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Database: UniProt
Entry: B1CBX1_9FIRM
LinkDB: B1CBX1_9FIRM
Original site: B1CBX1_9FIRM 
ID   B1CBX1_9FIRM            Unreviewed;       201 AA.
AC   B1CBX1;
DT   29-APR-2008, integrated into UniProtKB/TrEMBL.
DT   29-APR-2008, sequence version 1.
DT   24-JAN-2024, entry version 74.
DE   RecName: Full=Imidazole glycerol phosphate synthase subunit HisH {ECO:0000256|HAMAP-Rule:MF_00278};
DE            EC=4.3.2.10 {ECO:0000256|HAMAP-Rule:MF_00278};
DE   AltName: Full=IGP synthase glutaminase subunit {ECO:0000256|HAMAP-Rule:MF_00278};
DE            EC=3.5.1.2 {ECO:0000256|HAMAP-Rule:MF_00278};
DE   AltName: Full=IGP synthase subunit HisH {ECO:0000256|HAMAP-Rule:MF_00278};
DE   AltName: Full=ImGP synthase subunit HisH {ECO:0000256|HAMAP-Rule:MF_00278};
DE            Short=IGPS subunit HisH {ECO:0000256|HAMAP-Rule:MF_00278};
GN   Name=hisH {ECO:0000256|HAMAP-Rule:MF_00278,
GN   ECO:0000313|EMBL:EDS71768.1};
GN   ORFNames=ANASTE_01470 {ECO:0000313|EMBL:EDS71768.1};
OS   Anaerofustis stercorihominis DSM 17244.
OC   Bacteria; Bacillota; Clostridia; Eubacteriales; Eubacteriaceae;
OC   Anaerofustis.
OX   NCBI_TaxID=445971 {ECO:0000313|EMBL:EDS71768.1, ECO:0000313|Proteomes:UP000005178};
RN   [1] {ECO:0000313|EMBL:EDS71768.1, ECO:0000313|Proteomes:UP000005178}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 17244 {ECO:0000313|EMBL:EDS71768.1,
RC   ECO:0000313|Proteomes:UP000005178};
RA   Sudarsanam P., Ley R., Guruge J., Turnbaugh P.J., Mahowald M., Liep D.,
RA   Gordon J.;
RT   "Draft genome sequence of Anaerofustis stercorihominis (DSM 17244).";
RL   Submitted (JAN-2008) to the EMBL/GenBank/DDBJ databases.
RN   [2] {ECO:0000313|EMBL:EDS71768.1, ECO:0000313|Proteomes:UP000005178}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 17244 {ECO:0000313|EMBL:EDS71768.1,
RC   ECO:0000313|Proteomes:UP000005178};
RA   Fulton L., Clifton S., Fulton B., Xu J., Minx P., Pepin K.H., Johnson M.,
RA   Thiruvilangam P., Bhonagiri V., Nash W.E., Mardis E.R., Wilson R.K.;
RL   Submitted (JAN-2008) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: IGPS catalyzes the conversion of PRFAR and glutamine to IGP,
CC       AICAR and glutamate. The HisH subunit catalyzes the hydrolysis of
CC       glutamine to glutamate and ammonia as part of the synthesis of IGP and
CC       AICAR. The resulting ammonia molecule is channeled to the active site
CC       of HisF. {ECO:0000256|HAMAP-Rule:MF_00278}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=5-[(5-phospho-1-deoxy-D-ribulos-1-ylimino)methylamino]-1-(5-
CC         phospho-beta-D-ribosyl)imidazole-4-carboxamide + L-glutamine = 5-
CC         amino-1-(5-phospho-beta-D-ribosyl)imidazole-4-carboxamide + D-
CC         erythro-1-(imidazol-4-yl)glycerol 3-phosphate + H(+) + L-glutamate;
CC         Xref=Rhea:RHEA:24793, ChEBI:CHEBI:15378, ChEBI:CHEBI:29985,
CC         ChEBI:CHEBI:58278, ChEBI:CHEBI:58359, ChEBI:CHEBI:58475,
CC         ChEBI:CHEBI:58525; EC=4.3.2.10;
CC         Evidence={ECO:0000256|ARBA:ARBA00000619, ECO:0000256|HAMAP-
CC         Rule:MF_00278};
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; EC=3.5.1.2;
CC         Evidence={ECO:0000256|ARBA:ARBA00001062, ECO:0000256|HAMAP-
CC         Rule:MF_00278};
CC   -!- PATHWAY: Amino-acid biosynthesis; L-histidine biosynthesis; L-histidine
CC       from 5-phospho-alpha-D-ribose 1-diphosphate: step 5/9.
CC       {ECO:0000256|ARBA:ARBA00005091, ECO:0000256|HAMAP-Rule:MF_00278}.
