PYRG_ALBFT
ID PYRG_ALBFT Reviewed; 555 AA.
AC Q21V39;
DT 12-DEC-2006, integrated into UniProtKB/Swiss-Prot.
DT 18-APR-2006, sequence version 1.
DT 03-AUG-2022, entry version 97.
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=Rfer_2648;
OS Albidiferax ferrireducens (strain ATCC BAA-621 / DSM 15236 / T118)
OS (Rhodoferax ferrireducens).
OC Bacteria; Proteobacteria; Betaproteobacteria; Burkholderiales;
OC Comamonadaceae; Rhodoferax.
OX NCBI_TaxID=338969;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC BAA-621 / DSM 15236 / T118;
RA Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C.,
RA Glavina del Rio T., Hammon N., Israni S., Pitluck S., Brettin T., Bruce D.,
RA Han C., Tapia R., Gilna P., Kiss H., Schmutz J., Larimer F., Land M.,
RA Kyrpides N., Ivanova N., Richardson P.;
RT "Complete sequence of chromosome of Rhodoferax ferrireducens DSM 15236.";
RL Submitted (FEB-2006) 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: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; CP000267; ABD70364.1; -; Genomic_DNA.
DR RefSeq; WP_011464932.1; NC_007908.1.
DR AlphaFoldDB; Q21V39; -.
DR SMR; Q21V39; -.
DR STRING; 338969.Rfer_2648; -.
DR EnsemblBacteria; ABD70364; ABD70364; Rfer_2648.
DR KEGG; rfr:Rfer_2648; -.
DR eggNOG; COG0504; Bacteria.
DR HOGENOM; CLU_011675_5_0_4; -.
DR OMA; EFNNAYR; -.
DR OrthoDB; 783657at2; -.
DR UniPathway; UPA00159; UER00277.
DR Proteomes; UP000008332; 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; 3.40.50.300; -; 1.
DR Gene3D; 3.40.50.880; -; 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 PANTHER; PTHR11550; PTHR11550; 1.
DR Pfam; PF06418; CTP_synth_N; 1.
DR Pfam; PF00117; GATase; 1.
DR SUPFAM; SSF52317; SSF52317; 1.
DR SUPFAM; SSF52540; SSF52540; 1.
DR TIGRFAMs; TIGR00337; PyrG; 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..555
FT /note="CTP synthase"
FT /id="PRO_0000266197"
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 555 AA; 61237 MW; 5E4D73A35DF4AABD CRC64;
MTKFVFVTGG VVSSLGKGIA SASLAAILES RGLKVTLIKL DPYLNVDPGT MSPFQHGEVF
VTNDGAETDL DLGHYERFVE TRMRKANNFT TGQIYKSVLE KERRGDYLGK TVQVIPHVTN
EIQDFVKRGA GWGTPDAVDV AIVEIGGTVG DIESLPFLEA VRQMSLKLGP NNSAFVHLSY
VPWIAAAGEL KTKPTQHTAK QLREIGIQAD ALLCRADRPI PKEEREKISL FSNVPDWAVI
SMWDVDTIYK VPRMLHEQGL DGLICDKLRL STPPANLKRW DDLVYETAHP QGDVNIVMVG
KYVELSDSYK SLNEAIRHAG MKNHVRVKID YIDSETITPD NVTQLAKFDA ILVPGGFGIR
GVEGKICAAR FARENKVPYL GICLGMQVAT IEFARHVAGL KDANSTEFDP SSPNPVIALI
TEWKDADGSI KTRDENSDLG GTMRLGAQSS DVVKGTLAHK IYGDVVTERH RHRYEANVHF
LDTLRKAGLV ISAFTQREHL TEIVELPQSV HPWFMGVQFH PEFNSTPWAG HPLFIAFIKA
ALDHQAAGKA LKAVA
