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TitleCartwheel architecture of Trichonympha basal body.
Journal, issue, pagesScience, Vol. 337, Issue 6094, Page 553, Year 2012
Publish dateAug 3, 2012
AuthorsPaul Guichard / Ambroise Desfosses / Aditi Maheshwari / Virginie Hachet / Carsten Dietrich / Andreas Brune / Takashi Ishikawa / Carsten Sachse / Pierre Gönczy /
PubMed AbstractCentrioles and basal bodies are essential for the formation of cilia, flagella, and centrosomes. They exhibit a characteristic ninefold symmetry imparted by a cartwheel thought to contain rings of ...Centrioles and basal bodies are essential for the formation of cilia, flagella, and centrosomes. They exhibit a characteristic ninefold symmetry imparted by a cartwheel thought to contain rings of SAS-6 proteins. We used cryoelectron tomography to investigate the architecture of the exceptionally long cartwheel of the flagellate Trichonympha. We found that the cartwheel is a stack of central rings that exhibit a vertical periodicity of 8.5 nanometers and is able to accommodate nine SAS-6 homodimers. The spokes that emanate from two such rings associate into a layer, with a vertical periodicity of 17 nanometers on the cartwheel margin. Thus, by using the power of biodiversity, we unveiled the architecture of the cartwheel at the root of the ninefold symmetry of centrioles and basal bodies.
External linksScience / PubMed:22798403
MethodsEM (subtomogram averaging)
Resolution45.0 Å
Structure data

EMDB-2094:
Central hub structure of Trichonympha cartwheel
Method: EM (subtomogram averaging) / Resolution: 45.0 Å

Source
  • Trichonympha (eukaryote)

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