Specific proteolysis mediated by a p97-directed proteolysis-targeting chimera (p97-PROTAC)

Area of Science:

• Biochemistry
• Molecular Biology
• Cell Biology

Background:

• The p97 protein (VCP) is an AAA+ ATPase crucial for protein unfolding and degradation via the 26S proteasome.
• p97 function relies on adaptor proteins for substrate recognition and recruitment.
• Current methods for targeted protein degradation often depend on E3 ubiquitin ligases.

Purpose of the Study:

• To engineer synthetic adaptors for specific substrate targeting to p97.
• To develop a novel p97-directed proteolysis-targeting chimera (PROTAC) system.
• To establish an E3 ubiquitin ligase-independent strategy for targeted protein degradation.

Main Methods:

• Engineering camelid nanobodies fused to the UBX domain of the p97 adaptor protein FAF1.
• Constructing p97-directed proteolysis-targeting chimeras (PROTACs).
• Evaluating system efficacy and specificity in human cell lines.

Main Results:

• Successfully engineered synthetic adaptors capable of targeting specific substrates to p97.
• Demonstrated the creation of a functional p97-directed PROTAC.
• Showcased an E3 ubiquitin ligase-independent mechanism for targeted proteolysis.

Conclusions:

• Engineered synthetic adaptors provide a novel tool for p97-mediated protein degradation.
• The developed PROTAC system offers a unique E3 ubiquitin ligase-independent approach for targeted proteolysis.
• This strategy holds potential for specific protein degradation in various cellular contexts.