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• W2078596883 abstract "We report the development of internal coordinate mechanics force field (ICMFF), new force field parameterized using a combination of experimental data for crystals of small molecules and quantum mechanics calculations. The main features of ICMFF include: (a) parameterization for the dielectric constant relevant to the condensed state (ε = 2) instead of vacuum, (b) an improved description of hydrogen-bond interactions using duplicate sets of van der Waals parameters for heavy atom-hydrogen interactions, and (c) improved backbone covalent geometry and energetics achieved using novel backbone torsional potentials and inclusion of the bond angles at the C(α) atoms into the internal variable set. The performance of ICMFF was evaluated through loop modeling simulations for 4-13 residue loops. ICMFF was combined with a solvent-accessible surface area solvation model optimized using a large set of loop decoys. Conformational sampling was carried out using the biased probability Monte Carlo method. Average/median backbone root-mean-square deviations of the lowest energy conformations from the native structures were 0.25/0.21 Å for four residues loops, 0.84/0.46 Å for eight residue loops, and 1.16/0.73 Å for 12 residue loops. To our knowledge, these results are significantly better than or comparable with those reported to date for any loop modeling method that does not take crystal packing into account. Moreover, the accuracy of our method is on par with the best previously reported results obtained considering the crystal environment. We attribute this success to the high accuracy of the new ICM force field achieved by meticulous parameterization, to the optimized solvent model, and the efficiency of the search method." @default.
• W2078596883 created "2016-06-24" @default.
• W2078596883 creator A5004927601 @default.
• W2078596883 creator A5064101943 @default.
• W2078596883 creator A5070322806 @default.
• W2078596883 date "2010-11-10" @default.
• W2078596883 modified "2023-10-18" @default.
• W2078596883 title "Development of a new physics-based internal coordinate mechanics force field and its application to protein loop modeling" @default.
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• W2078596883 doi "https://doi.org/10.1002/prot.22896" @default.
• W2078596883 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3057902" @default.
• W2078596883 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/21069716" @default.
• W2078596883 hasPublicationYear "2010" @default.
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