Protein-Encoding Free-Standing RNA Hydrogel for Sub-Compartmentalized Translation

Area of Science:

• Biochemistry
• Materials Science
• Synthetic Biology

Background:

• RNA molecules self-assemble into intricate structures crucial for biological regulation, including protein synthesis and catalysis.
• Despite RNA's functional versatility, its inherent chemical instability and limited technological applications have historically hindered its design potential.
• RNA's structural complexity and diverse functions offer significant promise for bio-inspired engineering.

Purpose of the Study:

• To engineer a stable, free-standing RNA hydrogel with enhanced functionalities.
• To investigate the catalytic properties and protein expression enhancement capabilities of the developed RNA hydrogel.
• To explore the potential of RNA hydrogels in creating controlled, phase-separated biological environments.

Main Methods:

• A sequential process combining ligation and rolling circle transcription was employed to synthesize the RNA hydrogel.
• The hydrogel was designed to form RNA G-quadruplex structures, known for their stability and functional properties.
• The system was utilized to create sub-compartmentalized, phase-separated environments for in vitro translation.

Main Results:

• A robust, free-standing RNA hydrogel was successfully developed.
• The RNA hydrogel demonstrated intrinsic catalytic activity.
• The hydrogel significantly enhanced the expression of several proteins within the phase-separated translation environments.
• The formation of RNA G-quadruplexes was confirmed as a key structural feature.

Conclusions:

• The developed RNA hydrogel represents a significant advancement in RNA-based materials science.
• The hydrogel's catalytic and protein expression-enhancing properties open new avenues for RNA applications.
• This work is expected to broaden the scope of RNA research and impact future RNA engineering principles and practical uses.