ID   A0A2Z5JWN4_9ACTN        Unreviewed;       552 AA.
AC   A0A2Z5JWN4;
DT   10-OCT-2018, integrated into UniProtKB/TrEMBL.
DT   10-OCT-2018, sequence version 1.
DT   24-JAN-2024, entry version 19.
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:AXE84861.1};
GN   ORFNames=C1703_07625 {ECO:0000313|EMBL:AXE84861.1};
OS   Streptomyces sp. Go-475.
OC   Bacteria; Actinomycetota; Actinomycetes; Kitasatosporales;
OC   Streptomycetaceae; Streptomyces.
OX   NCBI_TaxID=2072505 {ECO:0000313|EMBL:AXE84861.1, ECO:0000313|Proteomes:UP000253251};
RN   [1] {ECO:0000313|EMBL:AXE84861.1}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Go-475 {ECO:0000313|EMBL:AXE84861.1};
RX   PubMed=29946312; DOI=10.3389/fmicb.2018.01270;
RA   Kibret M., Guerrero-Garzon J.F., Urban E., Zehl M., Wronski V.K.,
RA   Ruckert C., Busche T., Kalinowski J., Rollinger J.M., Abate D.,
RA   Zotchev S.B.;
RT   "Streptomyces spp. From Ethiopia Producing Antimicrobial Compounds:
RT   Characterization via Bioassays, Genome Analyses, and Mass Spectrometry.";
RL   Front. Microbiol. 9:1270-1270(2018).
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; CP026121; AXE84861.1; -; Genomic_DNA.
DR   AlphaFoldDB; A0A2Z5JWN4; -.
DR   OrthoDB; 9801107at2; -.
DR   UniPathway; UPA00159; UER00277.
DR   Proteomes; UP000253251; 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:UP000253251}.
FT   DOMAIN          12..275
FT                   /note="CTP synthase N-terminal"
FT                   /evidence="ECO:0000259|Pfam:PF06418"
FT   DOMAIN          310..543
FT                   /note="Glutamine amidotransferase"
FT                   /evidence="ECO:0000259|Pfam:PF00117"
FT   REGION          1..275
FT                   /note="Amidoligase domain"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT   ACT_SITE        390
FT                   /note="Nucleophile"
FT                   /evidence="ECO:0000256|PROSITE-ProRule:PRU00605"
FT   ACT_SITE        390
FT                   /note="Nucleophile; for glutamine hydrolysis"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT   ACT_SITE        524
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01227,
FT                   ECO:0000256|PROSITE-ProRule:PRU00605"
FT   ACT_SITE        526
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01227,
FT                   ECO:0000256|PROSITE-ProRule:PRU00605"
FT   BINDING         22
FT                   /ligand="CTP"
FT                   /ligand_id="ChEBI:CHEBI:37563"
FT                   /ligand_note="allosteric inhibitor"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT   BINDING         22
FT                   /ligand="UTP"
FT                   /ligand_id="ChEBI:CHEBI:46398"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT   BINDING         23..28
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT   BINDING         80
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT   BINDING         80
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT   BINDING         149
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT   BINDING         156..158
FT                   /ligand="CTP"
FT                   /ligand_id="ChEBI:CHEBI:37563"
FT                   /ligand_note="allosteric inhibitor"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT   BINDING         196..201
FT                   /ligand="CTP"
FT                   /ligand_id="ChEBI:CHEBI:37563"
FT                   /ligand_note="allosteric inhibitor"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT   BINDING         196..201
FT                   /ligand="UTP"
FT                   /ligand_id="ChEBI:CHEBI:46398"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT   BINDING         232
FT                   /ligand="CTP"
FT                   /ligand_id="ChEBI:CHEBI:37563"
FT                   /ligand_note="allosteric inhibitor"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT   BINDING         232
FT                   /ligand="UTP"
FT                   /ligand_id="ChEBI:CHEBI:46398"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT   BINDING         250
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT   BINDING         363
FT                   /ligand="L-glutamine"
FT                   /ligand_id="ChEBI:CHEBI:58359"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT   BINDING         391..394
FT                   /ligand="L-glutamine"
FT                   /ligand_id="ChEBI:CHEBI:58359"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT   BINDING         414
FT                   /ligand="L-glutamine"
FT                   /ligand_id="ChEBI:CHEBI:58359"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT   BINDING         476
FT                   /ligand="L-glutamine"
FT                   /ligand_id="ChEBI:CHEBI:58359"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
SQ   SEQUENCE   552 AA;  60457 MW;  57320F900530D6D6 CRC64;
     MPPAAFRNST TKHIFVTGGV ASSLGKGLTA SSLGMLLKAR GLRVVMQKLD PYLNVDPGTM
     NPFQHGEVFV TNDGAETDLD IGHYERFLDR DLDGSANVTT GQVYSTVIAK ERRGEYLGDT
     VQVIPHITNE IKHRIRRMAT DEVDVVITEV GGTVGDIESL PFLETVRQVR HEVGRDNVFV
     VHISLLPYIG PSGELKTKPT QHSVAALRNI GIQPDAIVLR CDREVPTAIK RKISLMCDVD
     EAAVVACPDA RSIYDIPKTV HGEGLDAYVV RKLDLPFRDV DWTTWDDLLD RVHNPDHEVT
     LALVGKYIDL PDAYLSVTEA LRAGGFANRA RVKIKWVTSD DCKTPAGAAA QLGDVDGICI
     PGGFGDRGVL GKVGAIKYAR ENKIPLLGLC LGLQCIVIEA ARNLADISDA NSTEFDPATA
     HPVISTMAEQ LDIVAGEGDM GGTMRLGMYP AKLAEGSIVR EVYDGKEYVE ERHRHRYEVN
     NAYRAELEKR AGILFSGTSP DGKLVEYVEY PRDVHPYLVA TQAHPELRSR PTRPHPLFAG
     LVKAAVERKT SK
//