ID   GUAC_STAAE              Reviewed;         325 AA.
AC   A6QGN9;
DT   26-FEB-2008, integrated into UniProtKB/Swiss-Prot.
DT   21-AUG-2007, sequence version 1.
DT   03-AUG-2022, entry version 79.
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=NWMN_1249;
OS   Staphylococcus aureus (strain Newman).
OC   Bacteria; Firmicutes; Bacilli; Bacillales; Staphylococcaceae;
OC   Staphylococcus.
OX   NCBI_TaxID=426430;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Newman;
RX   PubMed=17951380; DOI=10.1128/jb.01000-07;
RA   Baba T., Bae T., Schneewind O., Takeuchi F., Hiramatsu K.;
RT   "Genome sequence of Staphylococcus aureus strain Newman and comparative
RT   analysis of staphylococcal genomes: polymorphism and evolution of two major
RT   pathogenicity islands.";
RL   J. Bacteriol. 190:300-310(2008).
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; AP009351; BAF67521.1; -; Genomic_DNA.
DR   RefSeq; WP_000688126.1; NZ_CP023390.1.
DR   AlphaFoldDB; A6QGN9; -.
DR   SMR; A6QGN9; -.
DR   EnsemblBacteria; BAF67521; BAF67521; NWMN_1249.
DR   KEGG; sae:NWMN_1249; -.
DR   HOGENOM; CLU_022552_5_0_9; -.
DR   OMA; AYKEYFG; -.
DR   Proteomes; UP000006386; 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.
FT   CHAIN           1..325
FT                   /note="GMP reductase"
FT                   /id="PRO_1000073533"
FT   ACT_SITE        174
FT                   /note="Thioimidate intermediate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01511"
FT   BINDING         203..226
FT                   /ligand="NADP(+)"
FT                   /ligand_id="ChEBI:CHEBI:58349"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01511"
SQ   SEQUENCE   325 AA;  36116 MW;  F1F1819AB540C446 CRC64;
     MKIFDYEDIQ LIPNKCIVES RSECDTTIQF GPKKFKLPVV PANMQTVMNE KLAKWFAEND
     YFYIMHRFDE EARIPFIKHM QNSGLFASIS VGVKKAEFDF IEKLAQEKLI PEYITIDIAH
     GHSDSVINMI KHIKTHIPDS FVIAGNVGTP EGVRELENAG ADATKVGIGP GRVCITKIKT
     GFGTGGWQLA ALNICSKAAR KPLIADGGIR THGDIAKSIR FGASMVMIGS LFAAHEESPG
     ETVELDGKQY KEYFGSASEF QKGEHKNVEG KKMFVEHKGS LMDTLKEMQQ DLQSSISYAG
     GKDLKSLRTV DYVIVRNSIF NGDRD