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Journal of Bacteriology, April 2008, p. 2633-2636, Vol. 190, No. 7
0021-9193/08/$08.00+0     doi:10.1128/JB.01859-07
Copyright © 2008, American Society for Microbiology. All Rights Reserved.

A Viable Bacillus subtilis Strain without Functional Extracytoplasmic Function Sigma Genes{triangledown}

Kei Asai, Keisuke Ishiwata, Kunihiko Matsuzaki, and Yoshito Sadaie*

Department of Molecular Biology, Faculty of Science, Saitama University, 255 Shimo-Okubo, Sakura-ku, Saitama City 338-8570, Japan

Received 27 November 2007/ Accepted 10 January 2008

We constructed a Bacillus subtilis Marburg strain that harbors deletion mutations in all seven extracytoplasmic function (ECF) sigma genes. The strain shows wild-type growth at 37°C both in a complex and in a synthetic medium and exhibits wild-type sporulation. ECF sigma genes of B. subtilis are dispensable as long as no stress is imposed, although they seem to be required for quick response to stresses.

* Corresponding author. Mailing address: Department of Biochemistry and Molecular Biology, Faculty of Science, Saitama University, Saitama 338-8570, Japan. Phone: 81 (48) 858 3399. Fax: 81 (48) 858 3384. E-mail: ysadaie{at}mail.saitama-u.ac.jp

{triangledown} Published ahead of print on 25 January 2008.

Journal of Bacteriology, April 2008, p. 2633-2636, Vol. 190, No. 7
0021-9193/08/$08.00+0     doi:10.1128/JB.01859-07
Copyright © 2008, American Society for Microbiology. All Rights Reserved.





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