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• W2939060314 endingPage "e6718" @default.
• W2939060314 startingPage "e6718" @default.
• W2939060314 abstract "The anthrax toxin is a virulence factor produced by the bacterium Bacillus anthracis . Transcription of anthrax toxin genes is controlled by the transcription factor AtxA. Thus, AtxA is thought to be a key factor for the pathogenicity of B. anthracis . Despite its important role in B. anthracis infection, the molecular mechanism by which AtxA controls expression of anthrax toxin remains unclear. This study aimed to characterize the molecular mechanism of AtxA-mediated regulation of protective antigen (PA), a component of anthrax toxin encoded by the pagA gene. First, the interaction between the upstream region of pagA and AtxA was evaluated in vivo by constructing a transcriptional fusion of the upstream region with an auxotrophic marker. The results showed that (i) the upstream region of pagA suppressed transcription of the downstream gene and (ii) AtxA recovered suppressed transcription. Second, in vitro analysis using a gel mobility shift assay was performed to evaluate binding specificity of the AtxA–DNA interaction. The result showed sequence-independent binding of AtxA to DNA. Taken together, our findings suggest that the expression of PA was suppressed by the upstream region of pagA and that an interaction of AtxA and the upstream region releases the suppression." @default.
• W2939060314 created "2019-04-25" @default.
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• W2939060314 date "2019-04-12" @default.
• W2939060314 modified "2023-09-23" @default.
• W2939060314 title "Upstream sequence-dependent suppression and AtxA-dependent activation of protective antigens in<i>Bacillus anthracis</i>" @default.
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• W2939060314 doi "https://doi.org/10.7717/peerj.6718" @default.
• W2939060314 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6463858" @default.
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• W2939060314 hasPublicationYear "2019" @default.
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