Non-homologous end joining pathway of the human pathogen Cryptococcus neoformans influences homologous integration efficiency but not virulence

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  • Non-homologous end joining pathway of the human pathogen <i>Cryptococcus neoformans</i> influences homologous integration efficiency but not virulence

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<p>The efficiency of gene targeting by integration through homologous recombination (homologous integration, HI) in the human pathogen Cryptococcus neoformans remains unsatisfactory. In order to achieve a much more efficient gene targeting system in C. neoformans, a new double knockout strain in genes involved in the nonhomologous end joining (NHEJ) pathway was constructed. HI frequency was elevated by as much as approximately fivefold in the single or double knockout strains in NHEJ genes, and the frequency depended on the gene targeted. None of the NHEJ gene knockouts showed significant differences in regular growth, sensitivity to DNA-damaging drugs or UV, and virulence compared to the wild-type control, suggesting that the NHEJ pathway does not play a significant role in these biological stresses in C. neoformans. It was also suggested that the genes analyzed in this study are components of a single NHEJ pathway, as the mutants (including the double mutant) displayed the same phenotypes.</p>

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  • Mycoscience

    Mycoscience 51 (4), 272-280, 2010

    一般社団法人 日本菌学会

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