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GolP-CHARMM : first-principles based force fields for the interaction of proteins with Au(111) and Au(100)
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Wright, Louise B., Rodger, P. Mark, Corni, Stefano and Walsh, Tiffany R. (2013) GolP-CHARMM : first-principles based force fields for the interaction of proteins with Au(111) and Au(100). Journal of Chemical Theory and Computation, Volume 9 (Number 3). pp. 1616-1630. doi:10.1021/ct301018m
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Official URL: http://dx.doi.org/10.1021/ct301018m
Abstract
Computational simulation of peptide adsorption at the aqueous gold interface is key to advancing the development of many applications based on gold nanoparticles, ranging from nanomedical devices to smart biomimetic materials. Here, we present a force field, GolP-CHARMM, designed to capture peptide adsorption at both the aqueous Au(111) and Au(100) interfaces. The force field, compatible with the bio-organic force field CHARMM, is parametrized using a combination of experimental and first-principles data. Like its predecessor, GolP (Iori, F.; et al. J. Comput. Chem.2009, 30, 1465), this force field contains terms to describe the dynamic polarization of gold atoms, chemisorbing species, and the interaction between sp2 hybridized carbon atoms and gold. A systematic study of small molecule adsorption at both surfaces using the vdW-DF functional (Dion, M.; et al. Phys. Rev. Lett.2004, 92, 246401–1. Thonhauser, T.; et al. Phys. Rev. B2007, 76, 125112) is carried out to fit and test force field parameters and also, for the first time, gives unique insights into facet selectivity of gold binding in vacuo. Energetic and spatial trends observed in our DFT calculations are reproduced by the force field under the same conditions. Finally, we use the new force field to calculate adsorption energies, under aqueous conditions, for a representative set of amino acids. These data are found to agree with experimental findings.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science > Chemistry | ||||
| Journal or Publication Title: | Journal of Chemical Theory and Computation | ||||
| Publisher: | American Chemical Society | ||||
| ISSN: | 1549-9618 | ||||
| Official Date: | 12 March 2013 | ||||
| Dates: |
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| Volume: | Volume 9 | ||||
| Number: | Number 3 | ||||
| Page Range: | pp. 1616-1630 | ||||
| DOI: | 10.1021/ct301018m | ||||
| Status: | Not Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access |
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