Related ArticlesElucidating the folding problem of alpha-helices: local motifs, long-range electrostatics, ionic-strength dependence and prediction of NMR parameters.
J Mol Biol. 1998 Nov 20;284(1):173-91
Authors: Lacroix E, Viguera AR, Serrano L
The information about the conformational behavior of monomeric helical peptides in solution, as well as the alpha-helix stability in proteins, has been previously utilized to derive a database with the energy contributions for various interactions taking place in an alpha-helix: intrinsic helical propensities, side-chain-side-chain interactions, main-chain-main-chain hydrogen bonds, and capping effects. This database was implemented in an algorithm based on the helix/coil transition theory (AGADIR). Here, we have modified this algorithm to include previously described local motifs: hydrophobic staple, Schellman motif and Pro-capping motif, new variants of these, and newly described side-chain-side-chain interactions. Based on recent experimental data we have introduced a position dependence of the helical propensities for some of the 20 amino acid residues. A new electrostatic model that takes into consideration all electrostatic interactions up to 12 residues in distance in the helix and random-coil conformations, as well as the effect of ionic strength, has been implemented. We have synthesized and analyzed several peptides, and used data from peptides already analysed by other groups, to test the validity of our electrostatic model. The modified algorithm predicts, with an overall standard deviation value of 6.6 (maximum helix is 100%), the helical, content of 778 peptides of which 223 correspond to wild-type and modified protein fragments. To improve the prediction potential of the algorithm and to have a direct comparison with nuclear magnetic resonance data, the algorithm now predicts the conformational shift of the CalphaH protons, 13Calpha and 3JalphaN values. We have found that for those peptides correctly predicted from the point of view of circular dichroism, the prediction of the NMR parameters is very good.
Backbone assignment of perdeuterated proteins using long-range H/C-dipolar transfers
Backbone assignment of perdeuterated proteins using long-range H/C-dipolar transfers
Abstract For micro-crystalline proteins, solid-state nuclear magnetic resonance spectroscopy of perdeuterated samples can provide spectra of unprecedented quality. Apart from allowing to detect sparsely introduced protons and thereby increasing the effective resolution for a series of sophisticated techniques, deuteration can provide extraordinary coherence lifetimesâ??obtainable for all involved nuclei virtually without decoupling and enabling the use of scalar magnetization transfers. Unfortunately,...
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Interaction Tensors and Local Dynamics in Common Structural Motifs of Nitrogen: A Solid-State 14N NMR and DFT Study
Interaction Tensors and Local Dynamics in Common Structural Motifs of Nitrogen: A Solid-State 14N NMR and DFT Study
Luke A. O’Dell, Robert W. Schurko, Kristopher J. Harris, Jochen Autschbach and Christopher I. Ratcliffe
http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/0/jacsat.ahead-of-print/ja108181y/aop/images/medium/ja-2010-08181y_0020.gif
Journal of the American Chemical Society
DOI: 10.1021/ja108181y
http://feeds.feedburner.com/~ff/acs/jacsat?d=yIl2AUoC8zA
http://feeds.feedburner.com/~r/acs/jacsat/~4/RPRAYPgAJxo
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[NMR paper] Mapping long-range interactions in alpha-synuclein using spin-label NMR and ensemble
Mapping long-range interactions in alpha-synuclein using spin-label NMR and ensemble molecular dynamics simulations.
Related Articles Mapping long-range interactions in alpha-synuclein using spin-label NMR and ensemble molecular dynamics simulations.
J Am Chem Soc. 2005 Jan 19;127(2):476-7
Authors: Dedmon MM, Lindorff-Larsen K, Christodoulou J, Vendruscolo M, Dobson CM
The intrinsically disordered protein alpha-synuclein plays a key role in the pathogenesis of Parkinson's disease (PD). We show here that the native state of alpha-synuclein...
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[NMR paper] 2D solid state NMR spectral simulation of 3(10), alpha, and pi-helices.
2D solid state NMR spectral simulation of 3(10), alpha, and pi-helices.
Related Articles 2D solid state NMR spectral simulation of 3(10), alpha, and pi-helices.
J Magn Reson. 2004 Jun;168(2):187-93
Authors: Kim S, Cross TA
Transmembrane helices are more uniform in structure than similar helices in water soluble proteins. Solid state NMR of aligned bilayer samples is being increasingly used to characterize helical membrane protein structures. Traditional spectroscopic methods have difficulty distinguishing between helices with i to i + 3...
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[NMR paper] Measurement of long-range cross-correlation rates using a combination of single- and
Measurement of long-range cross-correlation rates using a combination of single- and multiple-quantum NMR spectroscopy in one experiment.
Related Articles Measurement of long-range cross-correlation rates using a combination of single- and multiple-quantum NMR spectroscopy in one experiment.
J Am Chem Soc. 2002 Apr 17;124(15):4050-7
Authors: Fruh D, Chiarparin E, Pelupessy P, Bodenhausen G
A method is described to determine long-range cross-correlations between the modulations of an anisotropic chemical shift (e.g., of a C' carbonyl carbon in...
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[NMR paper] De novo determination of protein structure by NMR using orientational and long-range
De novo determination of protein structure by NMR using orientational and long-range order restraints.
Related Articles De novo determination of protein structure by NMR using orientational and long-range order restraints.
J Mol Biol. 2000 May 19;298(5):927-36
Authors: Hus JC, Marion D, Blackledge M
Orientational and novel long-range order restraints available from paramagnetic systems have been used to determine the backbone solution structure of the cytochrome c' protein to atomic resolution in the complete absence of restraints derived from...
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[NMR paper] Defining long range order in NMR structure determination from the dependence of heter
Defining long range order in NMR structure determination from the dependence of heteronuclear relaxation times on rotational diffusion anisotropy.
Related Articles Defining long range order in NMR structure determination from the dependence of heteronuclear relaxation times on rotational diffusion anisotropy.
Nat Struct Biol. 1997 Jun;4(6):443-9
Authors: Tjandra N, Garrett DS, Gronenborn AM, Bax A, Clore GM
Structure determination by NMR presently relies on short range restraints between atoms in close spatial proximity, principally in the...
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[NMR paper] Defining long range order in NMR structure determination from the dependence of heter
Defining long range order in NMR structure determination from the dependence of heteronuclear relaxation times on rotational diffusion anisotropy.
Related Articles Defining long range order in NMR structure determination from the dependence of heteronuclear relaxation times on rotational diffusion anisotropy.
Nat Struct Biol. 1997 Jun;4(6):443-9
Authors: Tjandra N, Garrett DS, Gronenborn AM, Bax A, Clore GM
Structure determination by NMR presently relies on short range restraints between atoms in close spatial proximity, principally in the...
Elucidating the folding problem of alpha-helices: local motifs, long-range electrosta
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