TXTL-based approach to synthetic cells.

Area of Science:

• Synthetic biology
• Biotechnology
• Biochemistry

Background:

• Cell-free transcription-translation (TXTL) is a powerful tool for biological engineering.
• Developing synthetic cells requires efficient methods for encapsulating biological reactions.

Purpose of the Study:

• To demonstrate the use of an all Escherichia coli (E. coli) TXTL system for building synthetic cell prototypes.
• To describe methods for encapsulating TXTL reactions within cell-sized liposomes.

Main Methods:

• Encapsulation of TXTL reactions in liposomes.
• Optimization of external solution and lipid bilayer composition for encapsulation.
• Quantitative description of cell-free protein expression in bulk and liposomal systems.

Main Results:

• Successful encapsulation of TXTL reactions in liposomes.
• Quantitative expression data for soluble eGFP and membrane proteins alpha-hemolysin (AH) and MscL.
• Demonstration of protein production within synthetic cell prototypes.

Conclusions:

• An all E. coli TXTL system is effective for creating synthetic cell prototypes.
• Liposome encapsulation is a viable method for cell-free expression systems.
• This approach enables the engineering of functional biological systems in vitro.