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- W2028931639 abstract "Summary Coxiella burnetii , a Gram‐negative obligate intracellular pathogen, replicates within an parasitophorous vacuole with lysosomal characteristics. To understand how C. burnetii maintains genomic integrity in this environment, a database search for genes involved in DNA repair was performed. Major components of repair, SOS response and recombination were identified, including recA and ruvABC , but lexA and recBCD were absent. Instead, C. burnetii possesses addAB orthologous genes, functional equivalents to recBCD . Survival after treatment with UV, mitomycin C (MC) or methyl methanesulfonate (MMS), as well as homologous recombination in Hfr mating was restored in Escherichia coli deletion strains by C. burnetii recA or addAB . Despite the absence of LexA, co‐protease activity for C. burnetii RecA was demonstrated. Dominant‐negative inhibition of C. burnetii RecA by recA mutant alleles, modelled after E. coli recA1 and recA56 , was observed and more apparent with expression of C. burnetii RecAG159D mutant protein. Expression of a subset of repair genes in C. burnetii was monitored and, in contrast to the non‐inducible E. coli recBCD , addAB expression was strongly upregulated under oxidative stress. Constitutive SOS gene expression due to the lack of LexA and induction of AddAB likely reflect a unique repair adaptation of C. burnetii to its hostile niche." @default.
- W2028931639 created "2016-06-24" @default.
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- W2028931639 date "2008-08-21" @default.
- W2028931639 modified "2023-09-30" @default.
- W2028931639 title "Constitutive SOS expression and damage-inducible AddAB-mediated recombinational repair systems for<i>Coxiella burnetii</i>as potential adaptations for survival within macrophages" @default.
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- W2028931639 doi "https://doi.org/10.1111/j.1365-2958.2008.06373.x" @default.
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