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Significance The cell envelope of the extremophile bacterium Deinococcus radiodurans was studied by cryo-electron microscopy and described with unprecedented detail. In this bacterium, the outermost cell envelope layer, named surface… Click to show full abstract
Significance The cell envelope of the extremophile bacterium Deinococcus radiodurans was studied by cryo-electron microscopy and described with unprecedented detail. In this bacterium, the outermost cell envelope layer, named surface layer, is characterized by a highly regular tiling of proteins extending their crystalline organization to the cell envelope layers below (until the inner membrane). The study shows three main protein complexes, with masses in the MDa range, regularly organized into an astonishing geometrical regularity. The observed organization contributes to protecting the cell against environmental stressors and maintaining an efficient permeation of environmental solutes.
Journal Title: Proceedings of the National Academy of Sciences of the United States of America
Year Published: 2022
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