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Single-Molecule FRET X.

Mike Filius1, Raman van Wee1, Chirlmin Joo2

  • 1Department of BioNanoScience, Kavli Institute of Nanoscience, Delft University of Technology, Delft, The Netherlands.

Methods in Molecular Biology (Clifton, N.J.)
|October 12, 2023
PubMed
Summary
This summary is machine-generated.

Fluorescence resonance energy transfer by DNA eXchange (FRET X) enables mapping multiple distances in single molecules. This method overcomes limitations of traditional single-molecule FRET for structural analysis.

Keywords:
DNA nanotechnologyFRET XSingle-molecule FRETSingle-molecule multiplexingStructural biology

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Area of Science:

  • Biophysics
  • Molecular Biology
  • Nanotechnology

Background:

  • Fluorescence resonance energy transfer (FRET) is a biophysical method for measuring nanometer distances.
  • Conventional single-molecule FRET is limited in probing multiple points of interest (POIs) within a single molecule.

Purpose of the Study:

  • To describe the methodology for structural analysis of DNA nanostructures using FRET X.
  • To highlight FRET X's capability to probe multiple POIs on a single molecule.

Main Methods:

  • FRET X utilizes short, fluorescently labeled DNA imager strands that bind complementary docking strands on a target molecule.
  • This transient binding allows for at most a single FRET pair formation at any given time.
  • The method facilitates the probing of multiple POIs on a single molecule.

Main Results:

  • FRET X successfully enables the probing of multiple POIs within a single DNA nanostructure.
  • The described protocol details sample preparation, image acquisition, and data analysis for FRET X.
  • This technique overcomes the limitations of conventional single-molecule FRET.

Conclusions:

  • FRET X is a powerful tool for detailed structural analysis of DNA nanostructures.
  • The method provides a significant advancement for single-molecule biophysical studies.
  • This work establishes a comprehensive approach for implementing FRET X.