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GeNMR
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From structure:
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From sequence:
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Disordered proteins:
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Format conversion & validation:
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From NMR-STAR 3.1
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NMR sample preparation:
Protein disorder:
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Protein solubility:
camLILA
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Isotope labeling:
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Solid-state NMR:
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Default Immobilization of soluble protein complexes in MAS solid-state NMR: Sedimentation versus viscosity.

Immobilization of soluble protein complexes in MAS solid-state NMR: Sedimentation versus viscosity.

Related Articles Immobilization of soluble protein complexes in MAS solid-state NMR: Sedimentation versus viscosity.

Solid State Nucl Magn Reson. 2016 Mar 15;76-77:7-14

Authors: Sarkar R, Mainz A, Busi B, Barbet-Massin E, Kranz M, Hofmann T, Reif B

Abstract
In recent years, MAS solid-state NMR has emerged as a technique for the investigation of soluble protein complexes. It was found that high molecular weight complexes do not need to be crystallized in order to obtain an immobilized sample for solid-state NMR investigations. Sedimentation induced by sample rotation impairs rotational diffusion of proteins and enables efficient dipolar coupling based cross polarization transfers. In addition, viscosity contributes to the immobilization of the molecules in the sample. Natural Deep Eutectic Solvents (NADES) have very high viscosities, and can replace water in living organisms. We observe a considerable amount of cross polarization transfers for NADES solvents, even though their molecular weight is too low to yield significant sedimentation. We discuss how viscosity and sedimentation both affect the quality of the obtained experimental spectra. The FROSTY/sedNMR approach holds the potential to study large protein complexes, which are otherwise not amenable for a structural characterization using NMR. We show that using this method, backbone assignments of the symmetric proteasome activator complex (1.1MDa), and high quality correlation spectra of non-symmetric protein complexes such as the prokaryotic ribosome 50S large subunit binding to trigger factor (1.4MDa) are obtained.


PMID: 27017576 [PubMed - as supplied by publisher]



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