Mullinix K P, Rosenkranz H S
J Bacteriol. 1971 Feb;105(2):565-72. doi: 10.1128/jb.105.2.565-572.1971.
Bacteria (Escherichia coli) can recover from the lethal action of N-hydroxyurethan when they are incubated in drug-free liquid medium. This recovery, which is dependent upon energy metabolism, does not occur on solid medium. Recovery is accompanied by repair of the cellular deoxyribonucleic acid (DNA). A bacterial mutant deficient in DNA polymerase was extremely sensitive to the lethal action of hydroxyurethan. Data are presented which support the concept that DNA replication and DNA repair are mediated by different enzymes and that only the former process is inhibited by hydroxyurea.
细菌(大肠杆菌)在不含药物的液体培养基中培养时,能够从N - 羟基脲的致死作用中恢复。这种依赖于能量代谢的恢复在固体培养基上不会发生。恢复过程伴随着细胞脱氧核糖核酸(DNA)的修复。一种缺乏DNA聚合酶的细菌突变体对羟基脲的致死作用极为敏感。所呈现的数据支持这样的概念,即DNA复制和DNA修复由不同的酶介导,并且只有前者的过程会被羟基脲抑制。