Journal
MOLECULAR SIMULATION
Volume 32, Issue 3-4, Pages 211-218Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/08927020600612221
Keywords
multiscale; coarse-grain; force matching; fluctuation matching; biological membrane; lipid bilayer
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Two new approaches are presented for obtaining coarse-grained (CG) force fields from atomistic molecular dynamics (MD) trajectories. The first approach is the force-matching (FM) method whereby the force data obtained from an explicit atomistic MD simulation are utilized to determine the CG force fields. The performance of the FM method is demonstrated by applying it to derive a CG model for the dimyristoylphosphatidylcholine (DMPQ lipid bilayer. The second approach is the fluctuation-matching method whereby the fluctuations of specific internal coordinates are extracted from atomistic MD simulations to derive the CG force field. The fluctuation matching method is then applied to analyze the mechanical behavior of actin filaments. Both methods propagate the information obtained at a fine-grained atomistic scale to a CG scale, and hence are termed as multiscale coarse-graining approaches. Such multiscale approaches provide a new route to model complex biomolecular systems.
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