[Reactivation of ultraviolet-irradiated phage lambda and recombination in Escherichia coli K-12 cells containing plasmid ColIb-P9].
It was shown that the presence of colicinogenis plasmid ColIb-P9 increased the survival of UV-irradiated bacteriophage lambda cI857 in non-irradiated cells of Escherichia coli K-12. The effect of this plasmid was retained in the polA and recB mutants, being sharply reduced in the uvrA and recB recC sbcB recF mutants. This effect strongly depended on recA+ and lexA+ genotype. The W-reactivation efficiency was slightly higher in the cells containing ColIb-P9 than in those lacking the plasmid. No significant effect of the plasmid on recombination during transduction, after conjugation under usual conditions and in the case when a conjugation mixture or recipient cells were irradiated, was observed. The data demonstrate that the effect of ColIb-P9 plasmid on DNA repair is not mediated by its influence on recombination.
D010582:Bacteriophage lambda / Q000235:genetics / Q000528:radiation effects*; D003227:Conjugation, Genetic / Q000528:radiation effects; D004260:DNA Repair / Q000528:radiation effects; D004269:DNA, Bacterial / Q000528:radiation effects; D004926:Escherichia coli / Q000235:genetics / Q000528:radiation effects*; D010957:Plasmids / Q000528:radiation effects*; D011995:Recombination, Genetic / Q000528:radiation effects*; D014161:Transduction, Genetic / Q000528:radiation effects; D014466:Ultraviolet Rays
D004269:DNA, Bacterial
Reaktivatsiia obluchennogo ul'trafioletom faga lambda i rekombinatsiia v kletkakh Escherichia coli K-12, soderzhashchikh plazmidy ColIb-P9.