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TitleArchitecture of the yeast small subunit processome.
Journal, issue, pagesScience, Vol. 355, Issue 6321, Year 2017
Publish dateJan 13, 2017
AuthorsMalik Chaker-Margot / Jonas Barandun / Mirjam Hunziker / Sebastian Klinge /
PubMed AbstractThe small subunit (SSU) processome, a large ribonucleoprotein particle, organizes the assembly of the eukaryotic small ribosomal subunit by coordinating the folding, cleavage, and modification of ...The small subunit (SSU) processome, a large ribonucleoprotein particle, organizes the assembly of the eukaryotic small ribosomal subunit by coordinating the folding, cleavage, and modification of nascent pre-ribosomal RNA (rRNA). Here, we present the cryo-electron microscopy structure of the yeast SSU processome at 5.1-angstrom resolution. The structure reveals how large ribosome biogenesis complexes assist the 5' external transcribed spacer and U3 small nucleolar RNA in providing an intertwined RNA-protein assembly platform for the separate maturation of 18S rRNA domains. The strategic placement of a molecular motor at the center of the particle further suggests a mechanism for mediating conformational changes within this giant particle. This study provides a structural framework for a mechanistic understanding of eukaryotic ribosome assembly in the model organism Saccharomyces cerevisiae.
External linksScience / PubMed:27980088
MethodsEM (single particle)
Resolution5.1 Å
Structure data

8473

5tzs

EMDB-8473, PDB-5tzs:
Architecture of the yeast small subunit processome
Method: EM (single particle) / Resolution: 5.1 Å

Source
  • saccharomyces cerevisiae s288c (yeast)
KeywordsTRANSLATION / Ribosome assembly

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