CHARMM Additive All-Atom Force Field for Acyclic Polyalcohols, Acyclic Carbohydrates, and Inositol
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TLDR
In this article, the additive all-atom CHARMM force field for acyclic polyalcohols, inositol, and carbonyls was optimized targeting quantum mechanical interaction data for solute−water pairs and pure solvent thermodynamic data.Abstract:
Parametrization of the additive all-atom CHARMM force field for acyclic polyalcohols, acyclic carbohydrates, and inositol is conducted. Initial parameters were transferred from the alkanes and hexopyranose carbohydrates, with subsequent development and optimization of parameters unique to the molecules considered in this study. Using the model compounds acetone and acetaldehyde, nonbonded parameters for carbonyls were optimized targeting quantum mechanical interaction data for solute−water pairs and pure solvent thermodynamic data. Bond and angle parameters were adjusted by comparing optimized geometries to small molecule crystal survey data and by performing vibrational analyses on acetone, acetaldehyde, and glycerol. C−C−C−C, C−C−C−O, C−C−O−H, and O−C−C−O torsional parameters for polyol chains were fit to quantum mechanical dihedral potential-energy scans comprising over 1500 RIMP2/cc-pVTZ//MP2/6-31G(d) conformations using an automated Monte Carlo simulated annealing procedure. Comparison of computed co...read more
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CHARMM general force field: A force field for drug-like molecules compatible with the CHARMM all-atom additive biological force fields.
Kenno Vanommeslaeghe,Elizabeth Hatcher,Chayan Acharya,Sibsankar Kundu,Shijun Zhong,Jihyun Shim,Eva Darian,Olgun Guvench,Pedro E. M. Lopes,Igor Vorobyov,Alexander D. MacKerell +10 more
TL;DR: An extension of the CHARMM force field to drug‐like molecules is presented, making it possible to perform “all‐CHARMM” simulations on drug‐target interactions thereby extending the utility ofCHARMM force fields to medicinally relevant systems.
Journal ArticleDOI
Update of the CHARMM All-Atom Additive Force Field for Lipids: Validation on Six Lipid Types
Jeffery B. Klauda,Richard M. Venable,J. Alfredo Freites,Joseph W. O’Connor,Douglas J. Tobias,Carlos Mondragon-Ramirez,Igor Vorobyov,Alexander D. MacKerell,Richard W. Pastor +8 more
TL;DR: The presented lipid FF is developed and applied to phospholipid bilayers with both choline and ethanolamine containing head groups and with both saturated and unsaturated aliphatic chains and is anticipated to be of utility for simulations of pure lipid systems as well as heterogeneous systems including membrane proteins.
Journal ArticleDOI
CHARMM Additive All-Atom Force Field for Glycosidic Linkages between Hexopyranoses
TL;DR: The model-compound optimized force field parameters allow for the modeling of linear, branched, and cyclic hexopyranose glycosides both alone and in heterogenous systems including proteins, nucleic acids and/or lipids when combined with existing CHARMM biomolecular force fields.
Journal ArticleDOI
CHARMM additive all-atom force field for carbohydrate derivatives and its utility in polysaccharide and carbohydrate-protein modeling.
Olgun Guvench,Sairam S. Mallajosyula,E. Prabhu Raman,Elizabeth Hatcher,Kenno Vanommeslaeghe,Theresa J. Foster,Francis W. Jamison,Alexander D. MacKerell +7 more
TL;DR: Development of force-field parameters for monosaccharide derivatives and their covalent connections to proteins via O-linkages to serine or threonine sidechains and via N- linkages to asparagine sidechains are detailed.
Journal ArticleDOI
An Empirical Polarizable Force Field Based on the Classical Drude Oscillator Model: Development History and Recent Applications.
TL;DR: The classical Drude oscillator model, in which electronic degrees of freedom are modeled by charged particles attached to the nuclei of their core atoms by harmonic springs, is reviewed.
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