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噬菌体λ和P22编码的功能对大肠杆菌中recF依赖性重组的激活作用。

Activation of recF-dependent recombination in Escherichia coli by bacteriophage lambda- and P22-encoded functions.

作者信息

Poteete A R, Volkert M R

机构信息

Department of Molecular Genetics and Microbiology, University of Massachusetts, Worcester 01655.

出版信息

J Bacteriol. 1988 Sep;170(9):4379-81. doi: 10.1128/jb.170.9.4379-4381.1988.

Abstract

Escherichia coli strains bearing wild-type and mutant alleles of various recombination genes, as well as plasmids that express recombination-related genes of bacteriophages lambda and P22, were tested for their proficiency as recipients in Hfr-mediated conjugation. It was found that the homologous recombination systems of both phages could promote recombination in a recB recC mutant host. In addition, the Abc function of P22, but not the Gam function of lambda, was found to inhibit recombination in a wild-type host; however, both Abc and Gam inhibited recombination in a recF mutant host. These observations are interpreted as indicating that the recombination systems of both phages, as well as the RecBCD-modulating functions Abc and Gam, all activate the RecF recombination pathway of E. coli.

摘要

对携带各种重组基因野生型和突变等位基因的大肠杆菌菌株,以及表达噬菌体λ和P22重组相关基因的质粒,进行了Hfr介导的接合中作为受体菌的能力测试。结果发现,两种噬菌体的同源重组系统均可在recB recC突变宿主中促进重组。此外,发现P22的Abc功能而非λ的Gam功能可在野生型宿主中抑制重组;然而,Abc和Gam在recF突变宿主中均抑制重组。这些观察结果被解释为表明两种噬菌体的重组系统以及RecBCD调节功能Abc和Gam均激活了大肠杆菌的RecF重组途径。

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