Journal of the American Chemical Society (2012). Volume: 134, Issue: 6. Pages: 3178-3189. Alexandar L Hansen, Patrik Lundström, Algirdas Velyvis, Lewis E Kay et al.
A Carr-Purcell-Meiboom-Gill relaxation dispersion experiment is presented for quantifying millisecond time-scale chemical exchange at side-chain (1)H positions in proteins. Such experiments are not possible in a fully protonated molecule because of magnetization evolution from homonuclear scalar couplings that interferes with the extraction of accurate transverse relaxation rates. It is shown, however, that by using a labeling strategy whereby proteins are produced using {(13)C,(1)H}-glucose and D(2)O a significant number of 'isolated' side-chain (1)H spins are generated, eliminating such effects. It thus becomes possible to record (1)H dispersion profiles at the ? positions of Asx, Cys, Ser, His, Phe, Tyr, and Trp as well as the ? positions of Glx, in addition to the methyl side-chain moieties. This brings the total of amino acid side-chain positions that can be simultaneously probed using a single (1)H dispersion experiment to 16. The utility of the approach is demonstrated with an application to the four-helix bundle colicin E7 immunity protein, Im7, which folds via a partially structured low populated intermediate that interconverts with the folded, ground state on the millisecond time-scale. The extracted (1)H chemical shift differences at side-chain positions provide valuable restraints in structural studies of invisible, excited states, complementing backbone chemical shifts that are available from existing relaxation dispersion experiments.
Conformational exchange of aromatic side chains characterized by L-optimized TROSY-selected 13C CPMG relaxation dispersion
Conformational exchange of aromatic side chains characterized by L-optimized TROSY-selected 13C CPMG relaxation dispersion
Abstract Protein dynamics on the millisecond time scale commonly reflect conformational transitions between distinct functional states. NMR relaxation dispersion experiments have provided important insights into biologically relevant dynamics with site-specific resolution, primarily targeting the protein backbone and methyl-bearing side chains. Aromatic side chains represent attractive probes of protein dynamics because they are over-represented in protein binding...
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07-30-2012 07:42 AM
Quantifying Millisecond Exchange Dynamics in Proteins by CPMG Relaxation Dispersion NMR Using Side-Chain 1H Probes
Quantifying Millisecond Exchange Dynamics in Proteins by CPMG Relaxation Dispersion NMR Using Side-Chain 1H Probes
Alexandar L. Hansen, Patrik Lundstrom, Algirdas Velyvis and Lewis E. Kay
http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/0/jacsat.ahead-of-print/ja210711v/aop/images/medium/ja-2011-10711v_0008.gif
Journal of the American Chemical Society
DOI: 10.1021/ja210711v
http://feeds.feedburner.com/~ff/acs/jacsat?d=yIl2AUoC8zA
http://feeds.feedburner.com/~r/acs/jacsat/~4/jaMjjnA_QTw
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02-03-2012 09:50 AM
Microsecond Time-Scale Conformational Exchange in Proteins: Using Long Molecular Dynamics Trajectory To Simulate NMR Relaxation Dispersion Data
Microsecond Time-Scale Conformational Exchange in Proteins: Using Long Molecular Dynamics Trajectory To Simulate NMR Relaxation Dispersion Data
Yi Xue, Joshua M. Ward, Tairan Yuwen, Ivan S. Podkorytov and Nikolai R. Skrynnikov
http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/0/jacsat.ahead-of-print/ja206442c/aop/images/medium/ja-2011-06442c_0001.gif
Journal of the American Chemical Society
DOI: 10.1021/ja206442c
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http://feeds.feedburner.com/~r/acs/jacsat/~4/NvRRKHU2H3k
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01-28-2012 05:27 AM
Quantifying millisecond time-scale exchange in proteins by CPMG relaxation dispersion NMR spectroscopy of side-chain carbonyl groups
Quantifying millisecond time-scale exchange in proteins by CPMG relaxation dispersion NMR spectroscopy of side-chain carbonyl groups
Abstract A new pulse sequence is presented for the measurement of relaxation dispersion profiles quantifying millisecond time-scale exchange dynamics of side-chain carbonyl groups in uniformly 13C labeled proteins. The methodology has been tested using the 87-residue colicin E7 immunity protein, Im7, which is known to fold via a partially structured low populated intermediate that interconverts with the folded, ground state on the millisecond time-scale....
