Related ArticlesSimulated and NMR-derived backbone dynamics of a protein with significant flexibility: a comparison of spectral densities for the betaARK1 PH domain.
J Am Chem Soc. 2001 Apr 4;123(13):3021-36
Authors: Pfeiffer S, Fushman D, Cowburn D
A 7.6 ns molecular dynamics trajectory of the betaARK1 PH domain in explicit water with appropriate ions was calculated at 300 K. Spectral densities at omega = 0, omega(N), and 0.87omega(H) and the model-free parameters were evaluated from the experimental as well as the simulated data, taking the anisotropic overall motion of the protein into account. Experimental and simulated spectral densities are in reasonable general agreement for NH bond vectors, where the corresponding motions have converged within the simulation time. A sufficient sampling of the motions for NH bonds within flexible parts of the protein requires a longer simulation time. The simulated spectral densities J(0) and J(omega(N)) are, on average, 4.5% and 16% lower than the experimental data; the corresponding numbers for the core residues are about 6%; the high-frequency spectral densities J(0.87omega(H)) are lower by, on average, 16% (21% for the core). The simulated order parameters, S(2), are also lower, although the overall disagreement between the simulation and experiment is less pronounced: 1% for all residues and 6% for the core. The observed systematic decrease of simulated spectral density and the order parameters compared to the experimental data can be partially attributed to the ultrafast librational motion of the NH bonds with respect to their peptide plane, which was analyzed in detail. This systematic difference is most pronounced for J(0.87omega(H)), which appears to be most sensitive to the slow, subnanosecond time scale of internal motion, whereas J(0) and J(omega(N)) are dominated by the overall rotational tumbling of the protein. Similar discrepancies are observed between the experimentally measured (15)N relaxation parameters (R(1), R(2), NOE) and their values calculated from the simulated spectral densities. The analysis of spectral densities provides additional information regarding the comparison of the simulated and experimental data, not available from the model-free analysis.
A Large-scale Comparison of Computational Models on the Residue Flexibility for NMR-derived Proteinss.
A Large-scale Comparison of Computational Models on the Residue Flexibility for NMR-derived Proteinss.
A Large-scale Comparison of Computational Models on the Residue Flexibility for NMR-derived Proteinss.
Protein Pept Lett. 2011 Sep 20;
Authors: Zhang H, Shi H, Hanlon M
Abstract
As an alternative to X-ray crystallography, nuclear magnetic resonance (NMR) has also emerged as the method of choice for studying both protein structure and dynamics in solution. However, little work using computational models such as Gaussian network model...
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09-22-2011 04:25 PM
Comparative analysis of essential collective dynamics and NMR-derived flexibility profiles in evolutionarily diverse prion proteins.
Comparative analysis of essential collective dynamics and NMR-derived flexibility profiles in evolutionarily diverse prion proteins.
Comparative analysis of essential collective dynamics and NMR-derived flexibility profiles in evolutionarily diverse prion proteins.
Prion. 2011 Jul 1;5(3)
Authors: Santo KP, Berjanskii M, Wishart DS, Stepanova M
Abstract
Collective motions on ns-?s time scales are known to have a major impact on protein folding, stability, binding and enzymatic efficiency. It is also believed that these motions may have an...
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08-27-2011 04:53 PM
RDC derived protein backbone resonance assignment using fragment assembly
RDC derived protein backbone resonance assignment using fragment assembly
Abstract Experimental residual dipolar couplings (RDCs) in combination with structural models have the potential for accelerating the protein backbone resonance assignment process because RDCs can be measured accurately and interpreted quantitatively. However, this application has been limited due to the need for very high-resolution structural templates. Here, we introduce a new approach to resonance assignment based on optimal agreement between the experimental and calculated RDCs from a structural template that...
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12-31-2010 08:38 PM
[NMR paper] Molecular dynamics simulations of protein G challenge NMR-derived correlated backbone
Molecular dynamics simulations of protein G challenge NMR-derived correlated backbone motions.
Related Articles Molecular dynamics simulations of protein G challenge NMR-derived correlated backbone motions.
Angew Chem Int Ed Engl. 2005 May 30;44(22):3394-9
Authors: Lange OF, Grubmüller H, de Groot BL
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[NMR paper] Comparison of protein backbone entropy and beta-sheet stability: NMR-derived dynamics
Comparison of protein backbone entropy and beta-sheet stability: NMR-derived dynamics of protein G B1 domain mutants.
Related Articles Comparison of protein backbone entropy and beta-sheet stability: NMR-derived dynamics of protein G B1 domain mutants.
J Am Chem Soc. 2001 Jan 10;123(1):185-6
Authors: Stone MJ, Gupta S, Snyder N, Regan L
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11-19-2010 08:32 PM
[NMR paper] Simulated annealing with restrained molecular dynamics using a flexible restraint pot
Simulated annealing with restrained molecular dynamics using a flexible restraint potential: theory and evaluation with simulated NMR constraints.
http://www.ncbi.nlm.nih.gov/corehtml/query/egifs/http:--www3.interscience.wiley.com-aboutus-images-wiley_interscience_pubmed_logo_FREE_120x27.gif http://www.ncbi.nlm.nih.gov/corehtml/query/egifs/http:--www.pubmedcentral.nih.gov-corehtml-pmc-pmcgifs-pubmed-pmc.gif Related Articles Simulated annealing with restrained molecular dynamics using a flexible restraint potential: theory and evaluation with simulated NMR constraints.
...
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08-22-2010 02:27 PM
[NMR paper] Simulated annealing with restrained molecular dynamics using CONGEN: energy refinemen
Simulated annealing with restrained molecular dynamics using CONGEN: energy refinement of the NMR solution structures of epidermal and type-alpha transforming growth factors.
http://www.ncbi.nlm.nih.gov/corehtml/query/egifs/http:--www3.interscience.wiley.com-aboutus-images-wiley_interscience_pubmed_logo_FREE_120x27.gif http://www.ncbi.nlm.nih.gov/corehtml/query/egifs/http:--www.pubmedcentral.nih.gov-corehtml-pmc-pmcgifs-pubmed-pmc.gif Simulated annealing with restrained molecular dynamics using CONGEN: energy refinement of the NMR solution structures of epidermal and type-alpha...
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[NMR paper] NMR characterization of side chain flexibility and backbone structure in the type I a
NMR characterization of side chain flexibility and backbone structure in the type I antifreeze protein at near freezing temperatures.
http://www.ncbi.nlm.nih.gov/corehtml/query/egifs/http:--pubs.acs.org-images-acspubs.jpg Related Articles NMR characterization of side chain flexibility and backbone structure in the type I antifreeze protein at near freezing temperatures.
Biochemistry. 1996 Dec 24;35(51):16698-704
Authors: Gronwald W, Chao H, Reddy DV, Davies PL, Sykes BD, Sönnichsen FD
The flexibility of the polar side chains in the...