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HIS5_HERA2
ID   HIS5_HERA2              Reviewed;         210 AA.
AC   A9B5I2;
DT   24-MAR-2009, integrated into UniProtKB/Swiss-Prot.
DT   15-JAN-2008, sequence version 1.
DT   25-MAY-2022, entry version 78.
DE   RecName: Full=Imidazole glycerol phosphate synthase subunit HisH {ECO:0000255|HAMAP-Rule:MF_00278};
DE            EC=4.3.2.10 {ECO:0000255|HAMAP-Rule:MF_00278};
DE   AltName: Full=IGP synthase glutaminase subunit {ECO:0000255|HAMAP-Rule:MF_00278};
DE            EC=3.5.1.2 {ECO:0000255|HAMAP-Rule:MF_00278};
DE   AltName: Full=IGP synthase subunit HisH {ECO:0000255|HAMAP-Rule:MF_00278};
DE   AltName: Full=ImGP synthase subunit HisH {ECO:0000255|HAMAP-Rule:MF_00278};
DE            Short=IGPS subunit HisH {ECO:0000255|HAMAP-Rule:MF_00278};
GN   Name=hisH {ECO:0000255|HAMAP-Rule:MF_00278}; OrderedLocusNames=Haur_0155;
OS   Herpetosiphon aurantiacus (strain ATCC 23779 / DSM 785 / 114-95).
OC   Bacteria; Chloroflexi; Chloroflexia; Herpetosiphonales; Herpetosiphonaceae;
OC   Herpetosiphon.
OX   NCBI_TaxID=316274;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 23779 / DSM 785 / 114-95;
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., Kiss H., Brettin T., Bruce D., Detter J.C., Han C.,
RA   Schmutz J., Larimer F., Land M., Hauser L., Kyrpides N., Kim E.,
RA   Bryant D.A., Richardson P.;
RT   "Complete sequence of chromosome of Herpetosiphon aurantiacus ATCC 23779.";
RL   Submitted (OCT-2007) 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:0000255|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; Evidence={ECO:0000255|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:0000255|HAMAP-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:0000255|HAMAP-Rule:MF_00278}.
CC   -!- SUBUNIT: Heterodimer of HisH and HisF. {ECO:0000255|HAMAP-
CC       Rule:MF_00278}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00278}.
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DR   EMBL; CP000875; ABX02807.1; -; Genomic_DNA.
DR   AlphaFoldDB; A9B5I2; -.
DR   SMR; A9B5I2; -.
DR   STRING; 316274.Haur_0155; -.
DR   EnsemblBacteria; ABX02807; ABX02807; Haur_0155.
DR   KEGG; hau:Haur_0155; -.
DR   eggNOG; COG0118; Bacteria.
DR   HOGENOM; CLU_071837_2_2_0; -.
DR   OMA; WVYFVHS; -.
DR   UniPathway; UPA00031; UER00010.
DR   Proteomes; UP000000787; 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-KW.
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   PANTHER; PTHR42701; PTHR42701; 1.
DR   Pfam; PF00117; GATase; 1.
DR   PIRSF; PIRSF000495; Amidotransf_hisH; 1.
DR   SUPFAM; SSF52317; SSF52317; 1.
DR   TIGRFAMs; TIGR01855; IMP_synth_hisH; 1.
DR   PROSITE; PS51273; GATASE_TYPE_1; 1.
PE   3: Inferred from homology;
KW   Amino-acid biosynthesis; Cytoplasm; Glutamine amidotransferase;
KW   Histidine biosynthesis; Hydrolase; Lyase; Reference proteome.
FT   CHAIN           1..210
FT                   /note="Imidazole glycerol phosphate synthase subunit HisH"
FT                   /id="PRO_1000114781"
FT   DOMAIN          1..205
FT                   /note="Glutamine amidotransferase type-1"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00278"
FT   ACT_SITE        79
FT                   /note="Nucleophile"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00278"
FT   ACT_SITE        180
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00278"
FT   ACT_SITE        182
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00278"
SQ   SEQUENCE   210 AA;  22466 MW;  165E7E0E109C3737 CRC64;
     MIAVINYGAG NLPNAVRALE YVQAPIEVVT DPAAVRAAQA VVLPGVGATA DTMRSLREMG
     MDSAIREVIA RGTPFLGICV GMQVLAEQSE EFGLHECLGL VPGTIRRFDQ GLKVPQIGWN
     GVQHDGSALW DGIPNGAEFY FVHSYYLATD DVALVTGRTE YGLNFPAAIA RDNITAVQFH
     PEKSGQWGLK LLGNWVELAL SRGSGVGDRA
 
 
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