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Regeneration of Escherichia coli Giant Protoplasts to Their Original Form

Department of Applied Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
Authors to whom correspondence should be addressed.
Received: 4 February 2019 / Revised: 23 February 2019 / Accepted: 24 February 2019 / Published: 1 March 2019
(This article belongs to the Special Issue Approaches toward Artificial Cell Construction and Applications)
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The spheroplasts and protoplasts of cell wall-deficient (CWD) bacteria are able to revert to their original cellular morphologies through the regeneration of their cell walls. However, whether this is true for giant protoplasts (GPs), which can be as large as 10 μm in diameter, is unknown. GPs can be prepared from various bacteria, including Escherichia coli and Bacillus subtilis, and also from fungi, through culture in the presence of inhibitors for cell wall synthesis or mitosis. In this report, we prepared GPs from E. coli and showed that they can return to rod-shaped bacterium, and that they are capable of colony formation. Microscopic investigation revealed that the regeneration process took place through a variety of morphological pathways. We also report the relationship between GP division and GP volume. Finally, we show that FtsZ is crucial for GP division. These results indicate that E. coli is a highly robust organism that can regenerate its original form from an irregular state, such as GP. View Full-Text
Keywords: giant protoplast; Escherichia coli; proliferation; cell wall-deficient bacteria giant protoplast; Escherichia coli; proliferation; cell wall-deficient bacteria

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Tabata, K.V.; Sogo, T.; Moriizumi, Y.; Noji, H. Regeneration of Escherichia coli Giant Protoplasts to Their Original Form. Life 2019, 9, 24.

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