ID   GUAC_HELPY              Reviewed;         327 AA.
AC   O25525;
DT   15-MAR-2004, integrated into UniProtKB/Swiss-Prot.
DT   01-JAN-1998, sequence version 1.
DT   03-AUG-2022, entry version 118.
DE   RecName: Full=GMP reductase {ECO:0000255|HAMAP-Rule:MF_01511};
DE            EC=1.7.1.7 {ECO:0000255|HAMAP-Rule:MF_01511};
DE   AltName: Full=Guanosine 5'-monophosphate oxidoreductase {ECO:0000255|HAMAP-Rule:MF_01511};
DE            Short=Guanosine monophosphate reductase {ECO:0000255|HAMAP-Rule:MF_01511};
GN   Name=guaC {ECO:0000255|HAMAP-Rule:MF_01511}; OrderedLocusNames=HP_0854;
OS   Helicobacter pylori (strain ATCC 700392 / 26695) (Campylobacter pylori).
OC   Bacteria; Proteobacteria; Epsilonproteobacteria; Campylobacterales;
OC   Helicobacteraceae; Helicobacter.
OX   NCBI_TaxID=85962;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 700392 / 26695;
RX   PubMed=9252185; DOI=10.1038/41483;
RA   Tomb J.-F., White O., Kerlavage A.R., Clayton R.A., Sutton G.G.,
RA   Fleischmann R.D., Ketchum K.A., Klenk H.-P., Gill S.R., Dougherty B.A.,
RA   Nelson K.E., Quackenbush J., Zhou L., Kirkness E.F., Peterson S.N.,
RA   Loftus B.J., Richardson D.L., Dodson R.J., Khalak H.G., Glodek A.,
RA   McKenney K., FitzGerald L.M., Lee N., Adams M.D., Hickey E.K., Berg D.E.,
RA   Gocayne J.D., Utterback T.R., Peterson J.D., Kelley J.M., Cotton M.D.,
RA   Weidman J.F., Fujii C., Bowman C., Watthey L., Wallin E., Hayes W.S.,
RA   Borodovsky M., Karp P.D., Smith H.O., Fraser C.M., Venter J.C.;
RT   "The complete genome sequence of the gastric pathogen Helicobacter
RT   pylori.";
RL   Nature 388:539-547(1997).
CC   -!- FUNCTION: Catalyzes the irreversible NADPH-dependent deamination of GMP
CC       to IMP. It functions in the conversion of nucleobase, nucleoside and
CC       nucleotide derivatives of G to A nucleotides, and in maintaining the
CC       intracellular balance of A and G nucleotides. {ECO:0000255|HAMAP-
CC       Rule:MF_01511}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=IMP + NADP(+) + NH4(+) = GMP + 2 H(+) + NADPH;
CC         Xref=Rhea:RHEA:17185, ChEBI:CHEBI:15378, ChEBI:CHEBI:28938,
CC         ChEBI:CHEBI:57783, ChEBI:CHEBI:58053, ChEBI:CHEBI:58115,
CC         ChEBI:CHEBI:58349; EC=1.7.1.7; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_01511};
CC   -!- SIMILARITY: Belongs to the IMPDH/GMPR family. GuaC type 2 subfamily.
CC       {ECO:0000255|HAMAP-Rule:MF_01511}.
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DR   EMBL; AE000511; AAD07901.1; -; Genomic_DNA.
DR   PIR; F64626; F64626.
DR   RefSeq; NP_207648.1; NC_000915.1.
DR   RefSeq; WP_010875554.1; NC_018939.1.
DR   AlphaFoldDB; O25525; -.
DR   SMR; O25525; -.
DR   DIP; DIP-3407N; -.
DR   IntAct; O25525; 1.
DR   MINT; O25525; -.
DR   STRING; 85962.C694_04375; -.
DR   PaxDb; O25525; -.
DR   EnsemblBacteria; AAD07901; AAD07901; HP_0854.
DR   KEGG; hpy:HP_0854; -.
DR   PATRIC; fig|85962.8.peg.886; -.
DR   eggNOG; COG0516; Bacteria.
DR   OMA; AYKEYFG; -.
DR   PhylomeDB; O25525; -.
DR   Proteomes; UP000000429; Chromosome.
DR   GO; GO:1902560; C:GMP reductase complex; IEA:InterPro.
DR   GO; GO:0003920; F:GMP reductase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0006163; P:purine nucleotide metabolic process; IEA:UniProtKB-UniRule.
DR   CDD; cd00381; IMPDH; 1.
DR   Gene3D; 3.20.20.70; -; 1.
DR   HAMAP; MF_01511; GMP_reduct_type2; 1.
DR   InterPro; IPR013785; Aldolase_TIM.
DR   InterPro; IPR005994; GuaC_type_2.
DR   InterPro; IPR015875; IMP_DH/GMP_Rdtase_CS.
DR   InterPro; IPR001093; IMP_DH_GMPRt.
DR   Pfam; PF00478; IMPDH; 1.
DR   PIRSF; PIRSF036500; GMP_red_Firmic; 1.
DR   TIGRFAMs; TIGR01306; GMP_reduct_2; 1.
DR   PROSITE; PS00487; IMP_DH_GMP_RED; 1.
PE   3: Inferred from homology;
KW   NADP; Oxidoreductase; Reference proteome.
FT   CHAIN           1..327
FT                   /note="GMP reductase"
FT                   /id="PRO_0000093756"
FT   ACT_SITE        176
FT                   /note="Thioimidate intermediate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01511"
FT   BINDING         205..228
FT                   /ligand="NADP(+)"
FT                   /ligand_id="ChEBI:CHEBI:58349"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01511"
SQ   SEQUENCE   327 AA;  36039 MW;  E9ED3053C3E103C8 CRC64;
     MSLKVFDYED VQLIPNKCIV NSRSECDTTV ILGKHAFKMP IVPANMQTII NESIAEFLAE
     NGYFYIMHRF DGAARIPFVK KMKKRQWISS ISVGVKKEEC LFVEELAKQG LAPDYITIDI
     AHGHSNSVIE MIQRIKTHLP ETFVIAGNVG TPEAVRELEN AGADATKVGI GPGKVCITKI
     KTGFGTGGWQ LAALRWCAKA ARKPIIADGG IRTHGDIVKS IRFGATMVMI GSLFAGHEES
     SGETKIENGI AYKEYFGSAS EFQKGEKKNI EGKKIWIQHK GSLKDTLVEM HQDLQSSISY
     AGGRDLEAIR KVDYVIVKNS IFNGDAI