ID A0A349FGU8_VIBSX Unreviewed; 545 AA. AC A0A349FGU8; DT 07-NOV-2018, integrated into UniProtKB/TrEMBL. DT 07-NOV-2018, sequence version 1. DT 19-JAN-2022, entry version 12. DE RecName: Full=CTP synthase {ECO:0000256|HAMAP-Rule:MF_01227}; DE EC=6.3.4.2 {ECO:0000256|HAMAP-Rule:MF_01227}; DE AltName: Full=Cytidine 5'-triphosphate synthase {ECO:0000256|HAMAP-Rule:MF_01227}; DE AltName: Full=Cytidine triphosphate synthetase {ECO:0000256|HAMAP-Rule:MF_01227}; DE Short=CTP synthetase {ECO:0000256|HAMAP-Rule:MF_01227}; DE Short=CTPS {ECO:0000256|HAMAP-Rule:MF_01227}; DE AltName: Full=UTP--ammonia ligase {ECO:0000256|HAMAP-Rule:MF_01227}; GN Name=pyrG {ECO:0000256|HAMAP-Rule:MF_01227, GN ECO:0000313|EMBL:HAS64011.1}; GN ORFNames=DCS35_16500 {ECO:0000313|EMBL:HAS64011.1}; OS Vibrio sp. OC Bacteria; Proteobacteria; Gammaproteobacteria; Vibrionales; Vibrionaceae; OC Vibrio. OX NCBI_TaxID=678 {ECO:0000313|EMBL:HAS64011.1, ECO:0000313|Proteomes:UP000263315}; RN [1] {ECO:0000313|EMBL:HAS64011.1, ECO:0000313|Proteomes:UP000263315} RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. RC STRAIN=UBA8383 {ECO:0000313|EMBL:HAS64011.1}; RX PubMed=30148503; DOI=.1038/nbt.4229; RA Parks D.H., Chuvochina M., Waite D.W., Rinke C., Skarshewski A., RA Chaumeil P.A., Hugenholtz P.; RT "A standardized bacterial taxonomy based on genome phylogeny substantially RT revises the tree of life."; RL Nat. Biotechnol. 36:996-1004(2018). 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:0000256|HAMAP-Rule:MF_01227}. CC -!- CATALYTIC ACTIVITY: CC Reaction=ATP + H2O + L-glutamine + UTP = ADP + CTP + 2 H(+) + L- CC glutamate + phosphate; 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:0000256|ARBA:ARBA00000314, ECO:0000256|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:0000256|HAMAP- CC Rule:MF_01227}. CC -!- PATHWAY: Pyrimidine metabolism; CTP biosynthesis via de novo pathway; CC CTP from UDP: step 2/2. {ECO:0000256|ARBA:ARBA00005171, CC ECO:0000256|HAMAP-Rule:MF_01227}. CC -!- SUBUNIT: Homotetramer. {ECO:0000256|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:0000256|HAMAP-Rule:MF_01227}. CC -!- SIMILARITY: Belongs to the CTP synthase family. CC {ECO:0000256|ARBA:ARBA00007533, ECO:0000256|HAMAP-Rule:MF_01227}. CC -!- CAUTION: Lacks conserved residue(s) required for the propagation of CC feature annotation. {ECO:0000256|HAMAP-Rule:MF_01227}. CC -!- CAUTION: The sequence shown here is derived from an EMBL/GenBank/DDBJ CC whole genome shotgun (WGS) entry which is preliminary data. CC {ECO:0000313|EMBL:HAS64011.1}. 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; DMWE01000525; HAS64011.1; -; Genomic_DNA. DR UniPathway; UPA00159; UER00277. DR Proteomes; UP000263315; Unassembled WGS sequence. DR GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW. DR GO; GO:0005524; F:ATP binding; IEA:UniProtKB-KW. DR GO; GO:0003883; F:CTP synthase activity; IEA:UniProtKB-UniRule. DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW. DR GO; GO:0044210; P:'de novo' CTP biosynthetic process; IEA:UniProtKB-UniPathway. DR GO; GO:0006541; P:glutamine metabolic process; IEA:UniProtKB-KW. DR CDD; cd03113; CTPS_N; 1. DR CDD; cd01746; GATase1_CTP_Synthase; 1. DR Gene3D; 3.40.50.300; -; 1. DR Gene3D; 3.40.50.880; -; 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 PANTHER; PTHR11550; PTHR11550; 1. DR Pfam; PF06418; CTP_synth_N; 1. DR Pfam; PF00117; GATase; 1. DR SUPFAM; SSF52317; SSF52317; 1. DR SUPFAM; SSF52540; SSF52540; 1. DR TIGRFAMs; TIGR00337; PyrG; 1. PE 3: Inferred from