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• W4313236875 endingPage "269" @default.
• W4313236875 startingPage "259" @default.
• W4313236875 abstract "The free-energy profile of a compound is an essential measurement in evaluating the membrane permeation process by means of theoretical methods. Computationally, molecular dynamics (MD) simulation allows the free-energy profile calculation. However, MD simulations frequently fail to sample membrane permeation because they are rare events induced in longer timescales than the accessible timescale of MD, leading to an insufficient conformational search to calculate an incorrect free-energy profile. To achieve a sufficient conformational search, several enhanced sampling methods have been developed and elucidated the membrane permeation process. In addition to these enhanced sampling methods, we proposed a simple yet powerful free-energy calculation of a compound for the membrane permeation process based on originally rare-event sampling methods developed by us. Our methods have a weak dependency on external biases and their optimizations to promote the membrane permeation process. Based on distributed computing, our methods only require the selection of initial structures and their conformational resampling, whereas the enhanced sampling methods may be required to adjust external biases. Furthermore, our methods efficiently search membrane permeation processes with simple scripts without modifying any MD program. As demonstrations, we calculated the free-energy profiles of seven linear compounds for their membrane permeation based on a hybrid conformational search using two rare-event sampling methods, that is, (1) parallel cascade selection MD (PaCS-MD) and (2) outlier flooding method (OFLOOD), combined with a Markov state model (MSM) construction. In the first step, PaCS-MD generated initial membrane permeation paths of a compound. In the second step, OFLOOD expanded the unsearched conformational area around the initial paths, allowing for a broad conformational search. Finally, the trajectories were employed to construct reliable MSMs, enabling correct free-energy profile calculations. Furthermore, we estimated the membrane permeability coefficients of all compounds by constructing the reliable MSMs for their membrane permeation. In conclusion, the calculated coefficients were qualitatively correlated with the experimental measurements (correlation coefficient (R2) = 0.8689), indicating that the hybrid conformational search successfully calculated the free-energy profiles and membrane permeability coefficients of the seven compounds." @default.
• W4313236875 created "2023-01-06" @default.
• W4313236875 creator A5034873036 @default.
• W4313236875 creator A5048994262 @default.
• W4313236875 creator A5054539747 @default.
• W4313236875 date "2022-12-27" @default.
• W4313236875 modified "2023-09-24" @default.
• W4313236875 title "Free-Energy Profiles for Membrane Permeation of Compounds Calculated Using Rare-Event Sampling Methods" @default.
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• W4313236875 doi "https://doi.org/10.1021/acs.jcim.2c01097" @default.
• W4313236875 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36574612" @default.
• W4313236875 hasPublicationYear "2022" @default.
• W4313236875 type Work @default.
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