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Journal of Bacteriology, June 2000, p. 3607-3611, Vol. 182, No. 12
0021-9193/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.

Septal Localization of the Membrane-Bound Division Proteins of Bacillus subtilis DivIB and DivIC Is Codependent Only at High Temperatures and Requires FtsZ

V. L. Katis,dagger R. G. Wake, and E. J. Harry*

Department of Biochemistry, University of Sydney, New South Wales 2006, Australia

Received 3 January 2000/Accepted 24 March 2000

Using immunofluorescence microscopy, we have examined the dependency of localization among three Bacillus subtilis division proteins, FtsZ, DivIB, and DivIC, to the division site. DivIC is required for DivIB localization. However, DivIC localization is dependent on DivIB only at high growth temperatures, at which DivIB is essential for division. FtsZ localization is required for septal recruitment of DivIB and DivIC, but FtsZ can be recruited independently of DivIB. These localization studies suggest a more specific role for DivIB in division, involving interaction with DivIC.

* Corresponding author. Mailing address: Department of Biochemistry, University of Sydney, Biochemistry Building G08, NSW, 2006, Australia. Phone: (61-2) 9351-6030. Fax: (61-2) 9351-4726. E-mail: L.Harry{at}biochem.usyd.edu.au.

dagger Present address: Research Institute of Molecular Pathology, A-1030, Vienna, Austria.

Journal of Bacteriology, June 2000, p. 3607-3611, Vol. 182, No. 12
0021-9193/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.


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