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Journal of Bacteriology, March 2000, p. 1419-1422, Vol. 182, No. 5
0021-9193/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.

Effects of Calcium and Calcium Chelators on Growth and Morphology of Escherichia coli L-Form NC-7

T. Onoda,1 J. Enokizono,1 H. Kaya,1 A. Oshima,1,* P. Freestone,2 and V. Norris3

Department of Biological Science, Faculty of Life and Environmental Science, Shimane University, Matsue 690, Japan1; Department of Microbiology and Immunology, University of Leicester, Leicester LE1 9HN, United Kingdom2; and IFR `Systèmes Intégrés', Laboratoire de Microbiologie, Faculte des Sciences et Techniques de Rouen, F76821 Mont Saint Aignan Cedex, France3

Received 19 July 1999/Accepted 18 November 1999

Growth of a wall-less, L-form of Escherichia coli specifically requires calcium, and in its absence, cells ceased dividing, became spherical, swelled, developed large vacuoles, and eventually lysed. The key cell division protein, FtsZ, was present in the L-form at a concentration five times less than that in the parental strain. One interpretation of these results is that the L-form possesses an enzoskeleton partly regulated by calcium.

* Corresponding author. Mailing address: Department of Biological Science, Faculty of Life and Environmental Science, Shimane University, Matsue 690-0823, Japan. Phone: 81 852 32 6443. Fax: 81 852 32 6449. E-mail: oshima{at}life.shimane-u.ac.jp.

Journal of Bacteriology, March 2000, p. 1419-1422, Vol. 182, No. 5
0021-9193/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.


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