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Journal of Bacteriology, December 2007, p. 8754-8757, Vol. 189, No. 23
0021-9193/07/$08.00+0     doi:10.1128/JB.01265-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

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

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

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

Received 6 August 2007/ Accepted 25 September 2007

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

* Corresponding author. Mailing address: Department of Microbiology and Immunology, Temple University School of Medicine, 3400 North Broad St., Philadelphia, PA 19140. Phone: (215) 707-7927. Fax: (215) 707-7788. E-mail: piggotp{at}temple.edu

{triangledown} Published ahead of print on 5 October 2007.

Journal of Bacteriology, December 2007, p. 8754-8757, Vol. 189, No. 23
0021-9193/07/$08.00+0     doi:10.1128/JB.01265-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.



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