Bacillus anthracis Virulence Regulator AtxA Binds Specifically to the pagA Promoter Region | Zendy

Rita M. McCall | Zendy; Mary E. Sievers | Zendy; Rasem J. Fattah | Zendy; Rodolfo Ghirlando | Zendy; Andrei P. Pomerantsev | Zendy; Stephen H. Leppla | Zendy

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Bacillus anthracis Virulence Regulator AtxA Binds Specifically to the pagA Promoter Region

Author(s) -

Rita M. McCall,

Mary E. Sievers,

Rasem J. Fattah,

Rodolfo Ghirlando,

Andrei P. Pomerantsev,

Stephen H. Leppla

Publication year - 2019

Publication title -

journal of bacteriology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.652

H-Index - 246

eISSN - 1067-8832

pISSN - 0021-9193

DOI - 10.1128/jb.00569-19

Subject(s) - biology , bacillus anthracis , virulence , regulator , bacterial protein , microbiology and biotechnology , promoter , bacillus (shape) , escherichia coli proteins , genetics , bacteria , gene , gene expression

Anthrax toxin activator (AtxA) regulates the major virulence genes inBacillus anthracis . The bacterium produces the anthrax toxins, and understanding the mechanism of toxin production may facilitate the development of therapeutics forB. anthracis infection. Since the discovery of AtxA 25 years ago, the mechanism by which it regulates its targets has largely remained a mystery. Here, we provide evidence that AtxA binds to the promoter region of thepagA gene encoding the main central protective antigen (PA) component of the anthrax toxin. These data suggest that AtxA binding plays a direct role in gene regulation. Our work also assists in clarifying the role of CO2 in AtxA’s gene regulation and provides more evidence for the role of AtxA phosphorylation in virulence gene regulation.

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