期刊
MICROBIOLOGY-SGM
卷 151, 期 -, 页码 1751-1759出版社
SOC GENERAL MICROBIOLOGY
DOI: 10.1099/mic.0.27803-0
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- NIGMS NIH HHS [GM46700] Funding Source: Medline
The Bacillus subtilis AbrB protein is a DNA-binding global regulator of a plethora of functions that are expressed during the transition from exponential growth to stationary phase and under suboptimal growth conditions. AbrB orthologues have been identified in a variety of prokaryotic organisms, notably in all species of Bacillus, Clostridium and Listeria that have been examined. Based on amino acid sequence identity in the N-terminal domains of the orthologues from B. subtilis and Bacillus anthracis, it was predicted that the proteins might display identical DNA-binding specificities. The binding of purified B. anthracis AbrB (AbrB(BA)) and purified B. subtilis AbrB (AbrB(BS)) at DNA targets of B. subtilis, B. anthracis and a synthetic origin was compared. In all cases examined, DNA-binding specificity was identical as judged by DNase I footprinting. In B. subtilis cells, the B. anthracis promoters from the atxA and abrB genes were regulated by AbrB(BS), and the B. subtilis promoter from the yxbB operon was regulated by AbrB(BA).
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