ID E7NXF1_TREPH Unreviewed; 535 AA.
AC E7NXF1;
DT 05-APR-2011, integrated into UniProtKB/TrEMBL.
DT 05-APR-2011, sequence version 1.
DT 24-JAN-2024, entry version 68.
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:EFW36768.1};
GN ORFNames=HMPREF9554_02770 {ECO:0000313|EMBL:EFW36768.1};
OS Treponema phagedenis F0421.
OC Bacteria; Spirochaetota; Spirochaetia; Spirochaetales; Treponemataceae;
OC Treponema.
OX NCBI_TaxID=754027 {ECO:0000313|EMBL:EFW36768.1, ECO:0000313|Proteomes:UP000004157};
RN [1] {ECO:0000313|EMBL:EFW36768.1, ECO:0000313|Proteomes:UP000004157}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=F0421 {ECO:0000313|EMBL:EFW36768.1,
RC ECO:0000313|Proteomes:UP000004157};
RA Weinstock G., Sodergren E., Clifton S., Fulton L., Fulton B., Courtney L.,
RA Fronick C., Harrison M., Strong C., Farmer C., Delahaunty K., Markovic C.,
RA Hall O., Minx P., Tomlinson C., Mitreva M., Hou S., Chen J., Wollam A.,
RA Pepin K.H., Johnson M., Bhonagiri V., Zhang X., Suruliraj S., Warren W.,
RA Chinwalla A., Mardis E.R., Wilson R.K.;
RL Submitted (SEP-2010) 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}.
CC -!- CAUTION: The sequence shown here is derived from an EMBL/GenBank/DDBJ
CC whole genome shotgun (WGS) entry which is preliminary data.
CC {ECO:0000313|EMBL:EFW36768.1}.
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DR EMBL; AEFH01000234; EFW36768.1; -; Genomic_DNA.
DR RefSeq; WP_002700801.1; NZ_GL638108.1.
DR AlphaFoldDB; E7NXF1; -.
DR STRING; 162.TPHV1_60031; -.
DR eggNOG; COG0504; Bacteria.
DR HOGENOM; CLU_011675_5_0_12; -.
DR UniPathway; UPA00159; UER00277.
DR Proteomes; UP000004157; Unassembled WGS sequence.
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}.
FT DOMAIN 4..267
FT /note="CTP synthase N-terminal"
FT /evidence="ECO:0000259|Pfam:PF06418"
FT DOMAIN 303..526
FT /note="Glutamine amidotransferase"
FT /evidence="ECO:0000259|Pfam:PF00117"
FT REGION 1..268
FT /note="Amidoligase domain"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT ACT_SITE 383
FT /note="Nucleophile"
FT /evidence="ECO:0000256|PROSITE-ProRule:PRU00605"
FT ACT_SITE 383
FT /note="Nucleophile; for glutamine hydrolysis"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT ACT_SITE 508
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227,
FT ECO:0000256|PROSITE-ProRule:PRU00605"
FT ACT_SITE 510
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227,
FT ECO:0000256|PROSITE-ProRule:PRU00605"
FT BINDING 14
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /ligand_note="allosteric inhibitor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 14
FT /ligand="UTP"
FT /ligand_id="ChEBI:CHEBI:46398"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 15..20
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 55
FT /ligand="L-glutamine"
FT /ligand_id="ChEBI:CHEBI:58359"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 72
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 72
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 142
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 149..151
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /ligand_note="allosteric inhibitor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 189..194
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /ligand_note="allosteric inhibitor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 189..194
FT /ligand="UTP"
FT /ligand_id="ChEBI:CHEBI:46398"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 225
FT /ligand="CTP"
FT /ligand_id="ChEBI:CHEBI:37563"
FT /ligand_note="allosteric inhibitor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 225
FT /ligand="UTP"
FT /ligand_id="ChEBI:CHEBI:46398"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 243
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 356
FT /ligand="L-glutamine"
FT /ligand_id="ChEBI:CHEBI:58359"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 384..387
FT /ligand="L-glutamine"
FT /ligand_id="ChEBI:CHEBI:58359"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 407
FT /ligand="L-glutamine"
FT /ligand_id="ChEBI:CHEBI:58359"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
FT BINDING 463
FT /ligand="L-glutamine"
FT /ligand_id="ChEBI:CHEBI:58359"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01227"
SQ SEQUENCE 535 AA; 60300 MW; 7DD9556C49C484C0 CRC64;
MNTKFIFITG GVVSSLGKGI TAASIGLLLK SRGLSVVNQK FDPYLNIDPG TMNPYQHGEV
FVTEDGGETD LDLGHYERFT DVAVRKFNST TAGKVYLAIL DRERNGEYDG GTVQVVPHVT
DEIQSRIMRA AEQTNPDIVI TEIGGTVGDI ESLPFIEAIR QIRYAVGKDR SVFIHLGLLP
YLKECGEIKT KPMQHSVKEL LGFGIQPDII MCRSEKKLTQ SVREKLSLFC NVDQDAIIEN
LTAKSIYEVP LMLEKAGLGK TICKLFHIED TKPELTDWEK MLYTFYHPEK EITVALVGKY
IELPDAYLSV SEALTAAGIY HKTNVKQIWI DAEKITSREE AEKQLKDVAA IIVPGGFGDR
GVEGMVFTAE YARTKKIPYF GICLGMQVAV IEFARHVLHL ENASSTEFQK HCEHPVIDLM
PDQQGVNLGG TLRLGLCTCS INQNTLTEQI YKQHEIRERH RHRYEFNNIY RTQFEESEMT
LAGINPERNL VEIIELKNHP WYVAVQFHPE FASRPNRPHP LFREFIGAAI KQAGV
//
