In Vitro Transcription-Translation in an Artificial Biomolecular Condensate

Area of Science:

• Biochemistry
• Origin of Life Research
• Synthetic Biology

Background:

• Biomolecular condensates are key to synthetic cell formation and understanding life's origins.
• Integrating complex biological networks, like in vitro transcription-translation (IVTT), into condensates is a major challenge.
• Successful integration is crucial for developing condensation-based synthetic cells and demonstrating condensate compatibility with core cellular processes.

Purpose of the Study:

• To systematically evaluate the compatibility of eight different biomolecular condensates with IVTT.
• To identify specific condensate systems capable of supporting complex biochemical reactions.
• To establish biomolecular condensates as viable platforms for synthetic cell construction.

Main Methods:

• Screened eight distinct (bio)molecular condensate systems for IVTT compatibility.
• Utilized a green fluorescent protein-labeled, intrinsically disordered cationic protein (GFP-K72) and single-stranded DNA (ssDNA) to form functional condensates.
• Quantified fluorescent protein expression levels within the condensates to assess reaction efficiency.

Main Results:

• Identified GFP-K72 and ssDNA condensates as compatible with IVTT.
• Achieved significant fluorescent protein expression (up to μM levels) within these specific condensates.
• Demonstrated that biomolecular condensates can successfully integrate complex reaction networks.

Conclusions:

• Biomolecular condensates, specifically those formed by GFP-K72 and ssDNA, can host and support complex biochemical processes like IVTT.
• These findings confirm the potential of biomolecular condensates as platforms for synthetic cell development.
• The study provides evidence supporting the role of condensates in the origin of life and their compatibility with the central dogma.