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Related Experiment Video

Updated: Apr 20, 2026

Single Molecule Fluorescence Energy Transfer Study of Ribosome Protein Synthesis
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Riboswitch structure and dynamics by smFRET microscopy.

Krishna C Suddala1, Nils G Walter2

  • 1Biophysics, University of Michigan, Ann Arbor, Michigan, USA; Single Molecule Analysis Group, Department of Chemistry, University of Michigan, Ann Arbor, Michigan, USA.

Methods in Enzymology
|November 30, 2014
PubMed
Summary
This summary is machine-generated.

Riboswitches dynamically regulate gene expression by sensing metabolites. Single-molecule fluorescence energy transfer (smFRET) microscopy reveals their folding pathways and ligand-binding mechanisms.

Keywords:
ConformationDynamicsFoldingRiboswitchessmFRET

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Biophysics

Background:

  • Riboswitches are structured noncoding RNA elements controlling gene expression.
  • Their function relies on sensing intracellular metabolite concentrations.
  • Understanding riboswitch conformational dynamics and ligand-induced folding is crucial.

Purpose of the Study:

  • To detail the application of prism-based total internal reflection fluorescence microscopy for single-molecule fluorescence energy transfer (smFRET) studies.
  • To investigate the structure, dynamics, and ligand-binding mechanisms of riboswitches.

Main Methods:

  • Single-molecule fluorescence energy transfer (smFRET) microscopy.
  • Prism-based total internal reflection fluorescence microscopy.
  • Monitoring intramolecular distances and their temporal evolution.

Main Results:

  • smFRET is a powerful technique for studying RNA folding pathways.
  • smFRET provides insights into the dynamics of biological macromolecules.
  • The described methods enable probing riboswitch structure and dynamics.

Conclusions:

  • smFRET microscopy is essential for understanding riboswitch mechanisms.
  • Ligand-mediated folding and conformational dynamics are key to riboswitch function.
  • Prism-based TIRF microscopy facilitates detailed smFRET studies of riboswitches.