Related ArticlesEnergy landscapes of a hairpin peptide including NMR chemical shift restraints.
Phys Chem Chem Phys. 2015 Jul 17;
Authors: Carr JM, Whittleston CS, Wade DC, Wales DJ
Abstract
Methods recently introduced to improve the efficiency of protein structure prediction simulations by adding a restraint potential to a molecular mechanics force field introduce additional input parameters that can affect the performance. Here we investigate the changes in the energy landscape as the relative weight of the two contributions, force field and restraint potential, is systematically altered, for restraint functions constructed from calculated nuclear magnetic resonance chemical shifts. Benchmarking calculations were performed on a 12-residue peptide, tryptophan zipper 1, which features both secondary structure (a ?-hairpin) and specific packing of tryptophan sidechains. Basin-hopping global optimization was performed to assess the efficiency with which lowest-energy structures are located, and the discrete path sampling approach was employed to survey the energy landscapes between unfolded and folded structures. We find that inclusion of the chemical shift restraints improves the efficiency of structure prediction because the energy landscape becomes more funnelled and the proportion of local minima classified as native increases. However, the funnelling nature of the landscape is reduced as the relative contribution of the chemical shift restraint potential is increased past an optimal value.
PMID: 26186565 [PubMed - as supplied by publisher]
[NMR paper] The Complexity of Protein Energy Landscapes Studied by Solution NMR Relaxation Dispersion Experiments.
The Complexity of Protein Energy Landscapes Studied by Solution NMR Relaxation Dispersion Experiments.
Related Articles The Complexity of Protein Energy Landscapes Studied by Solution NMR Relaxation Dispersion Experiments.
J Phys Chem B. 2015 Feb 13;
Authors: Khirich G, Loria JP
Abstract
The millisecond timescale motions in ribonuclease A (RNase A) were studied by solution NMR CPMG and off-resonance R1? relaxation dispersion experiments over a wide pH and temperature range. These experiments identify three separate protein...
[NMR paper] NMR mapping of protein conformational landscapes using coordinated behavior of chemical shifts upon ligand binding.
NMR mapping of protein conformational landscapes using coordinated behavior of chemical shifts upon ligand binding.
Related Articles NMR mapping of protein conformational landscapes using coordinated behavior of chemical shifts upon ligand binding.
Phys Chem Chem Phys. 2014 Mar 7;
Authors: Cembran A, Kim J, Gao J, Veglia G
Abstract
Proteins exist as an ensemble of conformers that are distributed on free energy landscapes resembling folding funnels. While the most stable conformers populate low energy basins, protein function is often...
nmrlearner
Journal club
0
03-10-2014 10:35 AM
[NMR paper] Mapping Protein Conformational Energy Landscapes Using NMR and Molecular Simulation.
Mapping Protein Conformational Energy Landscapes Using NMR and Molecular Simulation.
Mapping Protein Conformational Energy Landscapes Using NMR and Molecular Simulation.
Chemphyschem. 2013 May 23;
Authors: Guerry P, Mollica L, Blackledge M
Abstract
Nuclear magnetic resonance (NMR) spectroscopy provides detailed understanding of the nature and extent of protein dynamics on physiologically important timescales. We present recent advances in the combination of NMR with state-of-the-art molecular simulation that are providing unique new...
nmrlearner
Journal club
0
05-25-2013 12:05 PM
[NMR paper] Practical use of chemical shift databases for protein solid-state NMR: 2D chemical shift maps and amino-acid assignment with secondary-structure information.
Practical use of chemical shift databases for protein solid-state NMR: 2D chemical shift maps and amino-acid assignment with secondary-structure information.
Practical use of chemical shift databases for protein solid-state NMR: 2D chemical shift maps and amino-acid assignment with secondary-structure information.
J Biomol NMR. 2013 Apr 28;
Authors: Fritzsching KJ, Yang Y, Schmidt-Rohr K, Hong M
Abstract
We introduce a Python-based program that utilizes the large database of (13)C and (15)N chemical shifts in the Biological Magnetic...
nmrlearner
Journal club
0
04-30-2013 10:21 PM
[NMR paper] Characterization of the free-energy landscapes of proteins by NMR-guided metadynamics.
Characterization of the free-energy landscapes of proteins by NMR-guided metadynamics.
Related Articles Characterization of the free-energy landscapes of proteins by NMR-guided metadynamics.
Proc Natl Acad Sci U S A. 2013 Apr 9;
Authors: Granata D, Camilloni C, Vendruscolo M, Laio A
Abstract
The use of free-energy landscapes rationalizes a wide range of aspects of protein behavior by providing a clear illustration of the different states accessible to these molecules, as well as of their populations and pathways of interconversion. The...
NMR chemical shift assignments of a complex between SUMO-1 and SIM peptide derived fr
NMR chemical shift assignments of a complex between SUMO-1 and SIM peptide derived from the C-terminus of Daxx.
Related Articles NMR chemical shift assignments of a complex between SUMO-1 and SIM peptide derived from the C-terminus of Daxx.
Biomol NMR Assign. 2010 Oct 7;
Authors: Naik MT, Chang CC, Naik NM, Kung CC, Shih HM, Huang TH
Small Ubiquitin-like MOdifiers (SUMOs) are ubiquitin-like proteins known to covalently modify large number of cellular proteins. The mammalian SUMO family includes four paralogues, SUMO-1 through SUMO-4....
Energy landscapes of a hairpin peptide including NMR chemical shift restraints.
Linear Mode
