ID PYRG_CUPMC Reviewed; 549 AA.
AC Q1LPI8;
DT 12-DEC-2006, integrated into UniProtKB/Swiss-Prot.
DT 30-MAY-2006, sequence version 1.
DT 27-MAR-2024, entry version 101.
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}; OrderedLocusNames=Rmet_1052;
OS Cupriavidus metallidurans (strain ATCC 43123 / DSM 2839 / NBRC 102507 /
OS CH34) (Ralstonia metallidurans).
OC Bacteria; Pseudomonadota; Betaproteobacteria; Burkholderiales;
OC Burkholderiaceae; Cupriavidus.
OX NCBI_TaxID=266264;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 43123 / DSM 2839 / NBRC 102507 / CH34;
RX PubMed=20463976; DOI=10.1371/journal.pone.0010433;
RA Janssen P.J., Van Houdt R., Moors H., Monsieurs P., Morin N., Michaux A.,
RA Benotmane M.A., Leys N., Vallaeys T., Lapidus A., Monchy S., Medigue C.,
RA Taghavi S., McCorkle S., Dunn J., van der Lelie D., Mergeay M.;
RT "The complete genome sequence of Cupriavidus metallidurans strain CH34, a
RT master survivalist in harsh and anthropogenic environments.";
RL PLoS ONE 5:E10433-E10433(2010).
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=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:0000255|HAMAP-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:0000255|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: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}.
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DR EMBL; CP000352; ABF07938.1; -; Genomic_DNA.
DR RefSeq; WP_011515844.1; NC_007973.1.
DR AlphaFoldDB; Q1LPI8; -.
DR SMR; Q1LPI8; -.
DR STRING; 266264.Rmet_1052; -.
DR MEROPS; C26.964; -.
DR KEGG; rme:Rmet_1052; -.
DR eggNOG; COG0504; Bacteria.
DR HOGENOM; CLU_011675_5_0_4; -.
DR UniPathway; UPA00159; UER00277.
DR Proteomes; UP000002429; Chromosome.
DR GO; GO:0005524; F:ATP binding; IEA:UniProtKB-KW.
DR GO; GO:0003883; F:CTP synthase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0004359; F:glutaminase activity; IEA:RHEA.
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; 3.40.50.880; -; 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; 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..549
FT /note="CTP synthase"
FT /id="PRO_0000266192"
FT DOMAIN 295..547
FT /note="Glutamine amidotransferase type-1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227"
FT REGION 1..270
FT /note="Amidoligase domain"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227"
FT ACT_SITE 383
FT /note="Nucleophile; for glutamine hydrolysis"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227"
FT ACT_SITE 520
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227"
FT ACT_SITE 522
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227"
FT BINDING 13
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /ligand_note="allosteric inhibitor"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227"
FT BINDING 13
FT /ligand="UTP"
FT /ligand_id="ChEBI:CHEBI:46398"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227"
FT BINDING 14..19
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227"
FT BINDING 71
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227"
FT BINDING 71
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227"
FT BINDING 144
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227"
FT BINDING 151..153
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /ligand_note="allosteric inhibitor"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227"
FT BINDING 191..196
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /ligand_note="allosteric inhibitor"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227"
FT BINDING 191..196
FT /ligand="UTP"
FT /ligand_id="ChEBI:CHEBI:46398"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227"
FT BINDING 227
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /ligand_note="allosteric inhibitor"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227"
FT BINDING 227
FT /ligand="UTP"
FT /ligand_id="ChEBI:CHEBI:46398"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227"
FT BINDING 356
FT /ligand="L-glutamine"
FT /ligand_id="ChEBI:CHEBI:58359"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227"
FT BINDING 384..387
FT /ligand="L-glutamine"
FT /ligand_id="ChEBI:CHEBI:58359"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227"
FT BINDING 407
FT /ligand="L-glutamine"
FT /ligand_id="ChEBI:CHEBI:58359"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227"
FT BINDING 473
FT /ligand="L-glutamine"
FT /ligand_id="ChEBI:CHEBI:58359"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01227"
SQ SEQUENCE 549 AA; 60704 MW; 395145B2147557F9 CRC64;
MTKFVFVTGG VVSSLGKGIA AASLAAILES RGLKVTLLKL DPYINVDPGT MSPFQHGEVF
VTEDGAETDL DLGHYERFVS AKMRKSNNFT TGQIYESVIR KERRGEYLGK TVQVIPHITN
EIQAFVERGA AASHDGKADV ALVEIGGTVG DIESLPFLEA ARQMSLRLGR NHCAFVHLTL
VPFIASAGEL KTKPTQHSVQ KLREIGISPT ALLCRADRPI PDDERAKISL FANIPQEAVI
SVWDADSIYK IPQMLNEQGL DRLICEELRL DPKPADLSMW QKLVKAQENP EHEITIGMVG
KYVDLTESYK SLIEALRHAG MHTATRVNIE YIDSEELESG HLEVLQPLDA ILVPGGFGKR
GTEGKIRAIQ YARENKVPYL GICLGMQLAV IEFARHVASM GDANSTEFNL DTEHPVVALI
TEWVDRDGKV EQRSADSDLG GTMRLGAQRV PIKTGTKASQ IYGAEVNERH RHRYEVNNHY
VPELEKAGMV ISARTPTENL PEMMELPESM HPWFVGVQFH PEFTSTPRDG HPLFKAYVEA
ALAAQRQGA
//
