[Question from NMRWiki Q&A forum] High Pressure NMR Samples
High Pressure NMR Samples
I need to run NMR on samples of anhydrous ammonia. The boiling point of anhydrous ammonia is -33.34 deg C. In order to be able to have enough time to acquire spectra, I would like to seal the NMR tubes. Once the sample tubes are sealed, the ammonia will build up pressure until it reaches equilibrium and exists as a liquid at room temperature (at approximately 10 atm of pressure). I know NMR tubes exist which can easily withstand these sorts of pressures, but my main problem is in finding a way to seal the tube. I have tried sealing the tubes by melting the...
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02-23-2012 09:08 PM
High-Pressure Protein Crystallography and NMR to Explore Protein Conformations.
High-Pressure Protein Crystallography and NMR to Explore Protein Conformations.
High-Pressure Protein Crystallography and NMR to Explore Protein Conformations.
Annu Rev Biophys. 2010 Jul 21;
Authors: Collins MD, Kim CU, Gruner SM
High-pressure methods for solving protein structures by X-ray crystallography and NMR are maturing. These techniques are beginning to impact our understanding of thermodynamic and structural features that define not only the protein's native conformation, but also the higher free energy conformations. The ability of...
nmrlearner
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02-02-2011 02:40 AM
[NMR paper] High-pressure NMR spectroscopy for characterizing folding intermediates and denatured
High-pressure NMR spectroscopy for characterizing folding intermediates and denatured states of proteins.
Related Articles High-pressure NMR spectroscopy for characterizing folding intermediates and denatured states of proteins.
Methods. 2004 Sep;34(1):133-43
Authors: Kamatari YO, Kitahara R, Yamada H, Yokoyama S, Akasaka K
Extensive structural studies using high-pressure NMR spectroscopy have recently been carried out on proteins, which potentially contribute to our understanding of the mechanisms of protein folding. Pressure shifts the...
nmrlearner
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11-24-2010 10:01 PM
[NMR paper] Two folded conformers of ubiquitin revealed by high-pressure NMR.
Two folded conformers of ubiquitin revealed by high-pressure NMR.
Related Articles Two folded conformers of ubiquitin revealed by high-pressure NMR.
Biochemistry. 2001 Nov 13;40(45):13556-63
Authors: Kitahara R, Yamada H, Akasaka K
High-pressure 15N/1H two-dimensional NMR spectroscopy has been utilized to study conformational fluctuation of a 76-residue protein ubiquitin at pH 4.5 at 20 degrees C. The on-line variable pressure cell technique is used in conjunction with a high-field NMR spectrometer operating at 750 MHz for 1H in the pressure...
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11-19-2010 08:44 PM
[NMR paper] High pressure NMR study of a small protein, gurmarin.
High pressure NMR study of a small protein, gurmarin.
Related Articles High pressure NMR study of a small protein, gurmarin.
J Biomol NMR. 1998 Nov;12(4):535-41
Authors: Inoue K, Yamada H, Imoto T, Akasaka K
The effect of pressure on the structure of gurmarin, a globular, 35-residue protein from Gymnema sylvestre, was studied in aqueous environment (95% 1H2O/5% 2H2O, pH 2.0) with an on-line variable pressure NMR system operating at 750 MHz. Two-dimensional TOCSY and NOESY spectra were measured as functions of pressure between 1 and 2000 bar at...
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11-17-2010 11:15 PM
[NMR images] High pressure NMR spectroscopy
http://www.biologie.uni-regensburg.de/Biophysik/Kalbitzer/c2c/Grafik/pArnold_1.jpg
biologie.uni-regensburg.de
1/11/2010 8:48:44 AM GMT
High pressure NMR spectroscopy
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nmrlearner
NMR pictures
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11-01-2010 09:23 AM
[NMR paper] Membrane protein structure: the contribution and potential of novel solid state NMR a
Membrane protein structure: the contribution and potential of novel solid state NMR approaches.
Related Articles Membrane protein structure: the contribution and potential of novel solid state NMR approaches.
Mol Membr Biol. 1995 Jul-Sep;12(3):233-46
Authors: Watts A, Ulrich AS, Middleton DA
Alternative methods for describing molecular detail for large integral membrane proteins are required in the absence of routine crystallographic approaches. Novel solid state NMR methods, devised for the study of large molecular assemblies, are now finding...
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08-22-2010 03:41 AM
[NMR paper] High-resolution NMR study of the pressure-induced unfolding of lysozyme.
High-resolution NMR study of the pressure-induced unfolding of lysozyme.
Related Articles High-resolution NMR study of the pressure-induced unfolding of lysozyme.
Biochemistry. 1992 Sep 1;31(34):7773-8
Authors: Samarasinghe SD, Campbell DM, Jonas A, Jonas J
The pressure-induced reversible unfolding of lysozyme was investigated by high-resolution proton magnetic resonance spectroscopy by following the proton spectra of the following residues: His-15 epsilon 1, Trp-28 epsilon 3, Leu-17 delta 2, Cys-64 alpha, and Trp-108 epsilon 3. The...
Assessing the Contribution of Cavity Density to Protein Partial Molar Expansivity by High-Pressure NMR
Linear Mode
