; IPR017456; CTP_synthase_N. DR InterPro; IPR017926; GATASE. DR InterPro; IPR033828; GATase1_CTP_Synthase. DR InterPro; IPR027417; P-loop_NTPase. DR NCBIfam; NF003792; PRK05380.1; 1. DR NCBIfam; TIGR00337; PyrG; 1. DR PANTHER; PTHR11550; CTP SYNTHASE; 1. DR PANTHER; PTHR11550:SF0; CTP SYNTHASE-RELATED; 1. DR Pfam; PF06418; CTP_synth_N; 1. DR Pfam; PF00117; GATase; 1. DR SUPFAM; SSF52317; Class I glutamine amidotransferase-like; 1. DR SUPFAM; SSF52540; P-loop containing nucleoside triphosphate hydrolases; 1. DR PROSITE; PS51273; GATASE_TYPE_1; 1. PE 3: Inferred from homology; KW ATP-binding; Glutamine amidotransferase; Ligase; Magnesium; Metal-binding; KW Nucleotide-binding; Pyrimidine biosynthesis; Reference proteome. FT CHAIN 1..541 FT /note="CTP synthase" FT /id="PRO_0000266055" FT DOMAIN 296..537 FT /note="Glutamine amidotransferase type-1" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227" FT REGION 1..271 FT /note="Amidoligase domain" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227" FT ACT_SITE 382 FT /note="Nucleophile; for glutamine hydrolysis" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227" FT ACT_SITE 510 FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227" FT ACT_SITE 512 FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227" FT BINDING 19 FT /ligand="CTP" FT /ligand_id="ChEBI:CHEBI:37563" FT /ligand_note="allosteric inhibitor" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227" FT BINDING 19 FT /ligand="UTP" FT /ligand_id="ChEBI:CHEBI:46398" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227" FT BINDING 20..25 FT /ligand="ATP" FT /ligand_id="ChEBI:CHEBI:30616" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227" FT BINDING 77 FT /ligand="ATP" FT /ligand_id="ChEBI:CHEBI:30616" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227" FT BINDING 77 FT /ligand="Mg(2+)" FT /ligand_id="ChEBI:CHEBI:18420" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227" FT BINDING 145 FT /ligand="Mg(2+)" FT /ligand_id="ChEBI:CHEBI:18420" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227" FT BINDING 152..154 FT /ligand="CTP" FT /ligand_id="ChEBI:CHEBI:37563" FT /ligand_note="allosteric inhibitor" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227" FT BINDING 192..197 FT /ligand="CTP" FT /ligand_id="ChEBI:CHEBI:37563" FT /ligand_note="allosteric inhibitor" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227" FT BINDING 192..197 FT /ligand="UTP" FT /ligand_id="ChEBI:CHEBI:46398" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227" FT BINDING 228 FT /ligand="CTP" FT /ligand_id="ChEBI:CHEBI:37563" FT /ligand_note="allosteric inhibitor" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227" FT BINDING 228 FT /ligand="UTP" FT /ligand_id="ChEBI:CHEBI:46398" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227" FT BINDING 355 FT /ligand="L-glutamine" FT /ligand_id="ChEBI:CHEBI:58359" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227" FT BINDING 383..386 FT /ligand="L-glutamine" FT /ligand_id="ChEBI:CHEBI:58359" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227" FT BINDING 406 FT /ligand="L-glutamine" FT /ligand_id="ChEBI:CHEBI:58359" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227" FT BINDING 465 FT /ligand="L-glutamine" FT /ligand_id="ChEBI:CHEBI:58359" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227" SQ SEQUENCE 541 AA; 59454 MW; CBB6A8950CB6809E CRC64; MVGKLNPTRF IFVTGGVVSS LGKGLAAASI GALLQARGFS VRLRKLDPYL NVDPGTMSPA QHGEVFVTSD GGETDLDLGH YERFTGVMKT RADNVTAGKI YHELIVKERR GDYLGQTVQV IPHVIDLIIS CILHNDAGAD FVICEIGGTV GDIESQPFLE AIRQVSYRLS KNLTIFVHLT LVPYIGAVGE LKTKPTQHSV KELSSLGIQP DIVLYRSRAQ LPQYQCAKIA NFCNVAEDNI IAALDVSNIY MLPVMYHEHR LDTQILKHFD VDSPEPDLTQ WENVLRMSET ASDRIVIAIV GKYVTSLDAY TSLEEALRHA GLHSGIRVEI KWVDARLPAS EIDLTDADAI LIPGGFGDNG IGTKICAIEY ARVNNIPMLG ICLGMQLAVI EFALNVAGIE DANSTEFKSD CKNPVVCELP GLQVGDEYKM GGSMRLGSYT CNLAPGSRIM SIYDSSTVVE RRRHRYGINP EYRDVLSKCG LAFTGAAEDR DLPEVLELPD HPWFIGVQFH PEFQSTPFKS HPLFLSFVTS TLQVKKASSR S //