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TitleArchitecture and modular assembly of S-layers revealed by electron cryotomography.
Journal, issue, pagesProc Natl Acad Sci U S A, Vol. 116, Issue 50, Page 25278-25286, Year 2019
Publish dateDec 10, 2019
AuthorsLavinia Gambelli / Benjamin H Meyer / Mathew McLaren / Kelly Sanders / Tessa E F Quax / Vicki A M Gold / Sonja-Verena Albers / Bertram Daum /
PubMed AbstractSurface protein layers (S-layers) often form the only structural component of the archaeal cell wall and are therefore important for cell survival. S-layers have a plethora of cellular functions ...Surface protein layers (S-layers) often form the only structural component of the archaeal cell wall and are therefore important for cell survival. S-layers have a plethora of cellular functions including maintenance of cell shape, osmotic, and mechanical stability, the formation of a semipermeable protective barrier around the cell, and cell-cell interaction, as well as surface adhesion. Despite the central importance of S-layers for archaeal life, their 3-dimensional (3D) architecture is still poorly understood. Here we present detailed 3D electron cryomicroscopy maps of archaeal S-layers from 3 different strains. We were able to pinpoint the positions and determine the structure of the 2 subunits SlaA and SlaB. We also present a model describing the assembly of the mature S-layer.
External linksProc Natl Acad Sci U S A / PubMed:31767763 / PubMed Central
MethodsEM (subtomogram averaging)
Resolution16.0 - 56.0 Å
Structure data

EMDB-10444:
Sub-tomogram average of the Sulfolobus acidocaldarius S-layer
Method: EM (subtomogram averaging) / Resolution: 23.0 Å

EMDB-10445:
Sub-tomogram average of the Sulfolobus solfataricus S-layer
Method: EM (subtomogram averaging) / Resolution: 16.0 Å

EMDB-10459:
Sub-tomogram average of the Sulfolobus islandicus S-layer in situ
Method: EM (subtomogram averaging) / Resolution: 40.0 Å

EMDB-10460:
Sub-tomogram average of the Sulfolobus acidocaldarius S-layer in situ
Method: EM (subtomogram averaging) / Resolution: 56.0 Å

Source
  • Sulfolobus acidocaldarius (acidophilic)
  • Sulfolobus islandicus (archaea)

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