CC   -!- SUBUNIT: Heterodimer of HisH and HisF. {ECO:0000256|ARBA:ARBA00011152,
CC       ECO:0000256|HAMAP-Rule:MF_00278}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000256|HAMAP-Rule:MF_00278}.
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:EDS71768.1}.
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DR   EMBL; ABIL02000006; EDS71768.1; -; Genomic_DNA.
DR   RefSeq; WP_007050238.1; NZ_DS560019.1.
DR   AlphaFoldDB; B1CBX1; -.
DR   STRING; 445971.ANASTE_01470; -.
DR   eggNOG; COG0118; Bacteria.
DR   HOGENOM; CLU_071837_2_2_9; -.
DR   OrthoDB; 9807137at2; -.
DR   UniPathway; UPA00031; UER00010.
DR   Proteomes; UP000005178; Unassembled WGS sequence.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0004359; F:glutaminase activity; IEA:UniProtKB-EC.
DR   GO; GO:0000107; F:imidazoleglycerol-phosphate synthase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0016829; F:lyase activity; IEA:UniProtKB-KW.
DR   GO; GO:0006541; P:glutamine metabolic process; IEA:UniProtKB-UniRule.
DR   GO; GO:0000105; P:histidine biosynthetic process; IEA:UniProtKB-UniRule.
DR   CDD; cd01748; GATase1_IGP_Synthase; 1.
DR   Gene3D; 3.40.50.880; -; 1.
DR   HAMAP; MF_00278; HisH; 1.
DR   InterPro; IPR029062; Class_I_gatase-like.
DR   InterPro; IPR017926; GATASE.
DR   InterPro; IPR010139; Imidazole-glycPsynth_HisH.
DR   NCBIfam; TIGR01855; IMP_synth_hisH; 1.
DR   PANTHER; PTHR42701; IMIDAZOLE GLYCEROL PHOSPHATE SYNTHASE SUBUNIT HISH; 1.
DR   PANTHER; PTHR42701:SF1; IMIDAZOLE GLYCEROL PHOSPHATE SYNTHASE SUBUNIT HISH; 1.
DR   Pfam; PF00117; GATase; 1.
DR   PIRSF; PIRSF000495; Amidotransf_hisH; 1.
DR   SUPFAM; SSF52317; Class I glutamine amidotransferase-like; 1.
DR   PROSITE; PS51273; GATASE_TYPE_1; 1.
PE   3: Inferred from homology;
KW   Amino-acid biosynthesis {ECO:0000256|ARBA:ARBA00022605, ECO:0000256|HAMAP-
KW   Rule:MF_00278}; Cytoplasm {ECO:0000256|HAMAP-Rule:MF_00278};
KW   Glutamine amidotransferase {ECO:0000256|HAMAP-Rule:MF_00278,
KW   ECO:0000256|PROSITE-ProRule:PRU00605};
KW   Glycosyltransferase {ECO:0000313|EMBL:EDS71768.1};
KW   Histidine biosynthesis {ECO:0000256|ARBA:ARBA00023102, ECO:0000256|HAMAP-
KW   Rule:MF_00278};
KW   Hydrolase {ECO:0000256|ARBA:ARBA00022801, ECO:0000256|HAMAP-Rule:MF_00278};
KW   Lyase {ECO:0000256|ARBA:ARBA00023239, ECO:0000256|HAMAP-Rule:MF_00278};
KW   Reference proteome {ECO:0000313|Proteomes:UP000005178};
KW   Transferase {ECO:0000313|EMBL:EDS71768.1}.
FT   DOMAIN          4..193
FT                   /note="Glutamine amidotransferase"
FT                   /evidence="ECO:0000259|Pfam:PF00117"
FT   ACT_SITE        79
FT                   /note="Nucleophile"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00278,
FT                   ECO:0000256|PIRSR:PIRSR000495-1"
FT   ACT_SITE        183
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00278,
FT                   ECO:0000256|PIRSR:PIRSR000495-1"
FT   ACT_SITE        185
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00278,
FT                   ECO:0000256|PIRSR:PIRSR000495-1"
SQ   SEQUENCE   201 AA;  22761 MW;  E5B23C83EE83FC4C CRC64;
     MIGIIDYGAG NLRNVYNTLS RLGYESVITN DTEVLKNCEK LIIPGVGAFE DGMKGLRENN
     LISFLNDWVK DGKYLLGICL GMQLLFDKSY EMGEHDGLGF IKGDVVPFDI PKSYKVPHMG
     WNELIINQTD NIVKDVNNGE YVYFVHSYHA DKMNDEDLIA YSEYHYNVPA VVRHGNVIGM
     QFHPEKSDKT GTKLLLNYLG E
//
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