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The Cdc48 machine in endoplasmic reticulum associated protein degradation
Dieter H Wolf1, Alexandra Stolz
1Institut für Biochemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany. dieter.wolf@ibc.uni-stuttgart.de
Biochimica Et Biophysica Acta
|September 28, 2011
Summary
The AAA-type ATPase Cdc48 (p97/VCP) molecular machine unfolds and pulls proteins. Its role in endoplasmic reticulum-associated protein degradation (ERAD) is best understood, involving misfolded protein removal for proteasomal degradation.
Area of Science:
- Molecular Biology
- Cell Biology
- Biochemistry
Background:
- AAA-type ATPases, like Cdc48 (p97/VCP), are crucial molecular machines in eukaryotic cells.
- Cdc48 utilizes ATP hydrolysis to generate mechanical force for protein unfolding and manipulation.
- The function of Cdc48 in endoplasmic reticulum-associated protein degradation (ERAD) is well-characterized.
Purpose of the Study:
- This review details the molecular mechanisms of the Cdc48-Ufd1-Npl4 motor complex.
- It focuses on the role of Cdc48 in the ERAD pathway.
- The article aims to consolidate current knowledge on this specific Cdc48-mediated process.
Main Methods:
- This is a review article, synthesizing existing research.
- It focuses on the known details of the Cdc48-Ufd1-Npl4 complex.
- The review discusses protein unfolding, pulling, and degradation processes.
Main Results:
- Cdc48 machinery is recruited to the ER membrane to handle misfolded proteins.
- Polyubiquitylated misfolded proteins are pulled away from the ER membrane by Cdc48-Ufd1-Npl4.
- The complex delivers substrates for degradation by the proteasome.
Conclusions:
- Cdc48 is essential for quality control in the secretory pathway via ERAD.
- The Cdc48-Ufd1-Npl4 complex acts as a powerful motor for protein extraction and degradation.
- Understanding this machinery provides insights into cellular protein homeostasis.
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