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Journal of Bacteriology, August 2003, p. 4615-4619, Vol. 185, No. 15
0021-9193/03/$08.00+0     DOI: 10.1128/JB.185.15.4615-4619.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.

Analysis of the Interaction between the Transcription Factor {sigma}G and the Anti-Sigma Factor SpoIIAB of Bacillus subtilis

Louise Evans,1 Joanna Clarkson,2 Michael D. Yudkin,2 Jeff Errington,1 and Andrea Feucht1*

Sir William Dunn School of Pathology Microbiology Unit, Department of Biochemistry, University of Oxford, Oxford OX1 3RE, United Kingdom

Received 14 February 2003/ Accepted 1 May 2003

The activation of {sigma}G, a transcription factor, in Bacillus subtilis is coupled to the completion of engulfment during sporulation. SpoIIAB, an anti-sigma factor involved in regulation of {sigma}F, is also shown to form a complex with {sigma}G in vitro. SpoIIAA, the corresponding anti-anti-sigma factor, can disrupt the SpoIIAB:{sigma}G complex, releasing free {sigma}G. The data suggest the existence of an as-yet-unknown mechanism to keep {sigma}G inactive prior to engulfment.

* Corresponding author. Mailing address: Sir William Dunn School of Pathology, University of Oxford, Oxford OX1 3RE, United Kingdom. Phone: 44 (0) 1865 275552. Fax: 44 (0) 1865 275556. E-mail: feucht{at}pathology.oxford.ac.uk.

Journal of Bacteriology, August 2003, p. 4615-4619, Vol. 185, No. 15
0021-9193/03/$08.00+0     DOI: 10.1128/JB.185.15.4615-4619.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.



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