ID   XPT_BIFLS               Reviewed;         193 AA.
AC   B7GSB6; E8ML27;
DT   28-JUL-2009, integrated into UniProtKB/Swiss-Prot.
DT   10-FEB-2009, sequence version 1.
DT   03-AUG-2022, entry version 70.
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};
GN   OrderedLocusNames=Blon_1617, BLIJ_1672;
OS   Bifidobacterium longum subsp. infantis (strain ATCC 15697 / DSM 20088 / JCM
OS   1222 / NCTC 11817 / S12).
OC   Bacteria; Actinobacteria; Bifidobacteriales; Bifidobacteriaceae;
OC   Bifidobacterium.
OX   NCBI_TaxID=391904;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 15697 / DSM 20088 / JCM 1222 / NCTC 11817 / S12;
RX   PubMed=19033196; DOI=10.1073/pnas.0809584105;
RA   Sela D.A., Chapman J., Adeuya A., Kim J.H., Chen F., Whitehead T.R.,
RA   Lapidus A., Rokhsar D.S., Lebrilla C.B., German J.B., Price N.P.,
RA   Richardson P.M., Mills D.A.;
RT   "The genome sequence of Bifidobacterium longum subsp. infantis reveals
RT   adaptations for milk utilization within the infant microbiome.";
RL   Proc. Natl. Acad. Sci. U.S.A. 105:18964-18969(2008).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 15697 / DSM 20088 / JCM 1222 / NCTC 11817 / S12;
RX   PubMed=21270894; DOI=10.1038/nature09646;
RA   Fukuda S., Toh H., Hase K., Oshima K., Nakanishi Y., Yoshimura K., Tobe T.,
RA   Clarke J.M., Topping D.L., Suzuki T., Taylor T.D., Itoh K., Kikuchi J.,
RA   Morita H., Hattori M., Ohno H.;
RT   "Bifidobacteria can protect from enteropathogenic infection through
RT   production of acetate.";
RL   Nature 469:543-547(2011).
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}.
CC   ---------------------------------------------------------------------------
CC   Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC   Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC   ---------------------------------------------------------------------------
DR   EMBL; CP001095; ACJ52696.1; -; Genomic_DNA.
DR   EMBL; AP010889; BAJ69254.1; -; Genomic_DNA.
DR   RefSeq; WP_012577931.1; NZ_JDTT01000018.1.
DR   AlphaFoldDB; B7GSB6; -.
DR   SMR; B7GSB6; -.
DR   PRIDE; B7GSB6; -.
DR   EnsemblBacteria; ACJ52696; ACJ52696; Blon_1617.
DR   KEGG; bln:Blon_1617; -.
DR   KEGG; blon:BLIJ_1672; -.
DR   PATRIC; fig|391904.8.peg.1685; -.
DR   HOGENOM; CLU_099015_0_0_11; -.
DR   OMA; HQVDPVL; -.
DR   UniPathway; UPA00602; UER00658.
DR   Proteomes; UP000001360; 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; Transferase.
FT   CHAIN           1..193
FT                   /note="Xanthine phosphoribosyltransferase"
FT                   /id="PRO_1000164448"
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         129..133
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         157
FT                   /ligand="xanthine"
FT                   /ligand_id="ChEBI:CHEBI:17712"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01184"
SQ   SEQUENCE   193 AA;  20857 MW;  6BE3FAB1843A2961 CRC64;
     MQELEERIQS EGTVKEGDVL KVDAFLNHQC DVRLFDRMGS AWAAHFAGKH ITKILTIEAS
     GIGIACVAAQ HFGNVPVVFA KKAQSINLDG DQYTTTVYSF TKQKEFPVIV AKKYLNAGDH
     VLLIDDFLAN GKALRGLINL CEAAGATVEG IGIAVEKGFQ GGGDTLRAEG YDVDSLAIVE
     SMNPETGEIT FRH