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Journal of Bacteriology, March 2003, p. 2005-2008, Vol. 185, No. 6
0021-9193/03/$08.00+0     DOI: 10.1128/JB.185.6.2005-2008.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.

The Membrane Domain of SpoIIIE Is Required for Membrane Fusion during Bacillus subtilis Sporulation

Division of Biological Sciences, University of California, San Diego, La Jolla, California 92093-0349

Received 2 August 2002/ Accepted 27 November 2002

During Bacillus subtilis sporulation, SpoIIIE is required for both postseptational chromosome segregation and membrane fusion after engulfment. Here we demonstrate that SpoIIIE must be present in the mother cell to promote membrane fusion and that the N-terminal membrane-spanning segments constitute a minimal membrane fusion domain, as well as direct septal localization.

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