Reconstituted Cell-free Translation Systems for Exploring Protein Folding and Aggregation.

Area of Science:

• Biochemistry and Molecular Biology
• Protein Science
• Cellular Homeostasis

Background:

• Protein folding is essential for cellular function but can be disrupted by aggregation.
• Cellular quality control systems, including chaperones, mitigate protein misfolding and aggregation.
• Traditional studies focus on refolding purified proteins, leaving cotranslational folding mechanisms underexplored.

Purpose of the Study:

• To review the application of cell-free protein synthesis (CFPS) systems in studying protein folding.
• To explore the mechanisms of cotranslational folding, where proteins fold during synthesis.
• To highlight CFPS as a tool for large-scale identification of aggregation-prone proteins.

Main Methods:

• Utilizing cell-free protein synthesis (CFPS) systems to study protein folding in vitro.
• Employing a reconstituted translation system for chaperone-free protein synthesis.
• Conducting comprehensive aggregation formation assays on thousands of Escherichia coli proteins.

Main Results:

• Demonstrated the utility of CFPS for investigating cotranslational folding pathways.
• Identified numerous aggregation-prone proteins through large-scale screening under cell-free conditions.
• Provided insights into protein aggregation independent of cellular chaperone systems.

Conclusions:

• Cell-free protein synthesis (CFPS) is a powerful platform for dissecting protein folding and aggregation.
• Understanding cotranslational folding is critical for protein homeostasis.
• CFPS facilitates the discovery of aggregation propensity, aiding in the study of protein misfolding diseases.