Issue 6, 2003

Site-specific solvation determined by intermolecular nuclear Overhauser effect—measurements and molecular dynamics

Abstract

Site-specific solvation has been determined by intermolecular NOE measurements between solvent and solute. The experimental effect is shown on the four compounds 2-butanol, L-alanyl-L-tryptophan (Ala-Trp), adenosine and the disodium salt of adenosine 5′-monophosphate (5′-AMP) in the two solvents water and dimethyl sulfoxide (DMSO). The strength of NOE transfer correlates with the average distribution of solvent molecules around the corresponding solvation sites represented by the number of solvent molecules in a first solvation sphere, which can be obtained from molecular dynamics simulations in water. Saturation transfer between exchanging protons explains some deviations from this correlation. The NOE transfer measurements provide information on specific solute–solvent interactions and contribute to a better understanding of solvation phenomena. On the basis of a distinct relationship between steric solvation hindrance and the strength of NOE transfer, the application of such measurements for conformational analysis has been demonstrated for the first time.

Graphical abstract: Site-specific solvation determined by intermolecular nuclear Overhauser effect—measurements and molecular dynamics

Article information

Article type
Paper
Submitted
13 Nov 2002
Accepted
24 Jan 2003
First published
13 Feb 2003

Org. Biomol. Chem., 2003,1, 1049-1052

Site-specific solvation determined by intermolecular nuclear Overhauser effect—measurements and molecular dynamics

M. Angulo, C. Hawat, H. Hofmann and S. Berger, Org. Biomol. Chem., 2003, 1, 1049 DOI: 10.1039/B211134A

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