ID   A6UT73_META3            Unreviewed;       156 AA.
AC   A6UT73;
DT   21-AUG-2007, integrated into UniProtKB/TrEMBL.
DT   21-AUG-2007, sequence version 1.
DT   04-NOV-2026, entry version 91.
DE   RecName: Full=N5-carboxyaminoimidazole ribonucleotide mutase {ECO:0000256|HAMAP-Rule:MF_01929, ECO:0000256|PIRNR:PIRNR001338};
DE            Short=N5-CAIR mutase {ECO:0000256|HAMAP-Rule:MF_01929, ECO:0000256|PIRNR:PIRNR001338};
DE            EC=5.4.99.18 {ECO:0000256|HAMAP-Rule:MF_01929, ECO:0000256|PIRNR:PIRNR001338};
DE   AltName: Full=5-(carboxyamino)imidazole ribonucleotide mutase {ECO:0000256|HAMAP-Rule:MF_01929};
GN   Name=purE {ECO:0000256|HAMAP-Rule:MF_01929};
GN   OrderedLocusNames=Maeo_0103 {ECO:0000313|EMBL:ABR55695.1};
OS   Methanococcus aeolicus (strain ATCC BAA-1280 / DSM 17508 / OCM 812 /
OS   Nankai-3).
OC   Archaea; Methanobacteriati; Methanobacteriota; Methanomada group;
OC   Methanococci; Methanococcales; Methanococcaceae; Methanococcus.
OX   NCBI_TaxID=419665 {ECO:0000313|EMBL:ABR55695.1, ECO:0000313|Proteomes:UP000001106};
RN   [1] {ECO:0000313|EMBL:ABR55695.1}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Nankai-3 {ECO:0000313|EMBL:ABR55695.1};
RG   US DOE Joint Genome Institute;
RA   Copeland A., Lucas S., Lapidus A., Barry K., Glavina del Rio T., Dalin E.,
RA   Tice H., Pitluck S., Chain P., Malfatti S., Shin M., Vergez L., Schmutz J.,
RA   Larimer F., Land M., Hauser L., Kyrpides N., Lykidis A.,
RA   Sieprawska-Lupa M., Whitman W.B., Richardson P.;
RT   "Complete sequence of Methanococcus aeolicus Nankai-3.";
RL   Submitted (JUN-2007) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Catalyzes the conversion of N5-carboxyaminoimidazole
CC       ribonucleotide (N5-CAIR) to 4-carboxy-5-aminoimidazole ribonucleotide
CC       (CAIR). {ECO:0000256|HAMAP-Rule:MF_01929,
CC       ECO:0000256|PIRNR:PIRNR001338}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=5-carboxyamino-1-(5-phospho-D-ribosyl)imidazole + H(+) = 5-
CC         amino-1-(5-phospho-D-ribosyl)imidazole-4-carboxylate;
CC         Xref=Rhea:RHEA:13193, ChEBI:CHEBI:15378, ChEBI:CHEBI:58730,
CC         ChEBI:CHEBI:77657; EC=5.4.99.18; Evidence={ECO:0000256|HAMAP-
CC         Rule:MF_01929, ECO:0000256|PIRNR:PIRNR001338};
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 2/2.
CC       {ECO:0000256|HAMAP-Rule:MF_01929, ECO:0000256|PIRNR:PIRNR001338}.
CC   -!- SIMILARITY: Belongs to the AIR carboxylase family. Class I subfamily.
CC       {ECO:0000256|HAMAP-Rule:MF_01929}.
CC   ---------------------------------------------------------------------------
CC   Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC   Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC   ---------------------------------------------------------------------------
DR   EMBL; CP000743; ABR55695.1; -; Genomic_DNA.
DR   RefSeq; WP_011972827.1; NC_009635.1.
DR   AlphaFoldDB; A6UT73; -.
DR   STRING; 419665.Maeo_0103; -.
DR   GeneID; 5327311; -.
DR   KEGG; mae:Maeo_0103; -.
DR   eggNOG; arCOG02464; Archaea.
DR   HOGENOM; CLU_094982_2_2_2; -.
DR   OMA; AAMIAYQ; -.
DR   OrthoDB; 9473at2157; -.
DR   UniPathway; UPA00074; UER00943.
DR   Proteomes; UP000001106; Chromosome.
DR   GO; GO:0034023; F:5-(carboxyamino)imidazole ribonucleotide mutase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0006189; P:'de novo' IMP biosynthetic process; IEA:UniProtKB-UniRule.
DR   Gene3D; 3.40.50.1970; -; 1.
DR   HAMAP; MF_01929; PurE_classI; 1.
DR   InterPro; IPR033747; PurE_ClassI.
DR   InterPro; IPR000031; PurE_dom.
DR   InterPro; IPR024694; PurE_prokaryotes.
DR   NCBIfam; TIGR01162; purE; 1.
DR   PANTHER; PTHR23046:SF2; PHOSPHORIBOSYLAMINOIMIDAZOLE CARBOXYLASE; 1.
DR   PANTHER; PTHR23046; PHOSPHORIBOSYLAMINOIMIDAZOLE CARBOXYLASE CATALYTIC SUBUNIT; 1.
DR   Pfam; PF00731; AIRC; 1.
DR   PIRSF; PIRSF001338; AIR_carboxylase; 1.
DR   SMART; SM01001; AIRC; 1.
DR   SUPFAM; SSF52255; N5-CAIR mutase (phosphoribosylaminoimidazole carboxylase, PurE); 1.
PE   3: Inferred from homology;
KW   Isomerase {ECO:0000256|ARBA:ARBA00023235, ECO:0000256|HAMAP-Rule:MF_01929};
KW   Lyase {ECO:0000313|EMBL:ABR55695.1};
KW   Purine biosynthesis {ECO:0000256|ARBA:ARBA00022755, ECO:0000256|HAMAP-
KW   Rule:MF_01929}; Reference proteome {ECO:0000313|Proteomes:UP000001106}.
FT   DOMAIN          1..145
FT                   /note="PurE"
FT                   /evidence="ECO:0000259|SMART:SM01001"
FT   BINDING         8
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01929,
FT                   ECO:0000256|PIRSR:PIRSR001338-1"
FT   BINDING         11
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01929,
FT                   ECO:0000256|PIRSR:PIRSR001338-1"
FT   BINDING         38
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01929,
FT                   ECO:0000256|PIRSR:PIRSR001338-1"
SQ   SEQUENCE   156 AA;  16729 MW;  442F52DDFAF5DF27 CRC64;
     MITIIMGSES DLKIAEKGAP LLKEFGIPFE VRVASAHRTP ELVEEIMKNS QAKVFIAIAG
     LAAHLPGVVA ALTTKPVIAV PVESKLDGMD ALLSCVQMPP GIPTATVGID RGDNAAILAA
     EIIAISDEEV SKKLVEFREK QKEKVIKSDE KVRNLF
//