gyrB介导的染色体结构变化对紫外线杀灭大肠杆菌的影响：对脱氧核糖核酸修复能力不同的菌株进行的实验
Effect of gyrB-mediated changes in chromosome structure on killing of Escherichia coli by ultraviolet light: experiments with strains differing in deoxyribonucleic acid repair capacity.
作者信息
von Wright A, Bridges B A
出版信息
J Bacteriol. 1981 Apr;146(1):18-23. doi: 10.1128/jb.146.1.18-23.1981.
Abstract
Mutations at the gyrB locus were found to decrease the degree of supercoiling of the Escherichia coli chromosome. The effect of a gyrB mutation on the repair of ultraviolet-induced deoxyribonucleic acid damage was studied by following the killing of strains of E. coli K-12 proficient and deficient in deoxyribonucleic acid repair. The effectiveness of both excision and postreplication types of deoxyribonucleic acid repair was found to be altered by this mutation, the former being apparently enhanced and the latter impaired.
摘要
研究发现，gyrB位点的突变会降低大肠杆菌染色体的超螺旋程度。通过追踪DNA修复能力正常和缺陷的大肠杆菌K-12菌株的存活率，研究了gyrB突变对紫外线诱导的DNA损伤修复的影响。结果发现，这种突变改变了切除修复和复制后修复两种类型的DNA修复的有效性，前者明显增强，后者受损。
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