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Database: UniProt
Entry: K4IE55_PSYTT
LinkDB: K4IE55_PSYTT
Original site: K4IE55_PSYTT 
ID   K4IE55_PSYTT            Unreviewed;       386 AA.
AC   K4IE55;
DT   09-JAN-2013, integrated into UniProtKB/TrEMBL.
DT   09-JAN-2013, sequence version 1.
DT   24-JAN-2024, entry version 63.
DE   RecName: Full=N5-carboxyaminoimidazole ribonucleotide synthase {ECO:0000256|HAMAP-Rule:MF_01928, ECO:0000256|RuleBase:RU361200};
DE            Short=N5-CAIR synthase {ECO:0000256|HAMAP-Rule:MF_01928, ECO:0000256|RuleBase:RU361200};
DE            EC=6.3.4.18 {ECO:0000256|HAMAP-Rule:MF_01928, ECO:0000256|RuleBase:RU361200};
DE   AltName: Full=5-(carboxyamino)imidazole ribonucleotide synthetase {ECO:0000256|HAMAP-Rule:MF_01928, ECO:0000256|RuleBase:RU361200};
GN   Name=purK {ECO:0000256|HAMAP-Rule:MF_01928,
GN   ECO:0000256|RuleBase:RU361200};
GN   OrderedLocusNames=P700755_000350 {ECO:0000313|EMBL:AFU67381.1};
OS   Psychroflexus torquis (strain ATCC 700755 / ACAM 623).
OC   Bacteria; Bacteroidota; Flavobacteriia; Flavobacteriales;
OC   Flavobacteriaceae; Psychroflexus.
OX   NCBI_TaxID=313595 {ECO:0000313|EMBL:AFU67381.1, ECO:0000313|Proteomes:UP000008514};
RN   [1] {ECO:0000313|EMBL:AFU67381.1, ECO:0000313|Proteomes:UP000008514}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 700755 / ACAM 623 {ECO:0000313|Proteomes:UP000008514};
RA   Bowman J., Ferriera S., Johnson J., Kravitz S., Halpern A., Remington K.,
RA   Beeson K., Tran B., Rogers Y.-H., Friedman R., Venter J.C.;
RL   Submitted (MAR-2006) to the EMBL/GenBank/DDBJ databases.
RN   [2] {ECO:0000313|EMBL:AFU67381.1, ECO:0000313|Proteomes:UP000008514}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 700755 / ACAM 623 {ECO:0000313|Proteomes:UP000008514};
RA   Feng S., Powell S.M., Bowman J.P.;
RT   "The complete sequence of Psychroflexus torquis an extreme psychrophile
RT   from sea-ice that is stimulated by light.";
RL   Submitted (SEP-2012) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Catalyzes the ATP-dependent conversion of 5-aminoimidazole
CC       ribonucleotide (AIR) and HCO(3)(-) to N5-carboxyaminoimidazole
CC       ribonucleotide (N5-CAIR). {ECO:0000256|HAMAP-Rule:MF_01928}.
CC   -!- FUNCTION: Catalyzes the ATP-dependent conversion of 5-aminoimidazole
CC       ribonucleotide (AIR) and HCO(3)- to N5-carboxyaminoimidazole
CC       ribonucleotide (N5-CAIR). {ECO:0000256|RuleBase:RU361200}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=5-amino-1-(5-phospho-beta-D-ribosyl)imidazole + ATP +
CC         hydrogencarbonate = 5-carboxyamino-1-(5-phospho-D-ribosyl)imidazole +
CC         ADP + 2 H(+) + phosphate; Xref=Rhea:RHEA:19317, ChEBI:CHEBI:15378,
CC         ChEBI:CHEBI:17544, ChEBI:CHEBI:30616, ChEBI:CHEBI:43474,
CC         ChEBI:CHEBI:58730, ChEBI:CHEBI:137981, ChEBI:CHEBI:456216;
CC         EC=6.3.4.18; Evidence={ECO:0000256|HAMAP-Rule:MF_01928,
CC         ECO:0000256|RuleBase:RU361200};
CC   -!- PATHWAY: Purine metabolism; IMP biosynthesis via de novo pathway; 5-
CC       amino-1-(5-phospho-D-ribosyl)imidazole-4-carboxylate from 5-amino-1-(5-
CC       phospho-D-ribosyl)imidazole (N5-CAIR route): step 1/2.
CC       {ECO:0000256|HAMAP-Rule:MF_01928, ECO:0000256|RuleBase:RU361200}.
CC   -!- SUBUNIT: Homodimer. {ECO:0000256|HAMAP-Rule:MF_01928,
CC       ECO:0000256|RuleBase:RU361200}.
CC   -!- SIMILARITY: Belongs to the PurK/PurT family. {ECO:0000256|HAMAP-
CC       Rule:MF_01928, ECO:0000256|RuleBase:RU361200}.
