JB Accepts, published online ahead of print on 5 October 2007
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J. Bacteriol. doi:10.1128/JB.01265-07
Copyright (c) 2007, American Society for Microbiology and/or the Listed Authors/Institutions. All Rights Reserved.

Expression of the {sigma}F-directed csfB Locus Prevents Premature Appearance of {sigma}G Activity during Sporulation of Bacillus subtilis

Vasant K. Chary, Panagiotis Xenopoulos, and Patrick J. Piggot*

Department of Microbiology and Immunology, Temple University School of Medicine, Philadelphia, Pennsylvania 19140

* To whom correspondence should be addressed. Email: piggotp{at}temple.edu.


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Abstract

During sporulation, {sigma}G becomes active in the prespore upon completion of engulfment. We show that inactivation of the {sigma}F-directed csfB locus resulted in premature activation of {sigma}G. CsfB exerted a distinct but overlapping control with LonA to prevent inappropriate {sigma}G activation. Artificial induction of csfB severely compromised spore formation.




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