Homodimers are the most abundant type of enzyme in cells, and as such, they represent the most elemental system for studying the phenomenon of allostery. In these systems, in which the allosteric features are manifest by the effect of the first binding event on a similar event at the second site, the most informative state is the asymmetric singly bound (lig(1)) form, yet it tends to be thermodynamically elusive. Here we obtain milligram quantities of lig(1) of the allosteric homodimer,...
[NMR paper] Visualizing transient dark states by NMR spectroscopy.
Visualizing transient dark states by NMR spectroscopy.
Visualizing transient dark states by NMR spectroscopy.
Q Rev Biophys. 2015 Feb;48(1):35-116
Authors: Anthis NJ, Clore GM
Abstract
Myriad biological processes proceed through states that defy characterization by conventional atomic-resolution structural biological methods. The invisibility of these 'dark' states can arise from their transient nature, low equilibrium population, large molecular weight, and/or heterogeneity. Although they are invisible, these dark states...
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02-25-2015 05:56 PM
[NMR paper] FTIR, ESI-MS, VT-NMR and SANS study of trehalose thermal stabilization of lysozyme.
FTIR, ESI-MS, VT-NMR and SANS study of trehalose thermal stabilization of lysozyme.
Related Articles FTIR, ESI-MS, VT-NMR and SANS study of trehalose thermal stabilization of lysozyme.
Int J Biol Macromol. 2013 Nov 28;
Authors: Barreca D, Laganą G, Magazł S, Migliardo F, Gattuso G, Bellocco E
Abstract
Protein aggregation is often associated with conformational and structural changes of secondary structure elements that may lead to exposure of some specific residues. Data obtained in our experimental work indicate that trehalose (1.0M)...
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12-03-2013 12:49 PM
W-band orientation selective DEER measurements on a Gd3+/nitroxide mixed-labeled protein dimer with a dual mode cavity
W-band orientation selective DEER measurements on a Gd3+/nitroxide mixed-labeled protein dimer with a dual mode cavity
Available online 12 December 2012
Publication year: 2012
Source:Journal of Magnetic Resonance</br>
</br>
Double electron-electron resonance (DEER) at W-band (95 GHz) was applied to measure the distance between a pair of nitroxide and Gd3+ chelate spin labels, about 6 nm apart, in a homodimer of the protein ERp29. While high-field DEER measurements on systems with such mixed labels can be highly attractive in terms of sensitivity and the potential to...
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12-15-2012 09:51 AM
W-band orientation selective DEER measurements on a Gd3+/nitroxide mixed-labeled protein dimer with a dual mode cavity
W-band orientation selective DEER measurements on a Gd3+/nitroxide mixed-labeled protein dimer with a dual mode cavity
Available online 12 December 2012
Publication year: 2012
Source:Journal of Magnetic Resonance</br>
</br>
Double electron-electron resonance (DEER) at W-band (95 GHz) was applied to measure the distance between a pair of nitroxide and Gd3+ chelate spin labels, about 6 nm apart, in a homodimer of the protein ERp29. While high-field DEER measurements on systems with such mixed labels can be highly attractive in terms of sensitivity and the potential to...
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12-12-2012 08:21 PM
[NMR paper] Prevention of aggregation after refolding by balanced stabilization-destabilization:
Prevention of aggregation after refolding by balanced stabilization-destabilization: production of the Arabidopsis thaliana protein APG8a (At4g21980) for NMR structure determination.
Related Articles Prevention of aggregation after refolding by balanced stabilization-destabilization: production of the Arabidopsis thaliana protein APG8a (At4g21980) for NMR structure determination.
Protein Expr Purif. 2004 Apr;34(2):280-3
Authors: Chae YK, Im H, Zhao Q, Doelling JH, Vierstra RD, Markley JL
The gene coding for APG8a (At4g21980), a protein from...
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11-24-2010 09:51 PM
[NMR paper] Protein stabilization by compatible solutes. Effect of diglycerol phosphate on the dy
Protein stabilization by compatible solutes. Effect of diglycerol phosphate on the dynamics of Desulfovibrio gigas rubredoxin studied by NMR.
Related Articles Protein stabilization by compatible solutes. Effect of diglycerol phosphate on the dynamics of Desulfovibrio gigas rubredoxin studied by NMR.
Eur J Biochem. 2003 Dec;270(23):4606-14
Authors: Lamosa P, Turner DL, Ventura R, Maycock C, Santos H
Heteronuclear NMR relaxation measurements and hydrogen exchange data have been used to characterize protein dynamics in the presence or absence of...
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11-24-2010 09:16 PM
[NMR paper] NMR evidence for progressive stabilization of native-like structure upon aggregation
NMR evidence for progressive stabilization of native-like structure upon aggregation of acid-denatured LysN.
Related Articles NMR evidence for progressive stabilization of native-like structure upon aggregation of acid-denatured LysN.
J Mol Biol. 2000 Jan 14;295(2):239-55
Authors: Alexandrescu AT, Lamour FP, Jaravine VA
The acid-denatured form of the protein LysN aggregates reversibly at pH 2.0. The strength of self-association increases with increasing Cl(-) anion concentration. At low concentrations of protein or Cl(-) anion, resonances of...