title: Phosphorolysis of 5-fluoro-2'-deoxyuridine in Escherichia coli and its inhibition by nucleosides.
abstract: The effect of ribonucleosides and deoxyribonucleosides on the phosphorolysis of 5-fluoro-2'-deoxyuridine (FUdR) was examined in cells of Escherichia coli. All nucleosides tested except guanosine and deoxyguanosine inhibited phosphorolysis. By using genetically marked strains it was found that in vivo FUdR is a specific substrate of thymidine phosphorylase.
mesh_terms: D003470:Culture Media; D003853:Deoxyribonucleosides / Q000494:pharmacology; D004926:Escherichia coli / Q000201:enzymology / Q000254:growth & development / Q000378:metabolism*; D005467:Floxuridine / Q000378:metabolism*; D009705:Nucleosides / Q000494:pharmacology*; D010430:Pentosyltransferases / Q000037:antagonists & inhibitors / Q000378:metabolism; D012263:Ribonucleosides / Q000494:pharmacology; D013936:Thymidine / Q000378:metabolism; D014316:Tritium; D014529:Uridine / Q000378:metabolism
chemical_list: D003470:Culture Media; D003853:Deoxyribonucleosides; D009705:Nucleosides; D012263:Ribonucleosides; D005467:Floxuridine; D014316:Tritium; D010430:Pentosyltransferases; D013936:Thymidine; D014529:Uridine