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Journal of Bacteriology, August 2007, p. 5642-5651, Vol. 189, No. 15
0021-9193/07/$08.00+0     doi:10.1128/JB.00467-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

The LysR-Type Transcriptional Regulator YofA Controls Cell Division through the Regulation of Expression of ftsW in Bacillus subtilis{triangledown}

Zuolei Lu, Michio Takeuchi, and Tsutomu Sato*

Department of Applied Biological Science, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan

Received 28 March 2007/ Accepted 18 May 2007

We have carried out a functional analysis of LysR family transcriptional regulators in Bacillus subtilis. The cell density of cultures of a yofA insertion mutant declined sharply after the end of exponential growth, as measured by optical density at 600 nm. Complementation in trans and analysis of isopropyl-ß-D-thiogalactopyranoside (IPTG)-dependent growth of an inducible yofA strain confirmed that YofA contributes to the cell density of a culture after the end of exponential growth. Microscopic observation suggested that cell division is inhibited or delayed in the yofA mutant during entry into stationary phase. Analysis of the transcription of cell division genes revealed that the expression of ftsW is inhibited in yofA mutants, and overexpression of yofA, driven by a multiple-copy plasmid, enhances the induction of ftsW expression. These results suggest that YofA is required for the final round of cell division before entry into stationary phase and that YofA positively regulates ftsW expression. The defects caused by mutation of yofA were suppressed in strains carrying Pspac-ftsW in the presence of IPTG. Furthermore, maximal expression of yofA was observed at the onset of stationary phase, which coincided with the maximal ftsW expression. Our data indicate that YofA is involved in cell division through positive regulation of the expression of ftsW in B. subtilis.

* Corresponding author. Mailing address: Department of Applied Biological Science, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan. Phone: 81-423-67-5706. Fax: 81-423-67-5706. E-mail: subtilis{at}cc.tuat.ac.jp

{triangledown} Published ahead of print on 25 May 2007.

Journal of Bacteriology, August 2007, p. 5642-5651, Vol. 189, No. 15
0021-9193/07/$08.00+0     doi:10.1128/JB.00467-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.



This article has been cited by other articles:

  • Maddocks, S. E., Oyston, P. C. F. (2008). Structure and function of the LysR-type transcriptional regulator (LTTR) family proteins. Microbiology 154: 3609-3623 [Abstract] [Full Text]  


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