ID   XPT_LACJO               Reviewed;         192 AA.
AC   Q74LF9;
DT   10-JUN-2008, integrated into UniProtKB/Swiss-Prot.
DT   05-JUL-2004, sequence version 1.
DT   03-AUG-2022, entry version 112.
DE   RecName: Full=Xanthine phosphoribosyltransferase {ECO:0000255|HAMAP-Rule:MF_01184};
DE            Short=XPRTase {ECO:0000255|HAMAP-Rule:MF_01184};
DE            EC=2.4.2.22 {ECO:0000255|HAMAP-Rule:MF_01184};
GN   Name=xpt {ECO:0000255|HAMAP-Rule:MF_01184}; OrderedLocusNames=LJ_0227;
OS   Lactobacillus johnsonii (strain CNCM I-12250 / La1 / NCC 533).
OC   Bacteria; Firmicutes; Bacilli; Lactobacillales; Lactobacillaceae;
OC   Lactobacillus.
OX   NCBI_TaxID=257314;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=CNCM I-1225 / La1 / NCC 533;
RX   PubMed=14983040; DOI=10.1073/pnas.0307327101;
RA   Pridmore R.D., Berger B., Desiere F., Vilanova D., Barretto C.,
RA   Pittet A.-C., Zwahlen M.-C., Rouvet M., Altermann E., Barrangou R.,
RA   Mollet B., Mercenier A., Klaenhammer T., Arigoni F., Schell M.A.;
RT   "The genome sequence of the probiotic intestinal bacterium Lactobacillus
RT   johnsonii NCC 533.";
RL   Proc. Natl. Acad. Sci. U.S.A. 101:2512-2517(2004).
CC   -!- FUNCTION: Converts the preformed base xanthine, a product of nucleic
CC       acid breakdown, to xanthosine 5'-monophosphate (XMP), so it can be
CC       reused for RNA or DNA synthesis. {ECO:0000255|HAMAP-Rule:MF_01184}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=diphosphate + XMP = 5-phospho-alpha-D-ribose 1-diphosphate +
CC         xanthine; Xref=Rhea:RHEA:10800, ChEBI:CHEBI:17712, ChEBI:CHEBI:33019,
CC         ChEBI:CHEBI:57464, ChEBI:CHEBI:58017; EC=2.4.2.22;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01184};
CC   -!- PATHWAY: Purine metabolism; XMP biosynthesis via salvage pathway; XMP
CC       from xanthine: step 1/1. {ECO:0000255|HAMAP-Rule:MF_01184}.
CC   -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_01184}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_01184}.
CC   -!- SIMILARITY: Belongs to the purine/pyrimidine phosphoribosyltransferase
CC       family. Xpt subfamily. {ECO:0000255|HAMAP-Rule:MF_01184}.
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DR   EMBL; AE017198; AAS08208.1; -; Genomic_DNA.
DR   RefSeq; WP_011161417.1; NC_005362.1.
DR   AlphaFoldDB; Q74LF9; -.
DR   SMR; Q74LF9; -.
DR   STRING; 257314.LJ_0227; -.
DR   EnsemblBacteria; AAS08208; AAS08208; LJ_0227.
DR   KEGG; ljo:LJ_0227; -.
DR   PATRIC; fig|257314.6.peg.238; -.
DR   eggNOG; COG0503; Bacteria.
DR   HOGENOM; CLU_099015_0_0_9; -.
DR   OMA; HQVDPVL; -.
DR   UniPathway; UPA00602; UER00658.
DR   Proteomes; UP000000581; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0000310; F:xanthine phosphoribosyltransferase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0006166; P:purine ribonucleoside salvage; IEA:UniProtKB-UniRule.
DR   GO; GO:0046110; P:xanthine metabolic process; IEA:InterPro.
DR   GO; GO:0032265; P:XMP salvage; IEA:UniProtKB-UniPathway.
DR   CDD; cd06223; PRTases_typeI; 1.
DR   Gene3D; 3.40.50.2020; -; 1.
DR   HAMAP; MF_01184; XPRTase; 1.
DR   InterPro; IPR000836; PRibTrfase_dom.
DR   InterPro; IPR029057; PRTase-like.
DR   InterPro; IPR010079; Xanthine_PRibTrfase.
DR   Pfam; PF00156; Pribosyltran; 1.
DR   SUPFAM; SSF53271; SSF53271; 1.
DR   TIGRFAMs; TIGR01744; XPRTase; 1.
PE   3: Inferred from homology;
KW   Cytoplasm; Glycosyltransferase; Purine salvage; Reference proteome;
KW   Transferase.
FT   CHAIN           1..192
FT                   /note="Xanthine phosphoribosyltransferase"
FT                   /id="PRO_0000339708"
FT   BINDING         20
FT                   /ligand="xanthine"
FT                   /ligand_id="ChEBI:CHEBI:17712"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01184"
FT   BINDING         27
FT                   /ligand="xanthine"
FT                   /ligand_id="ChEBI:CHEBI:17712"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01184"
FT   BINDING         128..132
FT                   /ligand="5-phospho-alpha-D-ribose 1-diphosphate"
FT                   /ligand_id="ChEBI:CHEBI:58017"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01184"
FT   BINDING         156
FT                   /ligand="xanthine"
FT                   /ligand_id="ChEBI:CHEBI:17712"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01184"
SQ   SEQUENCE   192 AA;  21405 MW;  CC11D05093F31B94 CRC64;
     MKLLEERIRK DGEVLDGNVL KINSFLNHQV DPQLMMEVGK EFKRLFENEK ITKVLTCEAS
     GIAPGIMAAY QLGVPMVFAR KKKPSTLNDA VYWADVFSYT KKVNNKICVE KKFLSSDDHL
     LIIDDFLAHG EAVKGMLNIA DQANATVAGV GVVVAKEFQG GSEWVKDHGY SLEALARISD
     FENNQVHFVG EE