Suppr超能文献

DNA 回旋酶 B 亚基的拮抗作用可使大肠杆菌中的质粒 pBR322 和 pMG110 消除。

Antagonism of the B subunit of DNA gyrase eliminates plasmids pBR322 and pMG110 from Escherichia coli.

作者信息

Wolfson J S, Hooper D C, Swartz M N, McHugh G L

出版信息

J Bacteriol. 1982 Oct;152(1):338-44. doi: 10.1128/jb.152.1.338-344.1982.

Abstract

The constructed plasmid pBR322 and the native plasmid pMG110 were eliminated (cured) from growing Escherichia coli cells by the antagonism of the B subunit of the bacterial enzyme DNA gyrase. The antagonism may be by the growth of cells (i) at semipermissive temperatures in a bacterial mutant containing a thermolabile gyrase B subunit or (ii) at semipermissive concentrations of coumermycin A1, an antibiotic that specifically inhibits the B subunit of DNA gyrase. The kinetics of plasmid elimination indicate that plasmid loss occurs too rapidly to be explained solely by the faster growth of that plasmid-free bacteria and, therefore, represents interference with plasmid maintenance.

摘要

通过细菌酶DNA促旋酶B亚基的拮抗作用,从生长的大肠杆菌细胞中消除(治愈)构建的质粒pBR322和天然质粒pMG110。这种拮抗作用可能是通过以下方式实现的:(i)在含有热不稳定促旋酶B亚基的细菌突变体中,于半允许温度下培养细胞;(ii)在香豆霉素A1(一种特异性抑制DNA促旋酶B亚基的抗生素)的半允许浓度下培养细胞。质粒消除的动力学表明,质粒丢失发生得太快,无法仅用无质粒细菌的更快生长来解释,因此,这代表了对质粒维持的干扰。

相似文献

5

引用本文的文献

本文引用的文献

6
8
DNA topoisomerases.DNA拓扑异构酶
Annu Rev Biochem. 1981;50:879-910. doi: 10.1146/annurev.bi.50.070181.004311.

文献检索

告别复杂PubMed语法,用中文像聊天一样搜索,搜遍4000万医学文献。AI智能推荐,让科研检索更轻松。

立即免费搜索

文件翻译

保留排版,准确专业,支持PDF/Word/PPT等文件格式,支持 12+语言互译。

免费翻译文档

深度研究

AI帮你快速写综述,25分钟生成高质量综述,智能提取关键信息,辅助科研写作。

立即免费体验