How did bacterial ancestors reproduce? Lessons from L‐form cells and giant lipid vesicles

BioEssays - Tập 34 Số 12 - Trang 1078-1084 - 2012
Yves Briers1,2, Peter Walde3, Markus Schuppler2, Martin J. Loessner2
1Department of Biosystems, KU Leuven, Leuven, Belgium
2Institute of Food, Nutrition and Health, ETH Zurich, Zurich, Switzerland
3Department of Materials, ETH Zurich, Zurich, Switzerland

Tóm tắt

AbstractIn possible scenarios on the origin of life, protocells represent the precursors of the first living cells. To study such hypothetical protocells, giant vesicles are being widely used as a simple model. Lipid vesicles can undergo complex morphological changes enabling self‐reproduction such as growth, fission, and extra‐ and intravesicular budding. These properties of vesicular systems may in some way reflect the mechanism of reproduction used by protocells. Moreover, remarkable similarities exist between the morphological changes observed in giant vesicles and bacterial L‐form cells, which represent bacteria that have lost their rigid cell wall, but retain the ability to reproduce. L‐forms feature a dismantled cellular structure and are unable to carry out classical binary fission. We propose that the striking similarities in morphological transitions of L‐forms and giant lipid vesicles may provide insights into primitive reproductive mechanisms and contribute to a better understanding of the origin and evolution of mechanisms of cell reproduction.Editor's suggested further reading in BioEssays Synthesizing artificial cells from giant unilamellar vesicles: State‐of‐the art in the development of microfluidic technology Abstract

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BioEssays

Tập 34 Số 12

1078-1084

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