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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Interspecific recombination between Escherichia coli and Salmonella typhimurium occurs by the RecABCD pathway.

Interspecific recombination in conjugation between Escherichia coli and Salmonella typhimurium is several orders of magnitude lower than intraspecies recombination and is dependent on the RecA function. This low efficiency is due to a 20% divergence in the DNA sequence. The methyl-directed (mut H,L,S dependent) mismatch repair system appears to control the fidelity of homologous recombination; inactivating one of the Mut functions increases the interspecies recombination at least by 10(3)-fold. The interspecific recombination in mutS or mutL mutants is only approximately 10-fold lower than recombination in homospecific crosses as found after correction for the efficiency of mating and DNA transfer by zygotic induction experiments. The interspecific recombination is dependent on the RecABCD pathway: it was abolished in a recA mutant and decreased approximately 10(3)-fold in a recC mutant.[1]

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