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Theoretical study of copper binding to GHK peptide

Alshammari, Nadiyah and Platts, James A. 2020. Theoretical study of copper binding to GHK peptide. Computational Biology and Chemistry 86 , 107265. 10.1016/j.compbiolchem.2020.107265
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We report ligand field molecular mechanics, density functional theory and semi-empirical studies on the binding of Cu(II) to GlyHisLys (GHK) peptide. Following exhaustive conformational searching using molecular mechanics, we show that relative energy and geometry of conformations are in good agreement between GFN2-xTB semi-empirical and B3LYP-D DFT levels. Conventional molecular dynamics simulation of Cu-GHK shows the stability of the copper-peptide binding over 100 ps trajectory. Four equatorial bonds in 3N1O coordination remain stable throughout simulation, while a fifth in apical position from C-terminal carboxylate is more fluxional. We also show that the automated conformer and rotamer search algorithm CREST is able to correctly predict the metal binding position from a starting point consisting of separated peptide, copper and water.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Publisher: Elsevier
ISSN: 1476-9271
Date of First Compliant Deposit: 12 May 2020
Date of Acceptance: 9 April 2020
Last Modified: 15 May 2020 04:28

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