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Updated: Jul 6, 2026
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Insights into the Interactions of Amino Acids and Peptides with Inorganic Materials Using Single-Molecule Force Spectroscopy
Published on: March 6, 2017
Evaluation of interaction forces between profilin and designed peptide probes by atomic force microscopy
Tomoko Okada1, Masato Sano, Yuji Yamamoto
1School of Bionics, Tokyo University of Technology, Katakura, Hachioji, Tokyo, Japan.
Langmuir : the ACS Journal of Surfaces and Colloids
|March 14, 2008
Summary
We measured the binding affinity of peptide probes for the protein profilin using atomic force microscopy (AFM). Peptide probe 1 demonstrated the highest affinity, with a single molecular retraction force of 96 pN.
Area of Science:
- Biophysics
- Molecular Biology
- Biochemistry
Background:
- Profilin is a key protein involved in actin cytoskeleton dynamics.
- Understanding protein-ligand interactions is crucial for drug discovery and molecular diagnostics.
Purpose of the Study:
- To evaluate the binding affinity of novel peptide probes to the protein profilin.
- To determine the sequence-dependent interaction forces between peptides and profilin.
Main Methods:
- Utilized atomic force microscopy (AFM) with force curve measurements.
- Immobilized synthesized peptide probes (H-A3GP5GP5GP5G-OH, H-A3GP5G-OH, H-A3G7-OH, H-A3G-OH) on cantilever tips.
- Examined interaction forces with profilin immobilized on a mica substrate.
Main Results:
- Force curve measurements revealed sequence-dependent binding affinities of the peptide probes for profilin.
- Peptide probe 1 (H-A3GP5GP5GP5G-OH) exhibited the largest retraction force, indicating high affinity.
- The single molecular retraction force between peptide probe 1 and profilin was determined to be 96 pN.
Conclusions:
- Peptide probe 1 shows significant binding affinity for profilin.
- AFM force measurements are effective for quantifying peptide-protein interactions.
- These findings contribute to the development of targeted molecular probes.