homology; KW ATP-binding {ECO:0000256|ARBA:ARBA00022840, ECO:0000256|HAMAP- KW Rule:MF_01227}; KW Glutamine amidotransferase {ECO:0000256|ARBA:ARBA00022962, KW ECO:0000256|HAMAP-Rule:MF_01227}; KW Ligase {ECO:0000256|ARBA:ARBA00022598, ECO:0000256|HAMAP-Rule:MF_01227}; KW Magnesium {ECO:0000256|HAMAP-Rule:MF_01227}; KW Membrane {ECO:0000256|SAM:Phobius}; KW Metal-binding {ECO:0000256|HAMAP-Rule:MF_01227}; KW Nucleotide-binding {ECO:0000256|ARBA:ARBA00022741, ECO:0000256|HAMAP- KW Rule:MF_01227}; KW Pyrimidine biosynthesis {ECO:0000256|ARBA:ARBA00022975, ECO:0000256|HAMAP- KW Rule:MF_01227}; Transmembrane {ECO:0000256|SAM:Phobius}; KW Transmembrane helix {ECO:0000256|SAM:Phobius}. FT TRANSMEM 6..29 FT /note="Helical" FT /evidence="ECO:0000256|SAM:Phobius" FT DOMAIN 5..265 FT /note="CTP_synth_N" FT /evidence="ECO:0000259|Pfam:PF06418" FT DOMAIN 301..535 FT /note="GATase" FT /evidence="ECO:0000259|Pfam:PF00117" FT NP_BIND 15..20 FT /note="ATP" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT NP_BIND 147..149 FT /note="CTP; allosteric inhibitor" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT NP_BIND 187..192 FT /note="CTP; allosteric inhibitor; alternate" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT NP_BIND 187..192 FT /note="UTP; alternate" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT NP_BIND 239..241 FT /note="ATP; via amide nitrogen" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT REGION 1..266 FT /note="Amidoligase domain" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT REGION 380..383 FT /note="L-glutamine binding" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT ACT_SITE 379 FT /note="Nucleophile; for glutamine hydrolysis" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT ACT_SITE 515 FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT ACT_SITE 517 FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT METAL 72 FT /note="Magnesium" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT METAL 140 FT /note="Magnesium" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT BINDING 14 FT /note="CTP; allosteric inhibitor; alternate" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT BINDING 14 FT /note="UTP; alternate" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT BINDING 72 FT /note="ATP" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT BINDING 223 FT /note="CTP; allosteric inhibitor; alternate" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT BINDING 223 FT /note="UTP; alternate" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT BINDING 352 FT /note="L-glutamine; via carbonyl oxygen" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT BINDING 403 FT /note="L-glutamine" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT BINDING 470 FT /note="L-glutamine; via amide nitrogen" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" SQ SEQUENCE 545 AA; 59895 MW; 18E5139D1191D604 CRC64; MTTNYIFVTG GVVSSLGKGI AAASLAAILE ARGLKVTMMK LDPYINVDPG TMSPTQHGEV FVTEDGAETD LDLGHYERFI RTKMTKRNNF TAGRVYSDVL AKERRGDYLG ATIQVIPHIT NAIKDRVISG SQGHDVAIVE VGGTVGDIES LPFMEAIRQL AVEIGRERAM FMHLTLVPYL AAAGEVKTKP TQHSVKELLS IGIQPDILVC RSDRMIPANE RKKIALFCNV QEKAVISMKD VDSIYKIPQL IRAQGLDDIV CARFGITAPE ADLSEWEQVI YEEANPTGEV TIGMVGKYIE LPDAYKSVNE ALKHAGLKNR LSVTIKYVDS QDVETKGVEV LEGLDAILVP GGFGDRGIEG KIRAAQYARE NNVPYLGICL GMQVALIEYA RNVAGMEGAH STEFNKETKY PVVGLITEWV DGEGKVEERT ETSNLGGTMR LGSQLCHLEK GTKARELYGN ATIHERHRHR YEVNNMLRPQ IEKAGLKVSG LSADKKLVEM IENPAHPWFV AAQFHPEFTS TPRDGHPLFA GFVKAAGEFS RGELK //