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- W3048910108 endingPage "7841" @default.
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- W3048910108 abstract "Fundamental understanding of specific interactions of human islet amyloid polypeptide (hIAPP) with cell membrane is critical for elucidating the underlying pathogenesis of type II diabetes mellitus (T2DM). Membrane cholesterol is known to regulate membrane functions and properties, but its exact role in driving hIAPP-membrane interactions still remains controversial. In this work, we computationally investigated the concentration effect of cholesterol on the adsorption, orientation, and surface interaction of hIAPP oligomers on POPC bilayers containing different amounts of cholesterol (χ = 0, 20, and 40 mol %). Collective MD simulations consistently showed that an increased cholesterol level modulated the structure and dynamics of POPC bilayer, leading to an increase of bilayer thickness, lipid packing order, and surface hydrophobicity but a decrease of lipid mobility. Cholesterol-induced bilayer changes further caused hIAPP oligomer to more preferentially bind to POPC bilayer in the presence of cholesterol via C-terminal residues, in contrast to weak or no binding of hIAPP oligomer on pure POPC bilayers. The cholesterol-enhanced hIAPP-membrane binding is mainly contributed by electrostatic interactions between C-terminal residues and lipid head groups, which may explain the rapid adsorption and aggregation of hIAPP in the presence of cholesterol in cell membranes. This computational work provides some insights into drug development and therapeutic strategies for T2DM by considering cholesterol effects." @default.
- W3048910108 created "2020-08-18" @default.
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- W3048910108 date "2020-08-10" @default.
- W3048910108 modified "2023-10-07" @default.
- W3048910108 title "Molecular Dynamics Simulations of Cholesterol Effects on the Interaction of hIAPP with Lipid Bilayer" @default.
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- W3048910108 doi "https://doi.org/10.1021/acs.jpcb.0c05742" @default.
- W3048910108 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/32790383" @default.
- W3048910108 hasPublicationYear "2020" @default.
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