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HIS52_PROMM
ID   HIS52_PROMM             Reviewed;         213 AA.
AC   Q7V6M5;
DT   15-MAR-2004, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-2003, sequence version 1.
DT   25-MAY-2022, entry version 110.
DE   RecName: Full=Imidazole glycerol phosphate synthase subunit HisH 2;
DE            EC=4.3.2.10;
DE   AltName: Full=IGP synthase glutaminase subunit 2;
DE            EC=3.5.1.2;
DE   AltName: Full=IGP synthase subunit HisH 2;
DE   AltName: Full=ImGP synthase subunit HisH 2;
DE            Short=IGPS subunit HisH 2;
GN   Name=hisH2; OrderedLocusNames=PMT_1128;
OS   Prochlorococcus marinus (strain MIT 9313).
OC   Bacteria; Cyanobacteria; Synechococcales; Prochlorococcaceae;
OC   Prochlorococcus.
OX   NCBI_TaxID=74547;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=MIT 9313;
RX   PubMed=12917642; DOI=10.1038/nature01947;
RA   Rocap G., Larimer F.W., Lamerdin J.E., Malfatti S., Chain P., Ahlgren N.A.,
RA   Arellano A., Coleman M., Hauser L., Hess W.R., Johnson Z.I., Land M.L.,
RA   Lindell D., Post A.F., Regala W., Shah M., Shaw S.L., Steglich C.,
RA   Sullivan M.B., Ting C.S., Tolonen A., Webb E.A., Zinser E.R.,
RA   Chisholm S.W.;
RT   "Genome divergence in two Prochlorococcus ecotypes reflects oceanic niche
RT   differentiation.";
RL   Nature 424:1042-1047(2003).
CC   -!- FUNCTION: IGPS catalyzes the conversion of PRFAR and glutamine to IGP,
CC       AICAR and glutamate. The HisH subunit provides the glutamine
CC       amidotransferase activity that produces the ammonia necessary to HisF
CC       for the synthesis of IGP and AICAR (By similarity). {ECO:0000250}.
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   -!- 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   -!- PATHWAY: Amino-acid biosynthesis; L-histidine biosynthesis; L-histidine
CC       from 5-phospho-alpha-D-ribose 1-diphosphate: step 5/9.
CC   -!- SUBUNIT: Heterodimer of HisH and HisF. {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000250}.
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DR   EMBL; BX548175; CAE21303.1; -; Genomic_DNA.
DR   RefSeq; WP_011130500.1; NC_005071.1.
DR   AlphaFoldDB; Q7V6M5; -.
DR   SMR; Q7V6M5; -.
DR   STRING; 74547.PMT_1128; -.
DR   EnsemblBacteria; CAE21303; CAE21303; PMT_1128.
DR   KEGG; pmt:PMT_1128; -.
DR   eggNOG; COG0118; Bacteria.
DR   HOGENOM; CLU_071837_2_2_3; -.
DR   OMA; WVYFVHS; -.
DR   OrthoDB; 1726024at2; -.
DR   UniPathway; UPA00031; UER00010.
DR   Proteomes; UP000001423; 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..213
FT                   /note="Imidazole glycerol phosphate synthase subunit HisH
FT                   2"
FT                   /id="PRO_0000152406"
FT   DOMAIN          4..211
FT                   /note="Glutamine amidotransferase type-1"
FT   ACT_SITE        82
FT                   /note="Nucleophile"
FT                   /evidence="ECO:0000250"
FT   ACT_SITE        186
FT                   /evidence="ECO:0000250"
FT   ACT_SITE        188
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   213 AA;  23576 MW;  9413480EB15106C3 CRC64;
     MITRLGLIDY GMGNLRSVQI AFERLHKALH IVRQPADLSR CDALILPGVG AFDPAMVHLE
     QTRLVPDLKS WVKGGRPLLG ICLGLQLLFE SSDEGNATGL GLLKGHVQRL PSNQGERIPH
     MGWAALEHRN DCPLLDKEDP DSWMYFVHSY AAVPSQNSDL AAIAPFGRDN ITAMVWKGRL
     GACQFHPEKS AAAGERMLRR WLNWLETGAK PVP
 
 
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