Beck C F, Ingraham J L, Neuhard J, Thomassen E
J Bacteriol. 1972 Apr;110(1):219-28. doi: 10.1128/jb.110.1.219-228.1972.
The pathways by which uracil, cytosine, uridine, cytidine, deoxyuridine, and deoxycytidine are metabolized by Salmonella typhimurium are established. The various 5-fluoropyrimidine analogues are shown to exert their toxic effects only after having been converted to the nucleotide level, and these conversions are shown to be catalyzed by the same enzymes which similarly convert the natural substrates. Methods for isolating mutant strains blocked in various steps of metabolism of pyrimidine bases and nucleosides are described.
鼠伤寒沙门氏菌代谢尿嘧啶、胞嘧啶、尿苷、胞苷、脱氧尿苷和脱氧胞苷的途径已明确。各种5-氟嘧啶类似物只有在转化为核苷酸水平后才会发挥其毒性作用,并且这些转化过程是由与天然底物类似转化过程相同的酶催化的。本文描述了分离嘧啶碱基和核苷代谢各步骤受阻的突变菌株的方法。