Autophagy-regulating protease Atg4: structure, function, regulation and inhibition.

Area of Science:

• Cell Biology
• Molecular Biology
• Biochemistry

Background:

• Autophagy is a fundamental cellular process essential for maintaining homeostasis by degrading cellular components.
• Dysregulation of autophagy is linked to various diseases, including neurodegenerative disorders, cancer, and infections, highlighting its therapeutic potential.
• Autophagy-related (Atg) proteins mediate this process, with Atg4 protease playing a crucial role in regulating Atg8 processing and deconjugation.

Purpose of the Study:

• To review the current understanding of Atg4 protease structure, function, and regulation.
• To explore the development of Atg4-specific inhibitors as a therapeutic strategy for modulating autophagy.

Main Methods:

• Literature review of studies on Atg4 protease and autophagy.
• Analysis of Atg4 structure-function relationships.
• Summary of efforts in developing Atg4-specific inhibitors.

Main Results:

• Atg4 is the sole protease essential for autophagy regulation via Atg8 processing.
• Atg4 activity is highly specific to the autophagy pathway.
• Development of Atg4-specific inhibitors is a promising area for therapeutic intervention.

Conclusions:

• Atg4 is a critical and specific target for developing autophagy-modulating therapies.
• Further research into Atg4 structure and function can facilitate the design of novel inhibitors.
• Targeting Atg4 offers a potential strategy for treating autophagy-related diseases.