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Related Experiment Video

Updated: Dec 20, 2025

Myosin-Specific Adaptations of In vitro Fluorescence Microscopy-Based Motility Assays
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High-Speed Atomic Force Microscopy to Study Myosin Motility.

Noriyuki Kodera1, Toshio Ando2

  • 1Nano Life Science Institute (WPI NanoLSI), Kanazawa University, Kanazawa, Japan.

Advances in Experimental Medicine and Biology
|May 27, 2020
PubMed
Summary
This summary is machine-generated.

High-speed atomic force microscopy visualizes dynamic proteins like myosin V in action. This technique reveals novel molecular behaviors and provides clear evidence for myosin

Keywords:
Chemo-mechanical couplingHigh-speed atomic force microscopyMolecular motorMyosin ATPaseSingle-molecule measurement

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Area of Science:

  • Biophysics
  • Molecular Biology
  • Microscopy

Background:

  • High-speed atomic force microscopy (HS-AFM) offers high temporal and spatial resolution for observing dynamic biological processes.
  • Studying protein dynamics is crucial for understanding cellular functions and molecular mechanisms.

Purpose of the Study:

  • To describe the principles, techniques, and performance of HS-AFM.
  • To present HS-AFM observations of myosin V motor protein activity.
  • To provide mechanistic insights into myosin motility using HS-AFM data.

Main Methods:

  • High-speed atomic force microscopy (HS-AFM) was employed to image protein molecules.
  • Focus was placed on imaging myosin V motor proteins interacting with actin filaments.
  • Analysis of recorded AFM movies to observe molecular motion and behavior.

Main Results:

  • HS-AFM achieved sub-100 ms temporal and submolecular spatial resolution imaging.
  • Filmed images provided direct evidence of the swinging lever arm motion in myosin V.
  • Novel molecular behaviors of myosin V during motility were observed and captured.

Conclusions:

  • HS-AFM is a powerful tool for studying highly dynamic proteins at the molecular level.
  • The study provides unprecedented insights into the mechanism of myosin V motility.
  • HS-AFM facilitates the discovery of previously unobserved molecular dynamics.