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Atomic Force Microscopy

Atomic Force Microscopy

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
The probe is regarded as the heart of any AFM setup and comprises the...

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Related Experiment Video

Updated: Jun 3, 2025

Visualization of Recombinant DNA and Protein Complexes Using Atomic Force Microscopy

Visualization of Recombinant DNA and Protein Complexes Using Atomic Force Microscopy

Published on: July 18, 2011

A Simple Protocol for Visualization of RNA-Protein Complexes by Atomic Force Microscopy.

Andrea Tripepi^1,2,3, Huma Shakoor^1,2,3, Petr Klapetek⁴

¹Central European Institute of Technology, Masaryk University, Brno, Czech Republic.

Current Protocols

|January 9, 2025

Summary

This summary is machine-generated.

This study presents a new Atomic Force Microscopy (AFM) method for visualizing RNA-protein complexes without metal ions. The technique effectively detects Staufen-RNA complexes, aiding molecular biology research.

Keywords:

AFM RNA–protein complex formation Staufen

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Last Updated: Jun 3, 2025

Visualization of Recombinant DNA and Protein Complexes Using Atomic Force Microscopy

Visualization of Recombinant DNA and Protein Complexes Using Atomic Force Microscopy

Published on: July 18, 2011

Visualizing Single Molecular Complexes In Vivo Using Advanced Fluorescence Microscopy

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Published on: September 8, 2009

Optical Tweezers to Study RNA-Protein Interactions in Translation Regulation

Optical Tweezers to Study RNA-Protein Interactions in Translation Regulation

Published on: February 12, 2022

Area of Science:

Molecular Biology
Biophysics
Nanotechnology

Background:

Atomic Force Microscopy (AFM) is increasingly used for biomolecule detection.
Visualizing RNA-protein complexes with AFM presents significant challenges.
Existing methods often require metallic cations, limiting applications.

Purpose of the Study:

To develop a simple, reliable AFM method for visualizing positively charged proteins bound to RNA.
To enable detection without metallic cations.
To characterize Staufen-RNA complexes.

Main Methods:

A novel AFM protocol for preparing and visualizing RNA-protein complexes.
Utilizing height and logarithmic stiffness channels for detection.
Comparison with other structural biology techniques.

Main Results:

Successfully visualized Staufen-RNA complexes using the new AFM method.
Demonstrated effective detection of protein-bound RNA via height or stiffness.
Highlighted the importance of mechanical property analysis for coated RNA.

Conclusions:

The developed AFM method offers a robust way to study RNA-protein interactions.
This technique overcomes limitations of cation-dependent visualization.
Complementary data from other structural methods are essential for comprehensive analysis.