title: Interaction of amino acids with the Au(111) surface: adsorption free energies from molecular dynamics simulations.
abstract: Interactions of proteins with inorganic surfaces are of high importance in biological events and in modern biotechnological applications. Therefore, peptides have been engineered to recognize inorganic surfaces with high specificity. However, the underlying interactions are still not well understood. Here, we investigated the adsorption of amino acids as protein building blocks onto a Au(111) surface. In particular, using molecular dynamics simulations, we calculated the potential of mean force between all the 20 amino acids and the gold surface. We found a strong dependence of the binding affinities on the chemical character of the amino acids. Additionally, the interaction free energy is correlated with the propensity of amino acids to form beta-sheets, hinting at design principles for gold binding peptides and induction of beta-sheet formation near surfaces.
authors.affiliation: Ludwig-Maximilians University, Amalienstr. 54, 80799 Munich, Germany.
authors.forename: Martin
authors.initials: M
authors.lastname: Hoefling
authors.forename: Francesco
authors.initials: F
authors.lastname: Iori
authors.forename: Stefano
authors.initials: S
authors.lastname: Corni
authors.forename: Kay-Eberhard
authors.initials: KE
authors.lastname: Gottschalk
mesh_terms: D000327:Adsorption; D000596:Amino Acids / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D056004:Molecular Dynamics Simulation
chemical_list: D000596:Amino Acids; D006046:Gold