Hydrogen-bond kinetics in the solvation shell of a polypeptide

H Xu, BJ Berne - The Journal of Physical Chemistry B, 2001 - ACS Publications
The Journal of Physical Chemistry B, 2001ACS Publications
Analysis of a series of molecular dynamics simulations reveals that the kinetics of breaking
and forming water− water hydrogen bonds is slower in the first solvation shell of a 16-
residue polypeptide than in bulk water. The correlation time of hydrogen bonds persists
significantly longer near hydrophobic groups than in bulk water. Hydrogen bonds are found
to be stronger in the solvation shell of nonpolar groups. We show that the difference in
hydrogen-bond kinetics in the different environments can be understood in terms of the …
Analysis of a series of molecular dynamics simulations reveals that the kinetics of breaking and forming water−water hydrogen bonds is slower in the first solvation shell of a 16-residue polypeptide than in bulk water. The correlation time of hydrogen bonds persists significantly longer near hydrophobic groups than in bulk water. Hydrogen bonds are found to be stronger in the solvation shell of nonpolar groups. We show that the difference in hydrogen-bond kinetics in the different environments can be understood in terms of the energetics and the concerted forming and breaking of hydrogen bonds.
ACS Publications
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