Systematic Mutation and Unnatural Base Pair Incorporation Improves Riboswitch-Based Biosensor Response Time

Area of Science:

• Biotechnology and molecular engineering
• RNA nanotechnology
• Biosensor development

Background:

• Engineered RNA molecules are crucial for various applications, including biomedical and environmental fields.
• The specific three-dimensional folding of RNA is essential for its biological function.
• Riboswitch-based fluorescent biosensors rely on RNA structure for detecting specific molecules.

Purpose of the Study:

• To enhance the response time of riboswitch-based fluorescent biosensors.
• To investigate the impact of base pair modifications on RNA folding and biosensor performance.
• To develop strategies for improving RNA-based tools through systematic mutagenesis.

Main Methods:

• Employing systematic mutagenesis to introduce base pair alterations in engineered RNAs.
• Creating transpose or transition base pair mutants.
• Introducing orthogonal base pairs, including both natural and unnatural base pairs.

Main Results:

• Mutagenesis strategies significantly improved the response time of the riboswitch-based fluorescent biosensor.
• Modified base pairs enhanced sensor speed without compromising fold turn-on characteristics.
• Ligand binding affinity remained unaffected by the introduced base pair mutations.

Conclusions:

• Base pair modifications represent a viable strategy for accelerating RNA biosensor response times.
• The developed mutagenesis techniques are transferable to enhance the performance of other RNA-based technologies.
• This research contributes to the advancement of efficient and rapid RNA-based detection systems.