Volume 52, Issue 38 pp. 10112-10115
Communication

The Role of Water and Sodium Ions in the Activation of the μ-Opioid Receptor

Dr. Shuguang Yuan

Corresponding Author

Dr. Shuguang Yuan

Laboratory of Physical Chemistry of Polymers and Membranes, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne (Switzerland)

Shuguang Yuan, Laboratory of Physical Chemistry of Polymers and Membranes, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne (Switzerland)===

Slawomir Filipek, Laboratory of Biomodeling, Faculty of Chemistry, University of Warsaw, Warsaw (Poland)===

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Prof. Horst Vogel

Prof. Horst Vogel

Laboratory of Physical Chemistry of Polymers and Membranes, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne (Switzerland)

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Prof. Slawomir Filipek

Corresponding Author

Prof. Slawomir Filipek

Laboratory of Biomodeling, Faculty of Chemistry, University of Warsaw, Warsaw (Poland)

Shuguang Yuan, Laboratory of Physical Chemistry of Polymers and Membranes, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne (Switzerland)===

Slawomir Filipek, Laboratory of Biomodeling, Faculty of Chemistry, University of Warsaw, Warsaw (Poland)===

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First published: 31 July 2013
Citations: 101

We acknowledge financial support from the European Community’s Seventh Framework Program (FP7/2007–2013; grant 211800) and the National Center of Science, Poland (DEC-2011/03/B/NZ1/03204). S.Y. was supported in part by the Swiss Sciex program (grant 11.150). Calculations were done in part at the Interdisciplinary Centre for Mathematical and Computational Modelling in Warsaw (grant G07-13).

Graphical Abstract

Dual effect of sodium ions: The activation of G-protein-coupled receptors depends on the presence of water molecules inside the receptor and also on allosteric interactions. The binding of sodium ions to the allosteric site of the μ opioid receptor was studied by microsecond molecular dynamics simulations and their seemingly contradictory roles in preventing ligand binding and facilitating receptor activation were explained.

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