ID G4R7S5_PELHB Unreviewed; 216 AA.
AC G4R7S5;
DT 14-DEC-2011, integrated into UniProtKB/TrEMBL.
DT 14-DEC-2011, sequence version 1.
DT 27-MAR-2024, entry version 64.
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 OrderedLocusNames=KKY_3348 {ECO:0000313|EMBL:AEQ53335.1};
OS Pelagibacterium halotolerans (strain DSM 22347 / JCM 15775 / CGMCC 1.7692 /
OS B2).
OC Bacteria; Pseudomonadota; Alphaproteobacteria; Hyphomicrobiales;
OC Devosiaceae; Pelagibacterium.
OX NCBI_TaxID=1082931 {ECO:0000313|EMBL:AEQ53335.1, ECO:0000313|Proteomes:UP000008850};
RN [1] {ECO:0000313|EMBL:AEQ53335.1, ECO:0000313|Proteomes:UP000008850}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 22347 / JCM 15775 / CGMCC 1.7692 / B2
RC {ECO:0000313|Proteomes:UP000008850};
RX PubMed=22156395; DOI=10.1128/JB.06343-11;
RA Huo Y.Y., Cheng H., Han X.F., Jiang X.W., Sun C., Zhang X.Q., Zhu X.F.,
RA Liu Y.F., Li P.F., Ni P.X., Wu M.;
RT "Complete genome sequence of Pelagibacterium halotolerans B2T.";
RL J. Bacteriol. 194:197-198(2012).
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}.
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DR EMBL; CP003075; AEQ53335.1; -; Genomic_DNA.
DR RefSeq; WP_014132479.1; NC_016078.1.
DR AlphaFoldDB; G4R7S5; -.
DR STRING; 1082931.KKY_3348; -.
DR MEROPS; C26.965; -.
DR KEGG; phl:KKY_3348; -.
DR PATRIC; fig|1082931.4.peg.3300; -.
DR eggNOG; COG0118; Bacteria.
DR HOGENOM; CLU_071837_2_0_5; -.
DR UniPathway; UPA00031; UER00010.
DR Proteomes; UP000008850; Chromosome.
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 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:UP000008850};
KW Transferase {ECO:0000313|EMBL:AEQ53335.1}.
FT DOMAIN 24..212
FT /note="Glutamine amidotransferase"
FT /evidence="ECO:0000259|Pfam:PF00117"
FT ACT_SITE 88
FT /note="Nucleophile"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00278,
FT ECO:0000256|PIRSR:PIRSR000495-1"
FT ACT_SITE 196
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00278,
FT ECO:0000256|PIRSR:PIRSR000495-1"
FT ACT_SITE 198
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00278,
FT ECO:0000256|PIRSR:PIRSR000495-1"
SQ SEQUENCE 216 AA; 22746 MW; 142E5F2782243A2F CRC64;
MIQTVAIIDY GAGNLKSAQK AFARAAEGTG TEIVVTSDAD LVRKADRIVL PGVGAFADCM
AGLDAVAGMH EVLTEKVIAG GAPFLGVCVG MQLLASVGRE KIETKGLGWI AGAIEKIEPS
DPALKVPHMG WNTLSVSRPH ALLEGIATGE NGLHAYFVHS YHMKAENADE VIATADYGGP
ITAIVGRDNI FGTQFHPEKS QTLGLALIAN FLKWRP
//
