Crystal Structure of the Yeast Orthologue of RACK1, Asc1.

Experimental Data Snapshot

  • Resolution: 2.13 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.196 

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Direct link between RACK1 function and localization at the ribosome in vivo

Coyle, S.M.Gilbert, W.V.Doudna, J.A.

(2009) Mol Cell Biol 29: 1626-1634

  • DOI: https://doi.org/10.1128/MCB.01718-08
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The receptor for activated C-kinase (RACK1), a conserved protein implicated in numerous signaling pathways, is a stoichiometric component of eukaryotic ribosomes located on the head of the 40S ribosomal subunit. To test the hypothesis that ribosome association is central to the function of RACK1 in vivo, we determined the 2.1-A crystal structure of RACK1 from Saccharomyces cerevisiae (Asc1p) and used it to design eight mutant versions of RACK1 to assess roles in ribosome binding and in vivo function. Conserved charged amino acids on one side of the beta-propeller structure were found to confer most of the 40S subunit binding affinity, whereas an adjacent conserved and structured loop had little effect on RACK1-ribosome association. Yeast mutations that confer moderate to strong defects in ribosome binding mimic some phenotypes of a RACK1 deletion strain, including increased sensitivity to drugs affecting cell wall biosynthesis and translation elongation. Furthermore, disruption of RACK1's position at the 40S ribosomal subunit results in the failure of the mRNA binding protein Scp160 to associate with actively translating ribosomes. These results provide the first direct evidence that RACK1 functions from the ribosome, implying a physical link between the eukaryotic ribosome and cell signaling pathways in vivo.

  • Organizational Affiliation

    Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein subunit beta-like protein
A, B, C, D
319Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: ASC1CPC2YM9718.15CYMR116C
Find proteins for P38011 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P38011 
Go to UniProtKB:  P38011
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP38011
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.13 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.196 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 168.66α = 90
b = 85.41β = 134.8
c = 119.1γ = 90
Software Package:
Software NamePurpose
BOSdata collection
XDSdata reduction
XSCALEdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-02-17
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance