Light-mediated multi-target protein degradation using arylazopyrazole photoswitchable PROTACs (AP-PROTACs)

Area of Science:

• Chemical Biology
• Molecular Biology
• Drug Discovery

Background:

• Targeted protein degradation is a rapidly advancing therapeutic modality.
• Spatiotemporal control over biological processes is crucial for understanding and treating diseases.
• Existing methods for controlling protein degradation lack precise spatial and temporal resolution.

Purpose of the Study:

• To develop a novel photoswitchable Proteolysis-Targeting Chimera (PROTAC) for light-activated protein degradation.
• To achieve spatiotemporal control over the degradation of specific protein targets using optical stimuli.
• To demonstrate the selective degradation of multiple protein kinases with external light control.

Main Methods:

• Design and synthesis of novel arylazopyrazole photoswitchable PROTACs (AP-PROTACs).
• Incorporation of a promiscuous kinase inhibitor into the AP-PROTAC structure.
• Utilizing different wavelengths of light for optical on/off control of protein degradation.
• Assessing the selective degradation of target protein kinases in cellular models.

Main Results:

• Successful development of AP-PROTACs enabling light-activable spatiotemporal control of protein degradation.
• Demonstrated selective degradation of four distinct protein kinases using the AP-PROTACs.
• Achieved precise on/off optical control over protein degradation by varying light wavelengths.
• Validated the efficacy of AP-PROTACs in a cellular context.

Conclusions:

• AP-PROTACs represent a significant advancement in achieving precise spatiotemporal control over targeted protein degradation.
• This technology offers a versatile platform for selective degradation of multiple protein kinases with external light stimuli.
• The developed AP-PROTACs hold potential for applications in chemical biology research and therapeutic strategies.