...
首页> 外文期刊>Journal of bacteriology >Isolation of temperature-sensitive McrA and McrB mutations and complementation analysis of the McrBC region of Escherichia coli K-12.
【24h】

Isolation of temperature-sensitive McrA and McrB mutations and complementation analysis of the McrBC region of Escherichia coli K-12.

机译:对温度敏感的McrA和McrB突变的分离以及大肠杆菌K-12的McrBC区的互补分析。

获取原文
   

获取外文期刊封面封底 >>

       

摘要

We isolated temperature-sensitive mcrA and mcrBC mutants of Escherichia coli. At 42 degrees C, they were unable to restrict the T-even bacteriophages T6gt and T4gt or plasmids encoding cloned DNA methylase genes whose specificities confer sensitivity to the McrA and McrBC nucleases. Complementation analysis of the McrBC region (mcrB251) with the complete cloned McrBC system or a derivative with mcrB alone indicated that the mutation shows an absolute defect for the restriction of DNA containing hydroxymethylcytosine and a thermosensitive defect for the restriction of DNA containing methylcytosine. The properties of the McrA temperature-sensitive mutants suggest that some of these mutations can also influence the restriction of DNA containing hydroxymethylcytosine or methylcytosine residues.
机译:我们分离了大肠杆菌的温度敏感mcrA和mcrBC突变体。在42摄氏度时,他们无法限制T-even噬菌体T6gt和T4gt或编码克隆的DNA甲基化酶基因的质粒,其特异性赋予对McrA和McrBC核酸酶敏感性。用完全克隆的McrBC系统或仅含mcrB的衍生物对McrBC区(mcrB251)进行的互补分析表明,该突变显示出对限制含有羟甲基胞嘧啶的DNA的绝对缺陷,以及对限制对含有甲基胞嘧啶的DNA的热敏缺陷。 McrA温度敏感突变体的特性表明,这些突变中的一些也可以影响对含有羟甲基胞嘧啶或甲基胞嘧啶残基的DNA的限制。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号