CC   -!- CAUTION: Lacks conserved residue(s) required for the propagation of
CC       feature annotation. {ECO:0000256|HAMAP-Rule:MF_01928}.
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DR   EMBL; CP003879; AFU67381.1; -; Genomic_DNA.
DR   RefSeq; WP_015022999.1; NC_018721.1.
DR   AlphaFoldDB; K4IE55; -.
DR   STRING; 313595.P700755_000350; -.
DR   KEGG; ptq:P700755_000350; -.
DR   eggNOG; COG0026; Bacteria.
DR   HOGENOM; CLU_011534_0_2_10; -.
DR   OMA; ITFDHEH; -.
DR   OrthoDB; 9804625at2; -.
DR   UniPathway; UPA00074; UER00942.
DR   Proteomes; UP000008514; Chromosome.
DR   GO; GO:0034028; F:5-(carboxyamino)imidazole ribonucleotide synthase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0046872; F:metal ion binding; IEA:InterPro.
DR   GO; GO:0004638; F:phosphoribosylaminoimidazole carboxylase activity; IEA:InterPro.
DR   GO; GO:0006189; P:'de novo' IMP biosynthetic process; IEA:UniProtKB-UniRule.
DR   Gene3D; 3.40.50.20; -; 1.
DR   Gene3D; 3.30.1490.20; ATP-grasp fold, A domain; 1.
DR   Gene3D; 3.30.470.20; ATP-grasp fold, B domain; 1.
DR   HAMAP; MF_01928; PurK; 1.
DR   InterPro; IPR011761; ATP-grasp.
DR   InterPro; IPR003135; ATP-grasp_carboxylate-amine.
DR   InterPro; IPR013815; ATP_grasp_subdomain_1.
DR   InterPro; IPR016185; PreATP-grasp_dom_sf.
DR   InterPro; IPR005875; PurK.
DR   InterPro; IPR040686; PurK_C.
DR   InterPro; IPR011054; Rudment_hybrid_motif.
DR   NCBIfam; TIGR01161; purK; 1.
DR   PANTHER; PTHR11609:SF5; PHOSPHORIBOSYLAMINOIMIDAZOLE CARBOXYLASE; 1.
DR   PANTHER; PTHR11609; PURINE BIOSYNTHESIS PROTEIN 6/7, PUR6/7; 1.
DR   Pfam; PF02222; ATP-grasp; 1.
DR   Pfam; PF17769; PurK_C; 1.
DR   SUPFAM; SSF56059; Glutathione synthetase ATP-binding domain-like; 1.
DR   SUPFAM; SSF52440; PreATP-grasp domain; 1.
DR   SUPFAM; SSF51246; Rudiment single hybrid motif; 1.
DR   PROSITE; PS50975; ATP_GRASP; 1.
PE   3: Inferred from homology;
KW   ATP-binding {ECO:0000256|ARBA:ARBA00022840, ECO:0000256|HAMAP-
KW   Rule:MF_01928};
KW   Ligase {ECO:0000256|HAMAP-Rule:MF_01928, ECO:0000256|RuleBase:RU361200};
KW   Nucleotide-binding {ECO:0000256|HAMAP-Rule:MF_01928, ECO:0000256|PROSITE-
KW   ProRule:PRU00409};
KW   Purine biosynthesis {ECO:0000256|ARBA:ARBA00022755, ECO:0000256|HAMAP-
KW   Rule:MF_01928}.
FT   DOMAIN          112..298
FT                   /note="ATP-grasp"
FT                   /evidence="ECO:0000259|PROSITE:PS50975"
FT   BINDING         108
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01928"
FT   BINDING         150
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01928"
FT   BINDING         181..184
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01928"
FT   BINDING         189
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01928"
FT   BINDING         268..269
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01928"
SQ   SEQUENCE   386 AA;  43233 MW;  2B897E1197B8E00D CRC64;
     MTHYFSSDFK LGILGGGQLG KMMLYDTRKL DIQTYVMDPN PEAPSKIACN HFETGDLMDY
     DRVMEFGKQV DVLTFEIEFV NVKALEDLEA SGVKVYPSAA TLNKIQNKSV QKEFYKANQI
     PTADFTTYPS LEALKKDVSE GKVKFPFVWK SSTGGYDGKG VSVIKSEKNL EALPNGECLT
     EELVDFKTEI AIIVARNVSG NIKTYPVVEM EFNPDTNQVE YVLCPARIEP SIAEKARNLA
     QLVSNRFEHV GLLAIEMFLT QDDDIIVNEV APRPHNSGHF SIEGSYTNQF EQHLRAILDL
     PLGETSSKTN SVMVNLVGEE NHTGDVVYQG IQTIMDMPGV IPHIYGKKQT RPFRKMGHVN
     IIHSDIKEAR KIAEHVKSTI KVISKH
//
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