ID   XPT_BACP2               Reviewed;         194 AA.
AC   A8FEE7;
DT   10-JUN-2008, integrated into UniProtKB/Swiss-Prot.
DT   13-NOV-2007, sequence version 1.
DT   03-AUG-2022, entry version 76.
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=BPUM_1944;
OS   Bacillus pumilus (strain SAFR-032).
OC   Bacteria; Firmicutes; Bacilli; Bacillales; Bacillaceae; Bacillus.
OX   NCBI_TaxID=315750;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=SAFR-032;
RX   PubMed=17895969; DOI=10.1371/journal.pone.0000928;
RA   Gioia J., Yerrapragada S., Qin X., Jiang H., Igboeli O.C., Muzny D.,
RA   Dugan-Rocha S., Ding Y., Hawes A., Liu W., Perez L., Kovar C., Dinh H.,
RA   Lee S., Nazareth L., Blyth P., Holder M., Buhay C., Tirumalai M.R., Liu Y.,
RA   Dasgupta I., Bokhetache L., Fujita M., Karouia F., Eswara Moorthy P.,
RA   Siefert J., Uzman A., Buzumbo P., Verma A., Zwiya H., McWilliams B.D.,
RA   Olowu A., Clinkenbeard K.D., Newcombe D., Golebiewski L., Petrosino J.F.,
RA   Nicholson W.L., Fox G.E., Venkateswaran K., Highlander S.K.,
RA   Weinstock G.M.;
RT   "Paradoxical DNA repair and peroxide resistance gene conservation in
RT   Bacillus pumilus SAFR-032.";
RL   PLoS ONE 2:E928-E928(2007).
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; CP000813; ABV62614.1; -; Genomic_DNA.
DR   RefSeq; WP_012010330.1; NZ_VEIS01000001.1.
DR   AlphaFoldDB; A8FEE7; -.
DR   SMR; A8FEE7; -.
DR   STRING; 315750.BPUM_1944; -.
DR   EnsemblBacteria; ABV62614; ABV62614; BPUM_1944.
DR   KEGG; bpu:BPUM_1944; -.
DR   eggNOG; COG0503; Bacteria.
DR   HOGENOM; CLU_099015_0_0_9; -.
DR   OMA; HQVDPVL; -.
DR   OrthoDB; 1532478at2; -.
DR   UniPathway; UPA00602; UER00658.
DR   Proteomes; UP000001355; 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   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..194
FT                   /note="Xanthine phosphoribosyltransferase"
FT                   /id="PRO_0000339667"
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   194 AA;  21163 MW;  19FF81AA57F72C17 CRC64;
     MELLRQKIEN EGIVLSNQVL KVDAFLNHQI DPVLMHEIGQ EFAKLFKHDG ITKIITIESS
     GIAPAVMAGL ALQVPVVFAR KRQSLTLTEN LLTASVYSFT KKVESTIAVS NTHLGEKDCV
     LIIDDFLANG EAAKGLAAIA KQAKAKVAGF GIVIEKSFQP GRDALVQMGY RVESLARIES
     LEEGKVTFVR EVQS