ID   XGPT_BUCAI     STANDARD;      PRT;   158 AA.
AC   P57339;
DT   20-AUG-2001 (Rel. 40, Created)
DT   20-AUG-2001 (Rel. 40, Last sequence update)
DT   20-AUG-2001 (Rel. 40, Last annotation update)
DE   XANTHINE-GUANINE PHOSPHORIBOSYLTRANSFERASE (EC 2.4.2.22) (XGPRT).
GN   GPT OR BU251.
OS   Buchnera aphidicola (subsp. Acyrthosiphon pisum) (Acyrthosiphon pisum
OS   symbiotic bacterium).
OC   Bacteria; Proteobacteria; gamma subdivision; Buchnera.
OX   NCBI_TaxID=118099;
RN   [1]
RP   SEQUENCE FROM N.A.
RC   STRAIN=TOKYO 1998;
RX   MEDLINE=20445173; PubMed=10993077;
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: 5-PHOSPHO-ALPHA-D-RIBOSE 1-DIPHOSPHATE +
CC       XANTHINE = (9-D-RIBOSYLXANTHINE)-5'-PHOSPHATE + PYROPHOSPHATE.
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; AP001118; BAB12961.1; ALT_INIT.
DR   InterPro; IPR000836; Pribosyltran.
DR   InterPro; IPR002375; Pur_pyr_pr_transf.
DR   Pfam; PF00156; Pribosyltran; 1.
DR   PROSITE; PS00103; PUR_PYR_PR_TRANSFER; 1.
KW   Transferase; Glycosyltransferase; Purine salvage; Complete proteome.
SQ   SEQUENCE   158 AA;  18064 MW;  2B40B2A98EAABF28 CRC64;
     MSEKYIVTWD MLQIHTRKLA NRLVKKIHSW NGIIAVSRGG LVPSALLARE LGLRCVDTVC
     IESYNYDCLK ENRKIIKKAE GNGEKIIVID DLVDTGGTAK IIRKLYPKAC FVTIFAKPMG
     RSLVDNYIID IPQNVWIEQP WDMSISYIPP LIQNYKIK
//