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Free energy surfaces for the interaction of D-glucose with planar aromatic groups in aqueous solution
KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.ORCID iD: 0000-0001-6732-2571
2010 (English)In: Journal of Chemical Physics, ISSN 0021-9606, E-ISSN 1089-7690, Vol. 133, no 15, 155103- p.Article in journal (Refereed) Published
Abstract [en]

Multidimensional potentials of mean force for the interactions in aqueous solution of both anomers of D-glucopyranose with two planar aromatic molecules, indole and para-methyl-phenol, have been calculated using molecular dynamics simulations with umbrella sampling and were subsequently used to estimate binding free energies. Indole and para-methyl-phenol serve as models for the side chains of the amino acids tryptophan and tyrosine, respectively. In all cases, a weak affinity between the glucose molecules and the flat aromatic surfaces was found. The global minimum for these interactions was found to be for the case when the pseudoplanar face of beta-D-glucopyranose is stacked against the planar surfaces of the aromatic residues. The calculated binding free energies are in good agreement with both experiment and previous simulations. The multidimensional free energy maps suggest a mechanism that could lend kinetic stability to the complexes formed by sugars bound to sugar-binding proteins. (C) 2010 American Institute of Physics.

Place, publisher, year, edition, pages
2010. Vol. 133, no 15, 155103- p.
National Category
Chemical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-26228DOI: 10.1063/1.3496997ISI: 000283359300071Scopus ID: 2-s2.0-78049282418OAI: oai:DiVA.org:kth-26228DiVA: diva2:399371
Note
QC 20110222Available from: 2011-02-22 Created: 2010-11-21 Last updated: 2017-12-11Bibliographically approved

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Wohlert, Jakob

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