Results 1 to 10 of about 106,976 (128)

Protein Crowding Effects on Hydration Water Dynamics. [PDF]

J Phys Chem Lett
Abstract Water is not only a solvent in which biological molecules are dissolved, but it also plays an essential and active role in the proper development of biological processes within living organism. Water hydration shell surrounds biomolecules and has a plasticizing impact on their backbone, allowing them to execute their physiological ...
Caminiti L, Taddei M, Catalini S, Bartolini P, Taschin A, Torre R.   +5 more
europepmc   +3 more sources

Hydration Water Dynamics and Instigation of Protein Structural Relaxation [PDF]

, 2003
The molecular mechanism of the solvent motion that is required to instigate the protein structural relaxation above a critical hydration level or transition temperature has yet to be determined. In this work we use quasi-elastic neutron scattering (QENS)
Head-Gordon, Teresa, Hura, Greg, Russo, Daniela   +2 more
core   +4 more sources

Dynamics of Water in Crystal Hydrates [PDF]

Zeitschrift für Naturforschung A, 1967
Deuteron magnetic resonance in Na2S2O6 · 2 D2O single crystals was investigated in the temperature range —68°C to +80°C. The activation energy for the flipping motion of the heavy water molecule was found to be (9.2 ± 1.5) kcal/mole. The quadrupole coupling constant and the asymmetry parameter in the low temperature case was found to be e2 q Q/h= (244 ±
S. Ketudat, I. Berthold, Alarich Weiss
  +4 more sources

Dynamics of protein hydration water [PDF]

Physical Review E, 2015
We present the frequency- and temperature-dependent dielectric properties of lysozyme solutions in a broad concentration regime, measured at subzero temperatures and compare the results with measurements above the freezing point of water and on hydrated lysozyme powder.
Wolf, M., Emmert, S., Gulich, Rudolf, Lunkenheimer, Peter, Loidl, Alois   +4 more
openaire   +4 more sources

Hydration Water Dynamics Near Biological Interfaces [PDF]

The Journal of Physical Chemistry B, 2008
We performed classical molecular dynamics simulations using both fixed-charge and polarizable water and protein force fields to contrast the hydration dynamics near hydrophilic and amphiphilic peptides as a function of temperature. The high peptide concentrations we use serve as a model for the surface of folded proteins where hydration layers around ...
Johnson, Margaret E, Malardier-Jugroot, Cecile, Murarka, Rajesh K, Head-Gordon, Teresa   +3 more
openaire   +4 more sources

Dynamical Transition of Protein-Hydration Water [PDF]

Physical Review Letters, 2010
Thin layers of water on biomolecular and other nanostructured surfaces can be supercooled to temperatures not accessible with bulk water. Chen et al. [Proc. Natl. Acad. Sci. U.S.A. 103, 9012 (2006)]10.1073/pnas.0602474103 suggested that anomalies near 220 K observed by quasielastic neutron scattering can be explained by a hidden critical point of bulk ...
Doster, W., Busch, S., Gaspar, A.M., Appavou, M.-S., Wuttke, J., Scheer, H.   +5 more
openaire   +3 more sources

Biomolecular hydration: From water dynamics to hydrodynamics [PDF]

Proceedings of the National Academy of Sciences, 2003
Thermally driven rotational and translational diffusion of proteins and other biomolecules is governed by frictional coupling to their solvent environment. Prediction of this coupling from biomolecular structures is a longstanding biophysical problem, which cannot be solved without knowledge of water dynamics in an interfacial region comparable to the ...
Bertil, Halle, Monika, Davidovic
openaire   +2 more sources

Insights into Hydration Dynamics and Cooperative Interactions in Glycerol-Water Mixtures by Terahertz Dielectric Spectroscopy. [PDF]

, 2019
We report relaxation dynamics of glycerol-water mixtures as probed by megahertz-to-terahertz dielectric spectroscopy in a frequency range from 50 MHz to 0.5 THz at room temperature.
Ali Charkhesht, Ben Sindle, Chengyuan Wen, Djamila Lou, Grant E., Nguyen Q. Vinh, Pethig R., Shengfeng Cheng, Stein W. D.   +8 more
core   +2 more sources

Microscopic mechanism of protein cryopreservation in an aqueous solution with trehalose [PDF]

, 2013
In order to investigate the cryoprotective mechanism of trehalose on proteins, we use molecular dynamics computer simulations to study the microscopic dynamics of water upon cooling in an aqueous solution of lysozyme and trehalose.
Corradini, Dario, Gallo, Paola, Stanley, H. Eugene, Strekalova, Elena G.   +3 more
core   +1 more source

Hydration-dependent dynamic crossover phenomenon in protein hydration water

Physical Review E, 2014
The characteristic relaxation time τ of protein hydration water exhibits a strong hydration level h dependence. The dynamic crossover is observed when h is higher than the monolayer hydration level hc=0.2-0.25 and becomes more visible as h increases. When h is lower than hc, τ only exhibits Arrhenius behavior in the measured temperature range.
Wang, Zhe, FRATINI, EMILIANO, Li, Mingda, Le, Peisi, Mamontov, Eugene, BAGLIONI, PIERO, Chen, Sow Hsin   +6 more
openaire   +5 more sources