Related Experiment Video
Updated: Apr 30, 2026
07:10
Split Hybridization Probe Utilizing a DNA Fluorescent Light-up Aptamer as a Signal Reporter for Sequence-Specific Nucleic Acid Analysis
Published on: July 8, 2025
1.2K
Single-Molecule Fluorescence Using Nucleotide Analogs: A Proof-of-Principle
Elvin A Alemán1, Chamaree de Silva2, Eric M Patrick1
1Department of Chemistry, Wayne State University , 5101 Cass Avenue, Detroit, Michigan 48202, United States.
The Journal of Physical Chemistry Letters
|May 8, 2014
Summary
This study introduces a novel single-molecule fluorescence assay using fluorescent nucleotide analogs like 2-aminopurine (2AP) and pyrrolo-C (PyC) to monitor DNA and RNA dynamics in real time.
Area of Science:
- Biochemistry
- Molecular Biology
- Biophysics
Background:
- Fluorescent nucleotide analogs (2-aminopurine, 2AP; pyrrolo-C, PyC) are established tools for studying nucleic acid dynamics.
- Previous studies primarily utilized these analogs in bulk experiments.
Purpose of the Study:
- To present a proof-of-principle for using 2AP and PyC fluorescence at the single-molecule level.
- To enable real-time monitoring of DNA and RNA at the single-molecule scale.
Main Methods:
- Utilized single-molecule fluorescence spectroscopy.
- Employed a click chemistry immobilization method for nucleic acid samples.
- Incorporated fluorescent nucleotide analogs (2AP and PyC) into ssDNA, dsDNA, and RNA.
Main Results:
- Demonstrated successful monitoring of DNA and RNA containing both 2AP and PyC at the single-molecule level.
- Showcased the capability of the assay for real-time observation of nucleic acid behavior.
- Established the first reported assay utilizing fluorescent nucleotide analogs for single-molecule analysis.
Conclusions:
- The developed single-molecule fluorescence assay provides a new method for studying nucleic acid dynamics.
- This approach has broad potential applications, including investigating protein-nucleic acid interactions and base-flipping dynamics.
