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Measuring In Vitro ATPase Activity for Enzymatic Characterization
Published on: August 23, 2016
AAA ATPase p97/VCP: cellular functions, disease and therapeutic potential
1Division of Pediatric Respiratory Sciences & Institute of NanoBioTechnology, The Johns Hopkins School of Medicine, Baltimore, MD 21287, USA. nvij1@jhmi.edu
Journal of Cellular and Molecular Medicine
|September 19, 2008
Summary
The AAA-ATPase protein p97/VCP is crucial for clearing misfolded proteins via endoplasmic reticulum-associated degradation (ERAD). Targeting VCP offers therapeutic potential for protein aggregation diseases.
Area of Science:
- Cellular Biology
- Protein Degradation Pathways
- Neurodegenerative Diseases
Background:
- The AAA-ATPase protein p97/VCP plays a role in essential cellular processes including DNA damage response, cell cycle regulation, and protein degradation.
- VCP facilitates the removal of ubiquitinated proteins from the endoplasmic reticulum (ER) for proteasomal degradation through the ERAD pathway.
- VCP's interactions are critical for substrate selection and ubiquitination in ERAD, highlighting its central role in managing misfolded proteins.
Purpose of the Study:
- To investigate the role of p97/VCP in protein degradation and its potential as a therapeutic target.
- To explore VCP's involvement in cytosolic protein aggregation and neurodegenerative diseases.
- To identify VCP as a target for diseases characterized by misfolded protein accumulation.
Main Methods:
- Review of VCP's known functions in cellular pathways.
- Analysis of VCP's role in endoplasmic reticulum-associated degradation (ERAD).
- Examination of VCP's involvement in protein aggregation and neurodegenerative disease mechanisms.
Main Results:
- VCP is essential for ERAD, dislodging ubiquitinated proteins for proteasomal degradation.
- VCP's phosphorylation by Akt regulates ERAD.
- VCP's polyglutamine and ubiquitin-binding capacity links it to proteasomal degradation and aggregate processing in diseases.
Conclusions:
- VCP is a key regulator of misfolded protein degradation and a potential therapeutic target for protein aggregation disorders.
- Targeting VCP interactions or ERAD function may rescue protein function in diseases like cystic fibrosis and alpha-1-trypsin deficiency.
- Controlling VCP expression is a potential therapeutic strategy for polyQ-induced neurodegenerative diseases.
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