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Mysterious hexagonal pyramids on the surface of Pyrobaculum cells

Abstract : In attempts to induce putative temperate viruses, we UV-irradiated cells of the hyperthermophilic archaeon Pyrobaculum oguniense. Virus replication could not be detected; however, we observed the development of pyramidal structures with 6-fold symmetry on the cell surface. The hexagonal basis of the pyramids was continuous with the cellular cytoplasmic membrane and apparently grew via the gradual expansion of the 6 triangular lateral faces, ultimately protruding through the S-layer. When the base of these isosceles triangles reached approximately 200 nm in length, the pyramids opened like flower petals. The origin and function of these mysterious nanostructures remain unknown.
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https://hal-pasteur.archives-ouvertes.fr/pasteur-01977385
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Submitted on : Thursday, January 10, 2019 - 4:55:27 PM
Last modification on : Wednesday, April 29, 2020 - 2:14:16 PM

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Elena Rensen, Mart Krupovic, David Prangishvili. Mysterious hexagonal pyramids on the surface of Pyrobaculum cells. Biochimie, Elsevier, 2015, 118, pp.365-367. ⟨10.1016/j.biochi.2015.06.007⟩. ⟨pasteur-01977385⟩

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