ID A0A0M2KDF9_9ENTR Unreviewed; 545 AA. AC A0A0M2KDF9; DT 11-NOV-2015, integrated into UniProtKB/TrEMBL. DT 11-NOV-2015, sequence version 1. DT 07-SEP-2016, entry version 9. DE RecName: Full=CTP synthase {ECO:0000256|HAMAP-Rule:MF_01227, ECO:0000256|SAAS:SAAS00037303}; DE EC=6.3.4.2 {ECO:0000256|HAMAP-Rule:MF_01227, ECO:0000256|SAAS:SAAS00037401}; 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 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; Enterobacteriales; OC Enterobacteriaceae; 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: ATP + UTP + L-glutamine = ADP + phosphate + CC CTP + L-glutamate. {ECO:0000256|HAMAP-Rule:MF_01227, CC ECO:0000256|SAAS:SAAS00037321}. CC -!- ENZYME REGULATION: Allosterically activated by GTP, when glutamine CC is the substrate; GTP has no effect on the reaction when ammonia CC is the substrate. The allosteric effector GTP functions by CC stabilizing the protein conformation that binds the tetrahedral CC intermediate(s) formed during glutamine hydrolysis. Inhibited by CC the product CTP, via allosteric rather than competitive CC inhibition. {ECO:0000256|HAMAP-Rule:MF_01227}. CC -!- PATHWAY: Pyrimidine metabolism; CTP biosynthesis via de novo CC pathway; CTP from UDP: step 2/2. {ECO:0000256|HAMAP-Rule:MF_01227, CC ECO:0000256|SAAS:SAAS00037318}. CC -!- SUBUNIT: Homotetramer. {ECO:0000256|HAMAP-Rule:MF_01227, CC ECO:0000256|SAAS:SAAS00356542}. CC -!- MISCELLANEOUS: CTPSs have evolved a hybrid strategy for CC distinguishing between UTP and CTP. The overlapping regions of the CC product feedback inhibitory and substrate sites recognize a common CC feature in both compounds, the triphosphate moiety. To CC differentiate isosteric substrate and product pyrimidine rings, an CC additional pocket far from the expected kinase/ligase catalytic CC site, specifically recognizes the cytosine and ribose portions of CC the product inhibitor. {ECO:0000256|HAMAP-Rule:MF_01227}. CC -!- SIMILARITY: Belongs to the CTP synthase family. CC {ECO:0000256|HAMAP-Rule:MF_01227, ECO:0000256|SAAS:SAAS00548960}. CC -!- SIMILARITY: Contains 1 glutamine amidotransferase type-1 domain. CC {ECO:0000256|HAMAP-Rule:MF_01227}. CC -!- CAUTION: The sequence shown here is derived from an CC EMBL/GenBank/DDBJ whole genome shotgun (WGS) entry which is CC preliminary data. {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 EnsemblBacteria; KKF35372; KKF35372; SY86_07995. 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-HAMAP. DR GO; GO:0044210; P:'de novo' CTP biosynthetic process; IEA:UniProtKB-UniPathway. DR GO; GO:0006541; P:glutamine metabolic process; IEA:UniProtKB-HAMAP. 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; 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. DR PROSITE; PS51273; GATASE_TYPE_1; 1. PE 3: Inferred from homology; KW ATP-binding {ECO:0000256|HAMAP-Rule:MF_01227, KW ECO:0000256|SAAS:SAAS00434461}; KW Complete proteome {ECO:0000313|Proteomes:UP000033924}; KW Glutamine amidotransferase {ECO:0000256|HAMAP-Rule:MF_01227, KW ECO:0000256|SAAS:SAAS00434680}; KW Ligase {ECO:0000256|HAMAP-Rule:MF_01227, KW ECO:0000256|SAAS:SAAS00434363, ECO:0000313|EMBL:KKF35372.1}; KW Magnesium {ECO:0000256|HAMAP-Rule:MF_01227, KW ECO:0000256|SAAS:SAAS00615993}; KW Metal-binding {ECO:0000256|HAMAP-Rule:MF_01227, KW ECO:0000256|SAAS:SAAS00615990}; KW Nucleotide-binding {ECO:0000256|HAMAP-Rule:MF_01227, KW ECO:0000256|SAAS:SAAS00434657}; KW Pyrimidine biosynthesis {ECO:0000256|HAMAP-Rule:MF_01227, KW ECO:0000256|SAAS:SAAS00434336}; KW Reference proteome {ECO:0000313|Proteomes:UP000033924}. FT DOMAIN 291 542 Glutamine amidotransferase type-1. FT {ECO:0000259|PROSITE:PS51273}. FT NP_BIND 15 20 ATP. {ECO:0000256|HAMAP-Rule:MF_01227}. FT NP_BIND 147 149 Allosteric inhibitor CTP. FT {ECO:0000256|HAMAP-Rule:MF_01227}. FT NP_BIND 187 192 Allosteric inhibitor CTP; alternate. FT {ECO:0000256|HAMAP-Rule:MF_01227}. FT NP_BIND 187 192 UTP; alternate. {ECO:0000256|HAMAP-Rule: FT MF_01227}. FT NP_BIND 239 241 ATP; via amide nitrogen. FT {ECO:0000256|HAMAP-Rule:MF_01227}. FT REGION 1 266 Amidoligase domain. {ECO:0000256|HAMAP- FT Rule:MF_01227}. FT REGION 380 383 L-glutamine binding. {ECO:0000256|HAMAP- FT Rule:MF_01227}. FT ACT_SITE 379 379 Nucleophile; for glutamine hydrolysis. FT {ECO:0000256|HAMAP-Rule:MF_01227}. FT ACT_SITE 515 515 {ECO:0000256|HAMAP-Rule:MF_01227}. FT ACT_SITE 517 517 {ECO:0000256|HAMAP-Rule:MF_01227}. FT METAL 72 72 Magnesium. {ECO:0000256|HAMAP-Rule: FT MF_01227}. FT METAL 140 140 Magnesium. {ECO:0000256|HAMAP-Rule: FT MF_01227}. FT BINDING 14 14 Allosteric inhibitor CTP; alternate. FT {ECO:0000256|HAMAP-Rule:MF_01227}. FT BINDING 14 14 UTP; alternate. {ECO:0000256|HAMAP-Rule: FT MF_01227}. FT BINDING 72 72 ATP. {ECO:0000256|HAMAP-Rule:MF_01227}. FT BINDING 223 223 Allosteric inhibitor CTP; alternate. FT {ECO:0000256|HAMAP-Rule:MF_01227}. FT BINDING 223 223 UTP; alternate. {ECO:0000256|HAMAP-Rule: FT MF_01227}. FT BINDING 352 352 L-glutamine; via carbonyl oxygen. FT {ECO:0000256|HAMAP-Rule:MF_01227}. FT BINDING 403 403 L-glutamine. {ECO:0000256|HAMAP-Rule: FT MF_01227}. FT BINDING 470 470 L-glutamine; via amide nitrogen. FT {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 //