Journal
JOURNAL OF CHEMICAL THEORY AND COMPUTATION
Volume 12, Issue 12, Pages 5960-5967Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jctc.6b00801
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Funding
- Stanford Center for Molecular Analysis and Design (CMAD)
- NIH [R01 GM062868]
- [NSF-MCB-0954714]
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We present a united-atom model (gb-fb15) for the molecular dynamics simulation of hydrated liquid-crystalline dipalmitoylphosphatidylcholine (DPPC) phospholipid bilayers. This model was constructed through the parameter-space minimization of a regularized least-squares objective function via the ForceBalance method. The objective function was computed using a training set of experimental bilayer area per lipid and deuterium order parameter. This model was validated by comparison to experimental volume per lipid, X-ray scattering form factor, thermal area expansivity, area compressibility modulus, and lipid lateral diffusion coefficient. These comparisons demonstrate that gb-fb15 is robust to temperature variation and an improvement over the original model for both the training and validation properties.
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