The MARTINI Force Field: Coarse Grained Model for Biomolecular Simulations
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Abstract
We present an improved and extended version of our coarse grained lipid model. The new version, coined the MARTINI force field, is parametrized in a systematic way, based on the reproduction of partitioning free energies between polar and apolar phases of a large number of chemical compounds. To reproduce the free energies of these chemical building blocks, the number of possible interaction levels of the coarse-grained sites has increased compared to those of the previous model. Application of the new model to lipid bilayers shows an improved behavior in terms of the stress profile across the bilayer and the tendency to form pores. An extension of the force field now also allows the simulation of planar (ring) compounds, including sterols. Application to a bilayer/cholesterol system at various concentrations shows the typical cholesterol condensation effect similar to that observed in all atom representations.
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The record
- Venue
- The Journal of Physical Chemistry B
- Topic
- Lipid Membrane Structure and Behavior
- Field
- Biochemistry, Genetics and Molecular Biology
- Canadian institutions
- University of Calgary
- Funders
- Canadian Institutes of Health ResearchNatural Sciences and Engineering Research Council of CanadaNederlandse Organisatie voor Wetenschappelijk OnderzoekAlberta Heritage Foundation for Medical Research
- Keywords
- Force field (fiction)BilayerChemical physicsPolarLipid bilayerCondensationMolecular dynamicsField (mathematics)Ring (chemistry)PlanarChemistryMaterials scienceBiological systemMembraneComputational chemistryPhysicsThermodynamicsComputer scienceMathematicsOrganic chemistry
- Has abstract in OpenAlex
- yes