ID   XGPT_BUCAI     STANDARD;      PRT;   158 AA.
AC   P57339;
DT   16-OCT-2001 (Rel. 40, Created)
DT   16-OCT-2001 (Rel. 40, Last sequence update)
DT   10-MAY-2005 (Rel. 47, Last annotation update)
DE   Xanthine phosphoribosyltransferase (EC 2.4.2.22) (Xanthine-guanine
DE   phosphoribosyltransferase) (XGPRT).
GN   Name=gpt; OrderedLocusNames=BU251;
OS   Buchnera aphidicola (subsp. Acyrthosiphon pisum) (Acyrthosiphon pisum
OS   symbiotic bacterium).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacteriales;
OC   Enterobacteriaceae; Buchnera.
OX   NCBI_TaxID=118099;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Tokyo 1998;
RX   MEDLINE=20445173; PubMed=10993077; DOI=10.1038/35024074;
RA   Shigenobu S., Watanabe H., Hattori M., Sakaki Y., Ishikawa H.;
RT   "Genome sequence of the endocellular bacterial symbiont of aphids
RT   Buchnera sp. APS.";
RL   Nature 407:81-86(2000).
CC   -!- FUNCTION: Acts on guanine, xanthine and to a lesser extent
CC       hypoxanthine (By similarity).
CC   -!- CATALYTIC ACTIVITY: 9-(5-phospho-beta-D-ribosyl)xanthine +
CC       diphosphate = 5-phospho-alpha-D-ribose 1-diphosphate + xanthine.
CC   -!- COFACTOR: Binds 1 magnesium ion and 1 sulfate ion per subunit (By
CC       similarity).
CC   -!- PATHWAY: Purine salvage.
CC   -!- SUBUNIT: Homotrimer (By similarity).
CC   -!- SUBCELLULAR LOCATION: Cytoplasmic (By similarity).
CC   -!- SIMILARITY: Belongs to the purine/pyrimidine
CC       phosphoribosyltransferase family.
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DR   EMBL; BA000003; BAB12961.1; ALT_INIT; Genomic_DNA.
DR   HSSP; P00501; 1A98.
DR   SMR; P57339; 3-151.
DR   InterPro; IPR002375; Pr/py_rp_transf.
DR   InterPro; IPR000836; PRtransferase.
DR   Pfam; PF00156; Pribosyltran; 1.
DR   PROSITE; PS00103; PUR_PYR_PR_TRANSFER; 1.
KW   Complete proteome; Glycosyltransferase; Magnesium; Metal-binding;
KW   Purine salvage; Transferase.
FT   METAL        91     91       Magnesium.
FT   BINDING      38     38       Sulfate.
SQ   SEQUENCE   158 AA;  18064 MW;  2B40B2A98EAABF28 CRC64;
     MSEKYIVTWD MLQIHTRKLA NRLVKKIHSW NGIIAVSRGG LVPSALLARE LGLRCVDTVC
     IESYNYDCLK ENRKIIKKAE GNGEKIIVID DLVDTGGTAK IIRKLYPKAC FVTIFAKPMG
     RSLVDNYIID IPQNVWIEQP WDMSISYIPP LIQNYKIK
//