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Related Concept Videos

Atomic Force Microscopy01:08

Atomic Force Microscopy

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Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
The AFM Probe
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ABEL-FRET: tether-free single-molecule FRET with hydrodynamic profiling.

Hugh Wilson1, Quan Wang2

  • 1Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ, USA.

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|June 15, 2021
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Summary
This summary is machine-generated.

We developed ABEL-FRET, a new method for single-molecule Förster resonance energy transfer (smFRET) measurements. This technique offers ultrahigh resolution without immobilizing molecules, providing dynamic insights into biomolecules.

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Area of Science:

  • Biophysics
  • Biochemistry
  • Nanotechnology

Background:

  • Single-molecule Förster resonance energy transfer (smFRET) is crucial for studying nanoscale conformation and dynamics.
  • Existing smFRET methods often require molecule immobilization, limiting observation times and resolution.
  • Current techniques may not fully achieve the potential resolution of FRET-based nanoscale metrology.

Purpose of the Study:

  • To introduce ABEL-FRET, an innovative platform for immobilization-free smFRET measurements.
  • To achieve ultrahigh resolving power in FRET efficiency for detailed molecular analysis.
  • To integrate single-molecule diffusivity with FRET for comprehensive hydrodynamic and conformational profiling.

Main Methods:

  • Development of the ABEL-FRET platform for single-molecule measurements.
  • Utilizing single-molecule diffusivity for hydrodynamic profiling (size and shape determination).
  • Concurrent measurement of intramolecular conformation using smFRET.

Main Results:

  • ABEL-FRET enables immobilization-free smFRET measurements with exceptional resolution.
  • Single-molecule diffusivity provides complementary size and shape information.
  • The combined approach offers a holistic and dynamic view of biomolecules.

Conclusions:

  • ABEL-FRET overcomes limitations of traditional smFRET by eliminating the need for immobilization.
  • The integration of diffusivity and FRET measurements enhances the understanding of biomolecular behavior.
  • This platform advances nanoscale metrology for dynamic biomolecular studies.