ID I1XIX7_METNJ Unreviewed; 545 AA.
AC I1XIX7;
DT 11-JUL-2012, integrated into UniProtKB/TrEMBL.
DT 11-JUL-2012, sequence version 1.
DT 27-MAR-2024, entry version 70.
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:AUZ84419.1};
GN OrderedLocusNames=Q7A_1520 {ECO:0000313|EMBL:AFI84346.1};
GN ORFNames=CDW43_07410 {ECO:0000313|EMBL:AUZ84419.1};
OS Methylophaga nitratireducenticrescens.
OC Bacteria; Pseudomonadota; Gammaproteobacteria; Thiotrichales;
OC Piscirickettsiaceae; Methylophaga.
OX NCBI_TaxID=754476 {ECO:0000313|EMBL:AFI84346.1, ECO:0000313|Proteomes:UP000009144};
RN [1] {ECO:0000313|EMBL:AFI84346.1, ECO:0000313|Proteomes:UP000009144}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=JAM1 {ECO:0000313|EMBL:AFI84346.1,
RC ECO:0000313|Proteomes:UP000009144};
RX PubMed=22815445; DOI=10.1128/JB.00726-12;
RA Villeneuve C., Martineau C., Mauffrey F., Villemur R.;
RT "Complete genome sequences of Methylophaga sp. strain JAM1 and Methylophaga
RT sp. strain JAM7.";
RL J. Bacteriol. 194:4126-4127(2012).
RN [2] {ECO:0000313|EMBL:AFI84346.1}
RP NUCLEOTIDE SEQUENCE.
RC STRAIN=JAM1 {ECO:0000313|EMBL:AFI84346.1};
RX PubMed=23148104; DOI=10.1099/ijs.0.044545-0;
RA Villeneuve C., Martineau C., Mauffrey F., Villemur R.;
RT "Methylophaga nitratireducenticrescens sp. nov. and Methylophaga frappieri
RT sp. nov., isolated from the biofilm of the methanol-fed denitrification
RT system treating the seawater at the Montreal Biodome.";
RL Int. J. Syst. Evol. Microbiol. 63:2216-2222(2013).
RN [3] {ECO:0000313|EMBL:AFI84346.1}
RP NUCLEOTIDE SEQUENCE.
RC STRAIN=JAM1 {ECO:0000313|EMBL:AFI84346.1};
RA Villeneuve C., Villemur R.;
RL Submitted (JUN-2015) to the EMBL/GenBank/DDBJ databases.
RN [4] {ECO:0000313|EMBL:AUZ84419.1, ECO:0000313|Proteomes:UP000238402}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=GP59 {ECO:0000313|EMBL:AUZ84419.1,
RC ECO:0000313|Proteomes:UP000238402};
RA Villemur R.;
RT "The sequence of the genome of Methylophaga nitratireducenticrescens GP59
RT and its two plasmids.";
RL Submitted (JUN-2017) 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}.
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DR EMBL; CP003390; AFI84346.1; -; Genomic_DNA.
DR EMBL; CP021973; AUZ84419.1; -; Genomic_DNA.
DR RefSeq; WP_014706719.1; NZ_CP021973.1.
DR AlphaFoldDB; I1XIX7; -.
DR STRING; 754476.Q7A_1520; -.
DR MEROPS; C26.964; -.
DR KEGG; mej:Q7A_1520; -.
DR PATRIC; fig|754476.3.peg.1500; -.
DR eggNOG; COG0504; Bacteria.
DR HOGENOM; CLU_011675_5_0_6; -.
DR OrthoDB; 9801107at2; -.
DR UniPathway; UPA00159; UER00277.
DR Proteomes; UP000009144; Chromosome.
DR Proteomes; UP000238402; 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: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-UniRule.
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 {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}.
FT DOMAIN 3..265
FT /note="CTP synthase N-terminal"
FT /evidence="ECO:0000259|Pfam:PF06418"
FT DOMAIN 300..533
FT /note="Glutamine amidotransferase"
FT /evidence="ECO:0000259|Pfam:PF00117"
FT REGION 1..265
FT /note="Amidoligase domain"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT ACT_SITE 378
FT /note="Nucleophile"
FT /evidence="ECO:0000256|PROSITE-ProRule:PRU00605"
FT ACT_SITE 378
FT /note="Nucleophile; for glutamine hydrolysis"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT ACT_SITE 514
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227,
FT ECO:0000256|PROSITE-ProRule:PRU00605"
FT ACT_SITE 516
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227,
FT ECO:0000256|PROSITE-ProRule:PRU00605"
FT BINDING 13
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /ligand_note="allosteric inhibitor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 13
FT /ligand="UTP"
FT /ligand_id="ChEBI:CHEBI:46398"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 14..19
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 71
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 71
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 139
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 146..148
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /ligand_note="allosteric inhibitor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 186..191
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /ligand_note="allosteric inhibitor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 186..191
FT /ligand="UTP"
FT /ligand_id="ChEBI:CHEBI:46398"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 222
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /ligand_note="allosteric inhibitor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 222
FT /ligand="UTP"
FT /ligand_id="ChEBI:CHEBI:46398"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 240
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 351
FT /ligand="L-glutamine"
FT /ligand_id="ChEBI:CHEBI:58359"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 379..382
FT /ligand="L-glutamine"
FT /ligand_id="ChEBI:CHEBI:58359"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 402
FT /ligand="L-glutamine"
FT /ligand_id="ChEBI:CHEBI:58359"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 469
FT /ligand="L-glutamine"
FT /ligand_id="ChEBI:CHEBI:58359"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
SQ SEQUENCE 545 AA; 60451 MW; 3E4668F4248E84AD CRC64;
MTKFIFVTGG VVSSLGKGIA AASLAAILEA RGLKVTMIKL DPYINVDPGT MSPLQHGEVF
VTDDGAETDL DLGHYERFID ANMTSRNNHT TGQIYENVIR KERRGEYLGN TVQVIPHITD
EIKRCVYEGA GDADVALVEI GGTVGDIESL PFLETIRQMA TELGRDRALF IHLTLVPYIA
SAGEIKTKPT QHSVKELRTI GIQPDVLLCR MDRPLPESER RKISLFTNVP EKSVITCIDV
DSIYKIPMEL HKQGLDDIVV KQLGLDAKPA DLSQWQQVYE NLSNPQGEVN IAMVGKYMEL
TEAYKSLSEA LVHAGIHTRT KVNVHYVDSE MIEKNGTNSI ADMDAILVPG GFGKRGVEGM
ISTAQFAREN NIPYLGICLG MQVAVIEYAR HKAGLTQAFS TEFEPNTPDP VIGLITEWQK
EDGSVEQRDH DSDLGGTMRL GGYPCVLKPG SLAQQIYGTD EIVERHRHRY EFNNNYKQKL
EAAGMLFSGM SKDNSLAEMV EIPGHPWFVA CQFHPEFTST PRHGHRLFEG FINAAVSNHK
KRGQQ
//
