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Related Experiment Video

Updated: Jun 6, 2026

Electrophoretic Mobility Shift Assay (EMSA) for the Study of RNA-Protein Interactions: The IRE/IRP Example
12:44

Electrophoretic Mobility Shift Assay (EMSA) for the Study of RNA-Protein Interactions: The IRE/IRP Example

Published on: December 3, 2014

Electrophoretic mobility shift assay for characterizing RNA-protein interaction.

Keith T Gagnon1, E Stuart Maxwell

  • 1Department of Pharmacology, University of Texas Southwestern Medical Center, Dallas, TX, USA. ktgagnon@gmail.com

Methods in Molecular Biology (Clifton, N.J.)
|December 3, 2010
PubMed
Summary

Electrophoretic mobility shift assay (EMSA) is a method to study macromolecule interactions. This protocol details using EMSA to analyze protein-RNA interactions and ribonucleoprotein assembly.

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12:44

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Horizontal Gel Electrophoresis for Enhanced Detection of Protein-RNA Complexes
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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Biophysics

Background:

  • Electrophoretic mobility shift assay (EMSA) is a standard technique for analyzing macromolecule interactions.
  • EMSA separates molecules based on size, shape, and charge under native conditions.
  • It provides insights into interactions between molecules like RNA and proteins.

Purpose of the Study:

  • To present a practical protocol for using EMSA to study protein-RNA interactions.
  • To detail the assessment of ribonucleoprotein (RNP) assembly using EMSA.
  • To provide a guide for implementing EMSA in RNP complex research.

Main Methods:

  • The study outlines the conceptual framework of EMSA.
  • A step-by-step protocol is provided for binding archaeal ribosomal protein L7Ae to a box C/D sRNA.
  • Technical tips and common pitfalls are discussed for practical application.

Main Results:

  • The protocol facilitates the study of protein-RNA interactions.
  • It enables the analysis of ribonucleoprotein assembly.
  • The method is applicable to various RNP complexes.

Conclusions:

  • This protocol serves as a guide for employing EMSA in RNP research.
  • It offers practical considerations for successful EMSA implementation.
  • The method supports the investigation of diverse ribonucleoprotein complexes.