NMR-based localization of ions involved in salting out of hen egg white lysozyme.

Jarosław Poznański

doi:10.18388/abp.2006_3357

NMR-based localization of ions involved in salting out of hen egg white lysozyme.

Jarosław Poznański Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warszawa, Poland. jarek@ichf.edu.pl;

DOI: https://doi.org/10.18388/abp.2006_3357

Abstract

NaCl-induced aggregation of hen egg white lysozyme (HEWL) was monitored by NMR spectroscopy. Small, but significant, changes induced by salt addition in TOCSY spectra were attributed to the effect of local reorganization of protein backbone upon ion binding. Salt-induced variations in HN and H alpha chemical shifts were mapped on the HEWL 3D structure which allowed the construction of a scheme of the spatial localization of potential ion binding sites. It was found that in a 0.5 M NaCl solution six chloride anions and at least one sodium cation are bound to preferred sites on the HEWL surface.

Published

2006-06-12

Issue

Vol. 53 No. 2 (2006)

Section

Articles

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