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Title: Description of Hydration Water in Protein (Green Fluorescent Protein) Solution

Journal Article · · Journal of the American Chemical Society
DOI:https://doi.org/10.1021/jacs.6b08845· OSTI ID:1341561
 [1];  [2];  [3];  [4];  [3];  [3];  [5];  [3];  [1];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Shull Wollan Center and Biology and Soft Matter Division
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Biology and Soft Matter Division
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical and Engineering Materials Division
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Molecular Biophysics

The structurally and dynamically perturbed hydration shells that surround proteins and biomolecules have a substantial influence upon their function and stability. This makes the extent and degree of water perturbation of practical interest for general biological study and industrial formulation. Here, we present an experimental description of the dynamical perturbation of hydration water around green fluorescent protein in solution. Less than two shells (~5.5 Å) were perturbed, with dynamics a factor of 2–10 times slower than bulk water, depending on their distance from the protein surface and the probe length of the measurement. Furthermore, this dependence on probe length demonstrates that hydration water undergoes subdiffusive motions (τ ∝ q–2.5 for the first hydration shell, τ ∝ q–2.3 for perturbed water in the second shell), an important difference with neat water, which demonstrates diffusive behavior (τ ∝ q–2). Our results help clarify the seemingly conflicting range of values reported for hydration water retardation as a logical consequence of the different length scales probed by the analytical techniques used.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1341561
Journal Information:
Journal of the American Chemical Society, Vol. 139, Issue 3; ISSN 0002-7863
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 60 works
Citation information provided by
Web of Science

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Cited By (11)

Protein Backbone and Average Particle Dynamics in Reconstituted Discoidal and Spherical HDL Probed by Hydrogen Deuterium Exchange and Elastic Incoherent Neutron Scattering journal January 2020
Analysis of elastic incoherent neutron scattering data beyond the Gaussian approximation journal December 2018
Neutron scattering in the biological sciences: progress and prospects journal December 2018
Conceptual design of CHESS, a new direct-geometry inelastic neutron spectrometer dedicated to studying small samples journal March 2018
Thermally induced conformational changes and protein–protein interactions of bovine serum albumin in aqueous solution under different pH and ionic strengths as revealed by SAXS measurements journal January 2017
Molecular motions, structure and hydration behaviour of glucose oligomers in aqueous solution journal January 2019
Examination of ethanol interactions with Trp-cage peptide through MD simulations and intermolecular nuclear Overhauser effects journal February 2018
The synergic effect of water and biomolecules in intracellular phase separation journal July 2019
Dynamics of water bound to crystalline cellulose journal September 2017
Gradual Crossover from Subdiffusion to Normal Diffusion: A Many-Body Effect in Protein Surface Water journal June 2018
In Silico Studies of Small Molecule Interactions with Enzymes Reveal Aspects of Catalytic Function journal July 2017

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