Add time:08/24/2019         Source:sciencedirect.com

A straightforward heteronuclear pseudo-3D NOESY-HSQC pulse sequence using radiation damping to selectively invert magnetization at the water frequency was developed to estimate the amide proton exchange rates in 15N-labelled proteins. The peak intensities in the resultant 2D spectrum allow a direct classification of amide proton exchange rates according to short (ms), intermediate (ms to s) or long (≥ s) residence times. This method was successfully used for the analysis of amide proton exchange rates in the 15N-labelled FruR DNA-binding domain and pertinent information about its dynamics was obtained.

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