Abstract
Neutron Brillouin scattering and molecular dynamics simulations have been used to investigate protein hydration water density fluctuations as a function of pressure. Our results show significant differences between the pressure and density dependence of collective dynamics in bulk water and in concentrated protein solutions. Pressure-induced changes in the tetrahedral order of the water HB network have direct consequences for the high-frequency sound velocity and damping coefficients, which we find to be a sensitive probe for changes in the HB network structure as well as the wetting of biomolecular surfaces.
Original language | English (US) |
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Pages (from-to) | 11410-11415 |
Number of pages | 6 |
Journal | Proceedings of the National Academy of Sciences of the United States of America |
Volume | 114 |
Issue number | 43 |
DOIs | |
State | Published - Oct 24 2017 |
Externally published | Yes |
Keywords
- Collective THz modes
- High pressure
- Hydration water
- Molecular dynamics
- Neutron scattering
ASJC Scopus subject areas
- General