ID F8ACS5_THEID Unreviewed; 559 AA.
AC F8ACS5;
DT 21-SEP-2011, integrated into UniProtKB/TrEMBL.
DT 21-SEP-2011, sequence version 1.
DT 27-MAR-2024, entry version 75.
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 OrderedLocusNames=Thein_0839 {ECO:0000313|EMBL:AEH44716.1};
OS Thermodesulfatator indicus (strain DSM 15286 / JCM 11887 / CIR29812).
OC Bacteria; Thermodesulfobacteriota; Thermodesulfobacteria;
OC Thermodesulfobacteriales; Thermodesulfatatoraceae; Thermodesulfatator.
OX NCBI_TaxID=667014 {ECO:0000313|EMBL:AEH44716.1, ECO:0000313|Proteomes:UP000006793};
RN [1] {ECO:0000313|Proteomes:UP000006793}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 15286 / JCM 11887 / CIR29812
RC {ECO:0000313|Proteomes:UP000006793};
RA Lucas S., Copeland A., Lapidus A., Bruce D., Goodwin L., Pitluck S.,
RA Peters L., Kyrpides N., Mavromatis K., Pagani I., Ivanova N., Saunders L.,
RA Detter J.C., Tapia R., Han C., Land M., Hauser L., Markowitz V.,
RA Cheng J.-F., Hugenholtz P., Woyke T., Wu D., Spring S., Schroeder M.,
RA Brambilla E., Klenk H.-P., Eisen J.A.;
RT "The complete genome of Thermodesulfatator indicus DSM 15286.";
RL Submitted (APR-2011) to the EMBL/GenBank/DDBJ databases.
RN [2] {ECO:0000313|EMBL:AEH44716.1, ECO:0000313|Proteomes:UP000006793}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 15286 / JCM 11887 / CIR29812
RC {ECO:0000313|Proteomes:UP000006793};
RX PubMed=22768359; DOI=10.4056/sigs.2665915;
RA Anderson I., Saunders E., Lapidus A., Nolan M., Lucas S., Tice H.,
RA Del Rio T.G., Cheng J.F., Han C., Tapia R., Goodwin L.A., Pitluck S.,
RA Liolios K., Mavromatis K., Pagani I., Ivanova N., Mikhailova N., Pati A.,
RA Chen A., Palaniappan K., Land M., Hauser L., Jeffries C.D., Chang Y.J.,
RA Brambilla E.M., Rohde M., Spring S., Goker M., Detter J.C., Woyke T.,
RA Bristow J., Eisen J.A., Markowitz V., Hugenholtz P., Kyrpides N.C.,
RA Klenk H.P.;
RT "Complete genome sequence of the thermophilic sulfate-reducing ocean
RT bacterium Thermodesulfatator indicus type strain (CIR29812(T)).";
RL Stand. Genomic Sci. 6:155-164(2012).
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; CP002683; AEH44716.1; -; Genomic_DNA.
DR RefSeq; WP_013907460.1; NC_015681.1.
DR AlphaFoldDB; F8ACS5; -.
DR STRING; 667014.Thein_0839; -.
DR MEROPS; C26.964; -.
DR PaxDb; 667014-Thein_0839; -.
DR KEGG; tid:Thein_0839; -.
DR PATRIC; fig|667014.3.peg.862; -.
DR eggNOG; COG0504; Bacteria.
DR HOGENOM; CLU_011675_5_0_0; -.
DR InParanoid; F8ACS5; -.
DR OrthoDB; 9801107at2; -.
DR UniPathway; UPA00159; UER00277.
DR Proteomes; UP000006793; 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-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}; Reference proteome {ECO:0000313|Proteomes:UP000006793}.
FT DOMAIN 10..273
FT /note="CTP synthase N-terminal"
FT /evidence="ECO:0000259|Pfam:PF06418"
FT DOMAIN 308..545
FT /note="Glutamine amidotransferase"
FT /evidence="ECO:0000259|Pfam:PF00117"
FT REGION 1..273
FT /note="Amidoligase domain"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT ACT_SITE 387
FT /note="Nucleophile"
FT /evidence="ECO:0000256|PROSITE-ProRule:PRU00605"
FT ACT_SITE 387
FT /note="Nucleophile; for glutamine hydrolysis"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT ACT_SITE 526
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227,
FT ECO:0000256|PROSITE-ProRule:PRU00605"
FT ACT_SITE 528
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227,
FT ECO:0000256|PROSITE-ProRule:PRU00605"
FT BINDING 20
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /ligand_note="allosteric inhibitor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 20
FT /ligand="UTP"
FT /ligand_id="ChEBI:CHEBI:46398"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 21..26
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 78
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 78
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 147
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 154..156
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /ligand_note="allosteric inhibitor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 194..199
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /ligand_note="allosteric inhibitor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 194..199
FT /ligand="UTP"
FT /ligand_id="ChEBI:CHEBI:46398"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 230
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /ligand_note="allosteric inhibitor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 230
FT /ligand="UTP"
FT /ligand_id="ChEBI:CHEBI:46398"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 246..248
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 360
FT /ligand="L-glutamine"
FT /ligand_id="ChEBI:CHEBI:58359"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 388..391
FT /ligand="L-glutamine"
FT /ligand_id="ChEBI:CHEBI:58359"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 411
FT /ligand="L-glutamine"
FT /ligand_id="ChEBI:CHEBI:58359"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 479
FT /ligand="L-glutamine"
FT /ligand_id="ChEBI:CHEBI:58359"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
SQ SEQUENCE 559 AA; 63105 MW; 8085CC817B377F9B CRC64;
MGRKHKLHTK FIFVTGGVLS SLGKGLAAAA IGTLLEARGL SITLQKLDPY INVDPGTMNP
FQHGEVYVTD DGAETDLDLG HYERFTSAKM SQKNNFTSGK IYYSVIMKER RGDYLGGTVQ
IIPHITDEIK ASILQLAGND VDIAIVEIGG TVGDIEGLPF LEAIRQLRYD LGRENTLYIH
LTYVPYIKTA GELKTKPTQH SVKELRAIGI QPDILLCRTE KFLPQEVKRK IALFCNVDED
AVITAKDVEC IYEIPLIFHK EKLDEKIIDL LNIWTREPRL TAWEELVYRL KNPKHEVTIA
VVGKYVHLKD SYKSLHEALV HGGIPSRTKV NIRYIDSEEI TPENIGELLD GVHAVLVPGG
FGSRGVEGKI QAIKFARENK IPFFGICLGM QLAVIEFARH VAGLKGADST EFNTDTPYPV
IYLMREWFNF RTQKVEVRDE TTEKGGTMRL GAYPCRLIDG TLAKEAYKQD EIFERHRHRY
EFNNEYRDIL TEKGLVVSGV SPDNELVEII ELPKDEHPWF LGCQFHPEFK SKPMAPHPLF
VAFVNAALEK SQKIDEKAA
//
