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image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Journal of Chemical ...arrow_drop_down
image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
Journal of Chemical Information and Modeling
Article . 2020 . Peer-reviewed
License: STM Policy #29
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Three Popular Force Fields Predict Consensus Mechanism of Amyloid β Peptide Binding to the Dimyristoylgylcerophosphocholine Bilayer

Authors: Christopher Lockhart; Amy K. Smith; Dmitri K. Klimov;

Three Popular Force Fields Predict Consensus Mechanism of Amyloid β Peptide Binding to the Dimyristoylgylcerophosphocholine Bilayer

Abstract

Using all-atom explicit water replica-exchange molecular dynamics simulations, we examined the impact of three popular force fields (FF) on the equilibrium binding of Aβ10-40 peptide to the dimyristoylgylcerophosphocholine (DMPC) bilayer. The comparison included CHARMM22 protein FF with CHARMM36 lipid FF (C22), CHARMM36m protein FF with CHARMM36 lipid FF (C36), and Amber14SB protein FF with Lipid14 lipid FF (A14). Analysis of Aβ10-40 binding to the DMPC bilayer in three FFs revealed a consensus binding mechanism. Its main features include (i) a stable helical structure in the bound peptide, (ii) insertion of the C-terminus and, in part, the central hydrophobic cluster into the bilayer hydrophobic core, (iii) considerable thinning of the DMPC bilayer beneath the bound peptide coupled with significant drop in bilayer density, and (iv) a strong disordering in the DMPC fatty acid tails. Although the three FFs diverge on many details concerning Aβ and bilayer conformational ensembles, these discrepancies do not offset the features of the consensus binding mechanism. We compared our findings with other FF evaluations and proposed that an agreement between C22, C36, and A14 is a consequence of a strong ordering effect created by polar-apolar interface in the lipid bilayer. By comparing the consensus Aβ binding mechanism with experimental data, we surmise that the three tested FFs largely correctly capture the interactions of Aβ peptides with the DMPC lipid bilayer.

Related Organizations
Keywords

Amyloid beta-Peptides, Consensus, Lipid Bilayers, Molecular Dynamics Simulation, Dimyristoylphosphatidylcholine

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    Top 10%
    influence
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
12
Top 10%
Average
Top 10%
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