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Updated: Jun 5, 2026
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Protein Kinase C-delta Inhibitor Peptide Formulation using Gold Nanoparticles
Published on: March 9, 2019
Design Rules for Selective Peptide Amphiphile-Gold Nanoparticle Interactions from Atomistic Simulations
Christopher Kang1, Abigail Gringeri2, Abigail S Knight2
1Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States.
Langmuir : the ACS Journal of Surfaces and Colloids
|June 4, 2026
Summary
Peptide amphiphiles guide gold nanoparticle growth via specific residue interactions. Tyrosine and lysine residues cooperatively enhance adsorption, offering principles for nanomaterial engineering.
Area of Science:
- Materials Science
- Biomaterials Engineering
- Computational Chemistry
Background:
- Peptide amphiphiles (PAs) offer tunable control over biomineralization processes.
- Understanding PA interactions at the water-metal interface is crucial for nanoparticle engineering.
- Current knowledge of residue-level mechanisms guiding nanoparticle growth is limited.
Purpose of the Study:
- To elucidate the atomic-level mechanisms of peptide amphiphile adsorption and orientation on gold surfaces.
- To determine the contributions of individual amino acid residues and cooperative effects to adsorption.
- To provide a framework for designing PAs for controlled nanomaterial synthesis.
Main Methods:
- Molecular dynamics (MD) simulations were employed to study PA adsorption on Au(111) and Au(100) surfaces.
- Enhanced sampling techniques were used to calculate free energy landscapes.
- Simulations analyzed interactions of individual amino acids, peptide segments, and full PAs.
Main Results:
- Tyrosine residues were found to dominate the adsorption of a modular PA on Au(111).
- Charged residues and peptide backbones showed varying degrees of interaction depending on the molecular construct and surface facet.
- Cooperative effects, such as adjacent lysine residues, were shown to enhance tyrosine-mediated adsorption and influence facet selectivity.
Conclusions:
- The study provides the first atomically detailed understanding of peptide amphiphile-gold interactions.
- Specific residue-surface and residue-residue interactions dictate PA adsorption behavior.
- These findings offer guiding principles for engineering PAs for advanced nanomaterial applications.
