ID   HGPRT_ENTFA             Reviewed;         181 AA.
AC   Q839B2;
DT   27-SEP-2005, integrated into UniProtKB/Swiss-Prot.
DT   01-JUN-2003, sequence version 1.
DT   27-MAR-2024, entry version 112.
DE   RecName: Full=Hypoxanthine-guanine phosphoribosyltransferase;
DE            Short=HGPRT;
DE            Short=HGPRTase;
DE            EC=2.4.2.8 {ECO:0000250|UniProtKB:P9WHQ9};
GN   Name=hpt; OrderedLocusNames=EF_0264;
OS   Enterococcus faecalis (strain ATCC 700802 / V583).
OC   Bacteria; Bacillota; Bacilli; Lactobacillales; Enterococcaceae;
OC   Enterococcus.
OX   NCBI_TaxID=226185;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 700802 / V583;
RX   PubMed=12663927; DOI=10.1126/science.1080613;
RA   Paulsen I.T., Banerjei L., Myers G.S.A., Nelson K.E., Seshadri R.,
RA   Read T.D., Fouts D.E., Eisen J.A., Gill S.R., Heidelberg J.F., Tettelin H.,
RA   Dodson R.J., Umayam L.A., Brinkac L.M., Beanan M.J., Daugherty S.C.,
RA   DeBoy R.T., Durkin S.A., Kolonay J.F., Madupu R., Nelson W.C.,
RA   Vamathevan J.J., Tran B., Upton J., Hansen T., Shetty J., Khouri H.M.,
RA   Utterback T.R., Radune D., Ketchum K.A., Dougherty B.A., Fraser C.M.;
RT   "Role of mobile DNA in the evolution of vancomycin-resistant Enterococcus
RT   faecalis.";
RL   Science 299:2071-2074(2003).
CC   -!- FUNCTION: Purine salvage pathway enzyme that catalyzes the transfer of
CC       the ribosyl-5-phosphate group from 5-phospho-alpha-D-ribose 1-
CC       diphosphate (PRPP) to the N9 position of the 6-oxopurines hypoxanthine
CC       and guanine to form the corresponding ribonucleotides IMP (inosine 5'-
CC       monophosphate) and GMP (guanosine 5'-monophosphate), with the release
CC       of PPi. {ECO:0000250|UniProtKB:P9WHQ9}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=diphosphate + IMP = 5-phospho-alpha-D-ribose 1-diphosphate +
CC         hypoxanthine; Xref=Rhea:RHEA:17973, ChEBI:CHEBI:17368,
CC         ChEBI:CHEBI:33019, ChEBI:CHEBI:58017, ChEBI:CHEBI:58053; EC=2.4.2.8;
CC         Evidence={ECO:0000250|UniProtKB:P9WHQ9};
CC       PhysiologicalDirection=right-to-left; Xref=Rhea:RHEA:17975;
CC         Evidence={ECO:0000250|UniProtKB:P9WHQ9};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=diphosphate + GMP = 5-phospho-alpha-D-ribose 1-diphosphate +
CC         guanine; Xref=Rhea:RHEA:25424, ChEBI:CHEBI:16235, ChEBI:CHEBI:33019,
CC         ChEBI:CHEBI:58017, ChEBI:CHEBI:58115; EC=2.4.2.8;
CC         Evidence={ECO:0000250|UniProtKB:P9WHQ9};
CC       PhysiologicalDirection=right-to-left; Xref=Rhea:RHEA:25426;
CC         Evidence={ECO:0000250|UniProtKB:P9WHQ9};
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC         Evidence={ECO:0000250|UniProtKB:P9WHQ9};
CC   -!- PATHWAY: Purine metabolism; IMP biosynthesis via salvage pathway; IMP
CC       from hypoxanthine: step 1/1. {ECO:0000250|UniProtKB:P9WHQ9}.
CC   -!- PATHWAY: Purine metabolism; GMP biosynthesis via salvage pathway; GMP
CC       from guanine: step 1/1. {ECO:0000250|UniProtKB:P9WHQ9}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the purine/pyrimidine phosphoribosyltransferase
CC       family. {ECO:0000305}.
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DR   EMBL; AE016830; AAO80129.1; -; Genomic_DNA.
DR   RefSeq; NP_814058.1; NC_004668.1.
DR   RefSeq; WP_002356260.1; NZ_KE136524.1.
DR   AlphaFoldDB; Q839B2; -.
DR   SMR; Q839B2; -.
DR   STRING; 226185.EF_0264; -.
