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Related Experiment Videos

ER dislocation: Cdc48p/p97 gets into the AAAct.

J Michael Lord1, Aldo Ceriotti, Lynne M Roberts

  • 1Department of Biological Sciences, University of Warwick, CV4 7AL, Coventry, UK.

Current Biology : CB
|March 8, 2002
PubMed
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Misfolded proteins in the endoplasmic reticulum are degraded via cytosol export. A complex involving the AAA ATPase Cdc48p/p97 is crucial for this protein degradation pathway.

Area of Science:

  • Cellular Biology
  • Protein Degradation
  • Endoplasmic Reticulum Quality Control

Background:

  • Misfolded or unassembled proteins accumulate in the endoplasmic reticulum (ER) lumen.
  • Proper protein folding and assembly are vital for cellular function.
  • Unresolved protein aggregation can lead to cellular stress and disease.

Purpose of the Study:

  • To investigate the role of protein export from the ER to the cytosol.
  • To elucidate the mechanism of degradation for misfolded ER proteins.
  • To identify key molecular players in the ER-associated degradation (ERAD) pathway.

Main Methods:

  • Studied protein trafficking from the ER lumen to the cytosol.
  • Investigated the function of the AAA ATPase Cdc48p/p97 complex.

Related Experiment Videos

  • Utilized biochemical and genetic approaches to analyze protein degradation.

    • Main Results:

    • Confirmed that misfolded proteins are exported from the ER lumen to the cytosol.
    • Demonstrated the involvement of the Cdc48p/p97 complex in this export process.
    • Provided evidence for the degradation of exported proteins in the cytosol.

    Conclusions:

    • The AAA ATPase Cdc48p/p97 complex is essential for the retro-translocation of misfolded ER proteins.
    • This export to the cytosol precedes the ultimate degradation of aberrant proteins.
    • Understanding this pathway is critical for ER quality control mechanisms.