Contribution of protein conformational heterogeneity to NMR lineshapes at cryogenic temperatures
Contribution of protein conformational heterogeneity to NMR lineshapes at cryogenic temperatures
Xu YiKeith J. FritzschingRivkah RogawskiYunyao XuAnn E. McDermottaDepartment of Chemistry, Columbia University, New York, NY 1002...
Date:
Proceedings of the National Academy of Sciences, Volume 121, Issue 8, February 2024.
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02-21-2024 11:12 PM
[NMR paper] Contribution of protein conformational heterogeneity to NMR lineshapes at cryogenic temperatures
Contribution of protein conformational heterogeneity to NMR lineshapes at cryogenic temperatures
While low-temperature Nuclear Magnetic Resonance (NMR) holds great promise for the analysis of unstable samples and for sensitizing NMR detection, spectral broadening in frozen protein samples is a common experimental challenge. One hypothesis explaining the additional linewidth is that a variety of conformations are in rapid equilibrium at room temperature and become frozen, creating an inhomogeneous distribution at cryogenic temperatures. Here, we investigate conformational heterogeneity...
[NMR paper] Contribution of protein conformational heterogeneity to NMR lineshapes at cryogenic temperatures
Contribution of protein conformational heterogeneity to NMR lineshapes at cryogenic temperatures
While low temperature NMR holds great promise for the analysis of unstable samples and for sensitizing NMR detection, spectral broadening in frozen protein samples is a common experimental challenge. One hypothesis explaining the additional linewidth is that a variety of conformations are in rapid equilibrium at room temperature and become frozen, creating an inhomogeneous distribution at cryogenic temperatures. Here we investigate conformational heterogeneity by measuring the backbone...
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02-07-2023 04:23 PM
Anisotropic longitudinal electronic relaxation affects DNP at cryogenic temperatures #DNPNMR
From The DNP-NMR Blog:
Anisotropic longitudinal electronic relaxation affects DNP at cryogenic temperatures #DNPNMR
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Weber, E.M.M., et al., Anisotropic longitudinal electronic relaxation affects DNP at cryogenic temperatures. Phys. Chem. Chem. Phys., 2017. 19(24): p. 16087-16094.
https://www.ncbi.nlm.nih.gov/pubmed/28598474
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12-18-2017 11:19 PM
Anisotropic longitudinal electronic relaxation affects DNP at cryogenic temperatures #DNPNMR
From The DNP-NMR Blog:
Anisotropic longitudinal electronic relaxation affects DNP at cryogenic temperatures #DNPNMR
Anisotropic relaxation effects are well know and understood in EPR spectroscopy and have long served as measures to understand the motion (libration) of paramagnetic co-factors (quinones, nitroxide radicals etc.) in biological system. In this study the authors investigate the effect of anisotropic relaxation effects in DNP experiments.
To find more about anisotropic relaxation effects studied by EPR take a look at the work by Sergei Dzuba or the Eatons:
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11-13-2017 03:03 PM
Phenylazide Hybrid-Silica - Polarization Platform for Dynamic Nuclear Polarization at Cryogenic Temperatures #DNPNMR
From The DNP-NMR Blog:
Phenylazide Hybrid-Silica - Polarization Platform for Dynamic Nuclear Polarization at Cryogenic Temperatures #DNPNMR
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Grüning, W.R., et al., Phenylazide Hybrid-Silica - Polarization Platform for Dynamic Nuclear Polarization at Cryogenic Temperatures. Helvetica Chimica Acta, 2016: p. n/a-n/a.
http://dx.doi.org/10.1002/hlca.201600122
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11-19-2016 08:35 PM
Conformational Disorder of Membrane Peptides Investigated from Solid-State NMR Linewidths and Lineshapes.
Conformational Disorder of Membrane Peptides Investigated from Solid-State NMR Linewidths and Lineshapes.
Conformational Disorder of Membrane Peptides Investigated from Solid-State NMR Linewidths and Lineshapes.
J Phys Chem B. 2011 Aug 1;
Authors: Su Y, Hong M
A challenge in the application of solid-state NMR spectroscopy to membrane proteins and peptides is the relatively broad linewidths compared to solution NMR spectra. To understand the linewidth contributions to membrane protein spectra, we have measured the inhomogeneous and homogeneous...