ID A0A0M2KDF9_9GAMM Unreviewed; 545 AA. AC A0A0M2KDF9; DT 11-NOV-2015, integrated into UniProtKB/TrEMBL. DT 11-NOV-2015, sequence version 1. DT 03-AUG-2022, entry version 30. 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:KKF35372.1}; GN ORFNames=SY86_07995 {ECO:0000313|EMBL:KKF35372.1}; OS Erwinia tracheiphila. OC Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales; OC Erwiniaceae; Erwinia. OX NCBI_TaxID=65700 {ECO:0000313|EMBL:KKF35372.1, ECO:0000313|Proteomes:UP000033924}; RN [1] {ECO:0000313|EMBL:KKF35372.1, ECO:0000313|Proteomes:UP000033924} RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. RC STRAIN=BuffGH {ECO:0000313|EMBL:KKF35372.1, RC ECO:0000313|Proteomes:UP000033924}; RA Shapiro L.R.; RT "Erwinia tracheiphila."; RL Submitted (JAN-2015) to the EMBL/GenBank/DDBJ databases. 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 -!- CATALYTIC ACTIVITY: CC Reaction=ATP + NH4(+) + UTP = ADP + CTP + 2 H(+) + phosphate; 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:0000256|HAMAP- CC Rule:MF_01227}; CC -!- CATALYTIC ACTIVITY: CC Reaction=H2O + L-glutamine = L-glutamate + NH4(+); CC Xref=Rhea:RHEA:15889, ChEBI:CHEBI:15377, ChEBI:CHEBI:28938, CC ChEBI:CHEBI:29985, ChEBI:CHEBI:58359; Evidence={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:KKF35372.1}. 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; JXNU01000003; KKF35372.1; -; Genomic_DNA. DR RefSeq; WP_016190169.1; NZ_JXNU01000003.1. DR STRING; 65700.SY86_07995; -. DR EnsemblBacteria; KKF35372; KKF35372; SY86_07995. DR PATRIC; fig|65700.7.peg.2029; -. DR UniPathway; UPA00159; UER00277. DR Proteomes; UP000033924; Unassembled WGS sequence. 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 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}; Reference proteome {ECO:0000313|Proteomes:UP000033924}. FT DOMAIN 5..266 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 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 BINDING 14 FT /ligand="CTP" FT /ligand_id="ChEBI:CHEBI:37563" FT /ligand_note="allosteric inhibitor" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT BINDING 14 FT /ligand="UTP" FT /ligand_id="ChEBI:CHEBI:46398" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT BINDING 15..20 FT /ligand="ATP" FT /ligand_id="ChEBI:CHEBI:30616" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT BINDING 72 FT /ligand="ATP" FT /ligand_id="ChEBI:CHEBI:30616" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT BINDING 72 FT /ligand="Mg(2+)" FT /ligand_id="ChEBI:CHEBI:18420" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT BINDING 140 FT /ligand="Mg(2+)" FT /ligand_id="ChEBI:CHEBI:18420" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT BINDING 147..149 FT /ligand="CTP" FT /ligand_id="ChEBI:CHEBI:37563" FT /ligand_note="allosteric inhibitor" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT BINDING 187..192 FT /ligand="CTP" FT /ligand_id="ChEBI:CHEBI:37563" FT /ligand_note="allosteric inhibitor" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT BINDING 187..192 FT /ligand="UTP" FT /ligand_id="ChEBI:CHEBI:46398" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT BINDING 223 FT /ligand="CTP" FT /ligand_id="ChEBI:CHEBI:37563" FT /ligand_note="allosteric inhibitor" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT BINDING 223 FT /ligand="UTP" FT /ligand_id="ChEBI:CHEBI:46398" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT BINDING 239..241 FT /ligand="ATP" FT /ligand_id="ChEBI:CHEBI:30616" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT BINDING 352 FT /ligand="L-glutamine" FT /ligand_id="ChEBI:CHEBI:58359" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT BINDING 403 FT /ligand="L-glutamine" FT /ligand_id="ChEBI:CHEBI:58359" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" FT BINDING 470 FT /ligand="L-glutamine" FT /ligand_id="ChEBI:CHEBI:58359" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227" SQ SEQUENCE 545 AA; 60314 MW; B5F8AD701C1D9CC5 CRC64; MTTNYIFVTG GVVSSLGKGI AAASLAAILE ARGLNVTIMK LDPYINVDPG TMSPTQHGEV FVTDDGAETD LDLGHYERFI RTKMSRRNNF TTGRIYSEVL RKERRGDYLG ATVQVIPHIT NAIKERIIEG GEGNDVVLVE IGGTVGDIES LPFLEAIRQM AVDVGREHTM YMHLTLVPYM AAAGEVKTKP TQHSVKELLS IGIQPDVLIC RSDRAVPANE RAKIALFCNV PEKAVISLKD VDSIYKIPGL LNSQGLDDYI CKRFNLNAPE ANLAEWEQVI YEEANPGGEV TIGMVGKYVE LPDAYKSVIE ALKHGGLKNR VTVNIKLIDS QDVESRGVEL LKDLDAILIP GGFGYRGVEG KLMTARYARE NKVPFLGICL GMQVALMEFA RNVASMENAN STEFVPYCKY PVVALITEWR DEEGNVEVRT EKSDLGGTMR LGSQQCQLTS DSLVRQLYGS DIIVERHRHR YEVNNLLLKQ IEAAGLRVAG RSGDDQLVEI IEIPEHPWFV ACQFHPEFTS TPRDGHPLFA GFVKAANEHQ KRLAK //