Coincidence of Dynamical Transitions in a Soluble Protein and Its Hydration Water: Direct Measurements by Neutron Scattering and MD Simulations
Journal of the American Chemical Society2008Vol. 130(14), pp. 4586–4587
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Kathleen Wood, Andreas Frölich, Alessandro Paciaroni, Martine Moulin, Michael Härtlein, Giuseppe Zaccaı̈, Douglas J. Tobias, Martin H. Weik
Abstract
The coupling between protein dynamics and hydration-water dynamics was assessed by perdeuteration, temperature-dependent neutron scattering, and molecular dynamics simulations. Mean square displacements of water and protein motions both show a broad transition at 220 K and are thus coupled. In particular, the protein dynamical transition appears to be driven by the onset of hydration-water translational motion.
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