Related Experiment Video
Updated: Jan 27, 2026
08:48
High-Resolution Neutron Spectroscopy to Study Picosecond-Nanosecond Dynamics of Proteins and Hydration Water
Published on: April 28, 2022
2.1K
Protein Solvent Shell Structure Provides Rapid Analysis of Hydration Dynamics
Jayangika N Dahanayake1, Elaheh Shahryari1, Kirsten M Roberts1
1Department of Chemistry , Wichita State University , 1845 Fairmount Street , Wichita , Kansas 67260-0051 , United States.
Journal of Chemical Information and Modeling
|March 14, 2019
Summary
Protein hydration dynamics influence function. Faster diffusion in hydration layers correlates with higher radial distribution function (RDF) peaks, enabling rapid analysis of protein-water interactions.
Area of Science:
- Biophysics
- Computational Biology
- Biochemistry
Background:
- The solvation layer is integral to protein structure, dynamics, and function.
- Understanding hydration dynamics' influence on protein function is an emerging area of research.
- Previous simulations suggested a link between regional hydration dynamics and solvation layer structure.
Purpose of the Study:
- To confirm the general correlation between protein hydration dynamics and hydration layer structure across various proteins.
- To develop a rapid analysis method for hydration dynamics using minimal data from molecular dynamics (MD) simulations.
- To establish the minimum information and computational effort needed for reliable hydration dynamics assessment.
Main Methods:
- Utilized radial distribution function (RDF) to analyze water-protein interactions and calculate pairwise entropy.
- Employed Rosenfeld scaling to link diffusion (dynamics) and excess entropy (thermodynamics).
- Applied linear regression modeling to the integral of the hydration layer in the water-protein RDF.
Main Results:
- Confirmed a general correlation between regional diffusive dynamics and hydration layer structure across multiple proteins.
- A linear regression model using RDF integrals yielded statistically equivalent diffusion coefficients.
- RDF analysis of 10 ns simulation data after convergence accurately mapped fast and slow hydration dynamics regions.
Conclusions:
- Radial distribution function (RDF) analysis provides a reliable method to map protein hydration dynamics.
- Comparing RDF peak heights offers a quick qualitative assessment of hydration dynamics.
- This approach facilitates routine analysis of hydration dynamics, aiding the study of biomolecular function.
Related Concept Videos
01:12Solvents
70.5K
A solvent is a substance, most often a liquid, that can dissolve other substances. Here, the substance being dissolved is called a solute. When a solvent and a solute combine, they form a solution - a homogenous mixture of both the solvent and the solute. Water is a universal biological solvent. Its polar structure allows it to dissolve many other polar compounds. The ability of water to dissolve is governed by a balance between water molecules binding to each other and binding to the solute.
A...
A...
70.5K
02:15Protein and Protein Structure
87.4K
Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.
A protein's shape is critical to its function. For example, an enzyme...
A protein's shape is critical to its function. For example, an enzyme...
87.4K
02:42Aqueous Solutions and Heats of Hydration
17.9K
Water and other polar molecules are attracted to ions. The electrostatic attraction between an ion and a molecule with a dipole is called an ion-dipole attraction. These attractions play an important role in the dissolution of ionic compounds in water.
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
17.9K
01:56Structural Protein Function
29.9K
Structural proteins are a category of proteins responsible for functions ranging from cell shape and movement to providing support to major structures such as bones, cartilage, hair, and muscles. This group includes proteins such as collagen, actin, myosin, and keratin.
Collagen, the most abundant protein in mammals, is found throughout the body. In connective tissue, such as skin, ligaments, and tendons, it provides tensile strength and elasticity. In bones and teeth, it mineralizes to...
Collagen, the most abundant protein in mammals, is found throughout the body. In connective tissue, such as skin, ligaments, and tendons, it provides tensile strength and elasticity. In bones and teeth, it mineralizes to...
29.9K
01:56Structural Protein Function
3.3K
3.3K
01:24Hydration of Cement
896
Hydration of cement is a chemical reaction between cement particles and water. This process occurs primarily through two mechanisms: through-solution and topochemical. In the through-solution process, anhydrous compounds dissolve into their constituents, hydrates form in the solution, and then precipitate from the supersaturated solution. The topochemical process involves solid-state reactions at the cement particle surface. The through-solution process dominates the topochemical process at the...
896