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Default Pinpoint analysis of a protein in slow exchange using F 1 F 2 -selective ZZ-exchange spectroscopy: assignment and kinetic analysis

Pinpoint analysis of a protein in slow exchange using F 1 F 2 -selective ZZ-exchange spectroscopy: assignment and kinetic analysis

Abstract

ZZ-exchange spectroscopy is widely used to study slow exchange processes in biomolecules, especially determination of exchange rates and assignment of minor peaks. However, if the exchange cross peaks overlap or the populations are skewed, kinetic analysis is hindered. In order to analyze slow exchange protein dynamics under such conditions, here we have developed a new method by combining ZZ-exchange and F1F2-selective NMR spectroscopy. We demonstrate the utility of this method by examining the monomerÔ??dimer transition of the ubiquitin-associated domain of p62, successfully assigning the minor (monomeric) peaks and obtaining the exchange rates, which cannot be achieved by ZZ-exchange alone.



Source: Journal of Biomolecular NMR
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