DR   EnsemblBacteria; AAO80129; AAO80129; EF_0264.
DR   GeneID; 60892755; -.
DR   KEGG; efa:EF0264; -.
DR   PATRIC; fig|226185.45.peg.5; -.
DR   eggNOG; COG0634; Bacteria.
DR   HOGENOM; CLU_073615_0_0_9; -.
DR   UniPathway; UPA00591; UER00648.
DR   UniPathway; UPA00909; UER00887.
DR   Proteomes; UP000001415; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0052657; F:guanine phosphoribosyltransferase activity; IEA:UniProtKB-EC.
DR   GO; GO:0004422; F:hypoxanthine phosphoribosyltransferase activity; IEA:UniProtKB-EC.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0000166; F:nucleotide binding; IEA:UniProtKB-KW.
DR   GO; GO:0032263; P:GMP salvage; IEA:UniProtKB-UniPathway.
DR   GO; GO:0032264; P:IMP salvage; IEA:UniProtKB-UniPathway.
DR   GO; GO:0006166; P:purine ribonucleoside salvage; IEA:UniProtKB-KW.
DR   CDD; cd06223; PRTases_typeI; 1.
DR   Gene3D; 3.40.50.2020; -; 1.
DR   InterPro; IPR005904; Hxn_phspho_trans.
DR   InterPro; IPR000836; PRibTrfase_dom.
DR   InterPro; IPR029057; PRTase-like.
DR   NCBIfam; TIGR01203; HGPRTase; 1.
DR   PANTHER; PTHR43340:SF1; HYPOXANTHINE PHOSPHORIBOSYLTRANSFERASE; 1.
DR   PANTHER; PTHR43340; HYPOXANTHINE-GUANINE PHOSPHORIBOSYLTRANSFERASE; 1.
DR   Pfam; PF00156; Pribosyltran; 1.
DR   SUPFAM; SSF53271; PRTase-like; 1.
DR   PROSITE; PS00103; PUR_PYR_PR_TRANSFER; 1.
PE   3: Inferred from homology;
KW   Cytoplasm; Glycosyltransferase; Magnesium; Metal-binding;
KW   Nucleotide-binding; Purine salvage; Reference proteome; Transferase.
FT   CHAIN           1..181
FT                   /note="Hypoxanthine-guanine phosphoribosyltransferase"
FT                   /id="PRO_0000139603"
FT   ACT_SITE        103
FT                   /note="Proton acceptor"
FT                   /evidence="ECO:0000250|UniProtKB:P0A9M2"
FT   BINDING         43
FT                   /ligand="diphosphate"
FT                   /ligand_id="ChEBI:CHEBI:33019"
FT                   /evidence="ECO:0000250|UniProtKB:P9WHQ9"
FT   BINDING         44
FT                   /ligand="diphosphate"
FT                   /ligand_id="ChEBI:CHEBI:33019"
FT                   /evidence="ECO:0000250|UniProtKB:P9WHQ9"
FT   BINDING         99
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000250|UniProtKB:P9WHQ9"
FT   BINDING         100
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000250|UniProtKB:P9WHQ9"
FT   BINDING         131
FT                   /ligand="GMP"
FT                   /ligand_id="ChEBI:CHEBI:58115"
FT                   /evidence="ECO:0000250|UniProtKB:P9WHQ9"
FT   BINDING         152..153
FT                   /ligand="GMP"
FT                   /ligand_id="ChEBI:CHEBI:58115"
FT                   /evidence="ECO:0000250|UniProtKB:P9WHQ9"
FT   BINDING         159
FT                   /ligand="GMP"
FT                   /ligand_id="ChEBI:CHEBI:58115"
FT                   /evidence="ECO:0000250|UniProtKB:P9WHQ9"
FT   BINDING         165
FT                   /ligand="diphosphate"
FT                   /ligand_id="ChEBI:CHEBI:33019"
FT                   /evidence="ECO:0000250|UniProtKB:P9WHQ9"
SQ   SEQUENCE   181 AA;  20272 MW;  835B70765C543114 CRC64;
     MIEKDIEKVL ISKEEILAKS AELGKQLTEE YQGKNPLVVG ILKGAVPFMA DLTREINTYL
     ELDFMDVSSY GNATVSSGEV KIVKDLDTNV EGRHILIVED IIDSGRTLAY LVDLFRYRKA
     ASVKIVTLLD KPEGRVVDIK ADYVGFDVPN EFVVGYGLDY AETYRNLPYI GVLKPEVYES
     N
//