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Related Experiment Video

Updated: Jul 13, 2026

Investigating Single Molecule Adhesion by Atomic Force Spectroscopy
09:48

Investigating Single Molecule Adhesion by Atomic Force Spectroscopy

Published on: February 27, 2015

Automated alignment and pattern recognition of single-molecule force spectroscopy data.

M Kuhn1, H Janovjak, M Hubain

  • 1Division of Computer Science, California Institute of Technology, Pasadena, California 91125, USA.

Journal of Microscopy
|April 29, 2005
PubMed
Summary

New software analyzes atomic force microscopy (AFM) force spectra from single protein unfolding experiments. This tool identifies distinct protein folding pathways and simplifies analysis of large datasets, advancing biomolecular research.

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Area of Science:

  • Biophysics
  • Computational Biology
  • Molecular Biology

Background:

  • Ultra-sensitive force probe methods like atomic force microscopy (AFM) enable direct measurement of forces stabilizing single proteins and receptor-ligand bonds.
  • Force spectroscopy experiments involve tethering a single molecule or pair between an AFM tip and a surface, measuring force versus extension to generate characteristic force spectra.

Purpose of the Study:

  • To develop and present software and algorithms for analyzing large numbers of single-molecule force spectra.
  • To enable automated recognition of patterns and classification of unfolding pathways from force spectroscopy data.

Main Methods:

  • Development of C++ based software utilizing the GNU Scientific Library (GSL) and WaveMetrics IGOR Pro.
  • Implementation of algorithms for fitting polymer extension models to force peaks and automatic alignment of spectra.

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Force Spectroscopy of Single Protein Molecules Using an Atomic Force Microscope
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Force Spectroscopy of Single Protein Molecules Using an Atomic Force Microscope

Published on: February 28, 2019

Covalent Attachment of Single Molecules for AFM-based Force Spectroscopy
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Covalent Attachment of Single Molecules for AFM-based Force Spectroscopy

Published on: March 16, 2020

Related Experiment Videos

Last Updated: Jul 13, 2026

Investigating Single Molecule Adhesion by Atomic Force Spectroscopy
09:48

Investigating Single Molecule Adhesion by Atomic Force Spectroscopy

Published on: February 27, 2015

Force Spectroscopy of Single Protein Molecules Using an Atomic Force Microscope
06:45

Force Spectroscopy of Single Protein Molecules Using an Atomic Force Microscope

Published on: February 28, 2019

Covalent Attachment of Single Molecules for AFM-based Force Spectroscopy
10:37

Covalent Attachment of Single Molecules for AFM-based Force Spectroscopy

Published on: March 16, 2020

  • Analysis of force spectra from unfolding single transmembrane proteins (bacteriorhodopsin and NhaA) to demonstrate software capabilities.

    • Main Results:

    • The developed software successfully aligns large numbers of force spectra, revealing patterns across different experiments.
    • Classification of peak patterns in aligned spectra allowed for the detection of distinct unfolding pathways for transmembrane proteins.
    • The software facilitates easy identification of deviant spectra, such as those with no attachment or erratic peaks.

    Conclusions:

    • The developed software provides an efficient method for analyzing large datasets of single-molecule force spectroscopy data.
    • Automated analysis enables the identification of complex biomolecular behaviors, such as diverse protein unfolding pathways.
    • Open-source availability of the software (http://bioinformatics.org/fskit/) promotes further research in biophysics and molecular dynamics.