Probing the Activity of Eukaryotic Rhomboid Proteases In Vitro

Area of Science:

• Biochemistry
• Molecular Biology
• Enzymology

Background:

• Intramembrane proteolysis is a critical biological process mediated by enzymes like rhomboid proteases.
• These proteases regulate diverse cellular pathways, including signaling and protein degradation.
• Dysregulation of intramembrane proteolysis is linked to neurodegenerative diseases, highlighting the need for functional studies.

Purpose of the Study:

• To establish a reliable workflow for the in vitro characterization of eukaryotic rhomboid proteases.
• To develop and demonstrate methods for assessing enzyme activity and substrate cleavage.
• To provide a foundation for understanding rhomboid protease function and specificity.

Main Methods:

• Bacterial expression system for producing rhomboid proteases.
• Protein solubilization and purification techniques for membrane proteins.
• Activity-based labeling and gel-based cleavage assays for monitoring enzyme function.

Main Results:

• A robust workflow was developed to obtain pure and active rhomboid proteases.
• Established activity assays were successfully applied to monitor enzyme integrity and substrate cleavage.
• The methods were validated using Escherichia coli rhomboid protease GlpG and human RHBDL2.

Conclusions:

• The presented workflow facilitates the comprehensive in vitro characterization of eukaryotic rhomboid proteases.
• The described activity assays are essential tools for studying intramembrane protease function.
• This work provides a starting point for further research into rhomboid proteases and their roles in health and disease.