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06-20-2011 03:31 PM
Quantifying millisecond time-scale exchange in proteins by CPMG relaxation dispersion NMR spectroscopy of side-chain carbonyl groups.
Quantifying millisecond time-scale exchange in proteins by CPMG relaxation dispersion NMR spectroscopy of side-chain carbonyl groups.
Quantifying millisecond time-scale exchange in proteins by CPMG relaxation dispersion NMR spectroscopy of side-chain carbonyl groups.
J Biomol NMR. 2011 Jun 18;
Authors: Hansen AL, Kay LE
A new pulse sequence is presented for the measurement of relaxation dispersion profiles quantifying millisecond time-scale exchange dynamics of side-chain carbonyl groups in uniformly (13)C labeled proteins. The methodology has...
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06-18-2011 01:10 PM
[NMR paper] Main chain and side chain dynamics of a heme protein: 15N and 2H NMR relaxation studi
Main chain and side chain dynamics of a heme protein: 15N and 2H NMR relaxation studies of R. capsulatus ferrocytochrome c2.
Related Articles Main chain and side chain dynamics of a heme protein: 15N and 2H NMR relaxation studies of R. capsulatus ferrocytochrome c2.
Biochemistry. 2001 Jun 5;40(22):6559-69
Authors: Flynn PF, Bieber Urbauer RJ, Zhang H, Lee AL, Wand AJ
A detailed characterization of the main chain and side chain dynamics in R. capsulatus ferrocytochrome c(2) derived from (2)H NMR relaxation of methyl group resonances is...
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11-19-2010 08:32 PM
13CHD2 Methyl Group Probes of Millisecond Time Scale Exchange in Proteins by 1H Relax
http://pubs.acs.org//appl/literatum/publisher/achs/journals/content/jacsat/2010/jacsat.2010.132.issue-32/ja104578n/production/images/medium/ja-2010-04578n_0005.gif
<!-- abstract content --><sup>13</sup>CHD<sub>2</sub> Methyl Group Probes of Millisecond Time Scale Exchange in Proteins by <sup>1</sup>H Relaxation Dispersion: An Application to Proteasome Gating Residue Dynamics
Andrew J. Baldwin, Tomasz L. Religa, D. Flemming Hansen, Guillaume Bouvignies and Lewis E. Kay*
Departments of Molecular Genetics, Biochemistry and Chemistry,...
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08-14-2010 05:56 AM
Suite of Six NMR Relaxation Dispersion Experiments to Study Multiple-Site Exchange in Proteins
http://pubs.acs.org/isubscribe/journals/jacsat/127/i44/figures/ja054550en00001.gif
Multiple-Site Exchange in Proteins Studied with a Suite of Six NMR Relaxation Dispersion Experiments: An Application to the Folding of a Fyn SH3 Domain Mutant
Dmitry M. Korzhnev, Philipp Neudecker, Anthony Mittermaier, Vladislav Yu. Orekhov, and Lewis E. Kay*
Contribution from the Departments of Medical Genetics, Biochemistry, and Chemistry, The University of Toronto, Toronto, Ontario M5S 1A8, Canada, and Swedish NMR Center at Göteborg University, Box 465, 405 30 Göteborg, Sweden
J. Am. Chem....
Quantifying Millisecond Exchange Dynamics in Proteins by CPMG Relaxation Dispersion NMR Using Side-Chain (1)H Probes.
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