Publication date: April 2014 Source:Journal of Magnetic Resonance, Volume 241
Author(s): Arthur G. Palmer III
The perspective reviews quantitative investigations of chemical exchange phenomena in proteins and other biological macromolecules using NMR spectroscopy, particularly relaxation dispersion methods. The emphasis is on techniques and applications that quantify the populations, interconversion kinetics, and structural features of sparsely populated conformational states in equilibrium with a highly populated ground state. Applications to folding, molecular recognition, catalysis, and allostery by proteins and nucleic acids are highlighted. Graphical abstract
Present and future of NMR for RNA–protein complexes: A perspective of integrated structural biology
Present and future of NMR for RNA–protein complexes: A perspective of integrated structural biology
Publication date: April 2014
Source:Journal of Magnetic Resonance, Volume 241</br>
Author(s): Teresa Carlomagno</br>
Nucleic acids are gaining enormous importance as key molecules in almost all biological processes. Most nucleic acids do not act in isolation but are generally associated with proteins to form high-molecular-weight nucleoprotein complexes. In this perspective article I focus on the structural studies of supra-molecular ribonucleoprotein (RNP) assemblies...
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03-21-2014 12:52 AM
[U. of Ottawa NMR Facility Blog] Chemical Exchange Agents to Simplify NMR Spectra
Chemical Exchange Agents to Simplify NMR Spectra
One can simplify 1H NMR spectra by eliminating exchangeable proton signals. This is most commonly done by adding a drop or two of D2O to the NMR sample. An example of this can be seen in a previous post. The deuterium from the D2O replaces the exchangeable protons (-OH, -NH, -NH2, -COOH) of the sample and their 1H signals disappear. The disadvantage of this technique is the introduction of a strong HDO signal which may overlap with other signals in the spectrum and thereby hinder the interpretation.
An alternative of the "D2O shake"...
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03-12-2014 01:10 AM
[NMR paper] NMR Spectroscopy on Domain Dynamics in Biomacromolecules.
NMR Spectroscopy on Domain Dynamics in Biomacromolecules.
Related Articles NMR Spectroscopy on Domain Dynamics in Biomacromolecules.
Prog Biophys Mol Biol. 2013 May 15;
Authors: Shapiro YE
Abstract
Domain dynamics in biomacromolecules is currently an area of intense research because of its importance for understanding the huge quantity of available data relating the structure and function of proteins and nucleic acids. Control of structural flexibility is essential for the proper functioning of the biomacromolecules. Biophysical...
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05-21-2013 02:34 PM
[NMR paper] The present and future of solution NMR in investigating the structure and dynamics of channels and transporters.
The present and future of solution NMR in investigating the structure and dynamics of channels and transporters.
The present and future of solution NMR in investigating the structure and dynamics of channels and transporters.
Curr Opin Struct Biol. 2013 Apr 26;
Authors: Oxenoid K, Chou JJ
Abstract
Membrane channels, transporters and receptors constitute essential means for cells to maintain homeostasis and communicate with the surroundings. Investigation of their molecular architecture and the dynamic process of transporting substrate or...
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05-01-2013 11:46 AM
[Question from NMRWiki Q&A forum] Software to calculate chemical exchange lineshape
Software to calculate chemical exchange lineshape
Are there any modern programs (preferably freeware) that will simulate line broadening in the presence of exchange. Somewhere I have a copy of "DNMR3" (on a 5 1/4 " floppy) and I feel it will be a nightmare trying to get this to work (particularly the graphics output).
Check if somebody has answered this question on NMRWiki QA forum
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News from other NMR forums
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04-10-2013 07:05 AM
[NMR paper] Probing Slow Chemical Exchange at Carbonyl Sites in Proteins by Chemical Exchange Saturation Transfer NMR Spectroscopy.
Probing Slow Chemical Exchange at Carbonyl Sites in Proteins by Chemical Exchange Saturation Transfer NMR Spectroscopy.
Probing Slow Chemical Exchange at Carbonyl Sites in Proteins by Chemical Exchange Saturation Transfer NMR Spectroscopy.
Angew Chem Int Ed Engl. 2013 Feb 28;
Authors: Vallurupalli P, Kay LE
Abstract
Seeing the invisible: A 13 CO NMR chemical exchange saturation transfer (CEST) experiment for the study of "invisible" excited protein states with lifetimes on the order of 5-50 ms has been developed. The 13 CO chemical...
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03-02-2013 11:45 AM
NMR Spectroscopy: Past Papers
NMR Spectroscopy: Past Papers
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NMR Spectroscopy: Past Papers
Questions on the topics from several Examining Boards over 5 or more consecutive papers. Try them out before looking at the solutions. Frank Scullion Presentation and Production: Frank Scullion
From:Franklychemistry
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NMR educational videos
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03-21-2012 11:38 AM
TROSY-selected ZZ-exchange experiment for characterizing slow chemical exchange in large proteins
TROSY-selected ZZ-exchange experiment for characterizing slow chemical exchange in large proteins
Abstract A TROSY-selected ZZ-exchange experiment is described for measuring slow chemical exchange rates by monitoring the TROSY component of 15N longitudinal magnetization. Application of the proposed pulse sequence to the cadherin 8 N-terminal extracelluar domain demonstrates that enhanced sensitivity is obtained, compared to a previously described TROSY-detected ZZ-exchange sequence (Sahu et al. J Am Chem Soc 129: 13232â??13237, 2007), by preserving the TROSY effect during the mixing...