Red light-triggered nucleic acid-templated reaction based on cyclic oligonucleotide substrates.

Area of Science:

• Biochemistry
• Molecular Biology
• Analytical Chemistry

Background:

• Cyclic oligonucleotide substrates offer potential for novel biochemical reactions.
• Developing sensitive detection methods for nucleic acids is crucial in molecular diagnostics.

Purpose of the Study:

• To develop a red light-triggered reaction for generating a fluorescent probe.
• To investigate the acceleration of this reaction by nucleic acid templates.
• To assess the compatibility of the reaction with fluorescence correlation spectroscopy (FCS) for nucleic acid detection.

Main Methods:

• Development of a red light-triggered reaction utilizing cyclic oligonucleotide substrates.
• Employing specific nucleic acid templates to accelerate the reaction.
• Utilizing fluorescence correlation spectroscopy (FCS) for sensitive detection.

Main Results:

• A red light-triggered reaction was successfully developed, generating a bright fluorescent probe.
• The reaction rate was accelerated over 30-fold by specific nucleic acid templates.
• The reaction was confirmed to be compatible with FCS, enabling nucleic acid detection.

Conclusions:

• A novel, light-triggered reaction provides a sensitive platform for nucleic acid detection.
• The developed method offers a significant acceleration and improved sensitivity using template-directed catalysis.
• Compatibility with FCS allows for precise quantification of nucleic acids at low concentrations (down to 1 nM).