Related ArticlesSlow motions in microcrystalline proteins as observed by MAS-dependent (15)N rotating-frame NMR relaxation.
J Magn Reson. 2014 Sep 20;248C:8-12
Authors: Krushelnitsky A, Zinkevich T, Reif B, Saalwächter K
Abstract
(15)N NMR relaxation rate R1? measurements reveal that a substantial fraction of residues in the microcrystalline chicken alpha-spectrin SH3 domain protein undergoes dynamics in the ?s-ms timescale range. On the basis of a comparison of 2D site-resolved with 1D integrated (15)N spectral intensities, we demonstrate that the significant fraction of broad signals in the 2D spectrum exhibits the most pronounced slow mobility. We show that (15)N R1?'s in proton-diluted protein samples are practically free from the coherent spin-spin contribution even at low MAS rates, and thus can be analysed quantitatively. Moderate MAS rates (10-30kHz) can be more advantageous in comparison with the rates >50-60kHz when slow dynamics are to be identified and quantified by means of R1? experiments.
PMID: 25282442 [PubMed - as supplied by publisher]
[NMR paper] Slow motions in microcrystalline proteins as observed by MAS-dependent 15N rotating-frame NMR relaxation
Slow motions in microcrystalline proteins as observed by MAS-dependent 15N rotating-frame NMR relaxation
Publication date: Available online 20 September 2014
Source:Journal of Magnetic Resonance</br>
Author(s): Alexey Krushelnitsky , Tatiana Zinkevich , Bernd Reif , Kay Saalwächter</br>
15N NMR relaxation rate R 1? measurements reveal that a substantial fraction of residues in the microcrystalline chicken alpha-spectrin SH3 domain protein undergoes dynamics in the ?s - ms timescale range. On the basis of a comparison of 2D site-resolved with 1D integrated 15N...
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Abstract
Protein dynamics on the microsecondâ??millisecond time scales often play a critical role in biological function. NMR relaxation dispersion experiments are powerful approaches for investigating biologically relevant dynamics with site-specific resolution, as shown by a growing number of publications on enzyme catalysis, protein folding, ligand binding, and allostery. To date, the majority of studies has probed the...
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Abstract
Calculating NMR relaxation effects for proteins with dynamics on multiple timescales generally requires very long trajectories based on conventional molecular dynamics simulations. In this report,...
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Slow motions in microcrystalline proteins as observed by MAS-dependent (15)N rotating-frame NMR relaxation.
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