Hydrophobic interactions in the formation of secondary structures in small peptides

C.L. Dias, M.E.J. Karttunen, H.S. Chan

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    88 Downloads (Pure)

    Abstract

    Effects of the attractive and repulsive parts of hydrophobic interactions on a helices and ß sheets in small peptides are investigated using a simple atomic potential. Typically, a physical spatial range of attraction tends to favor ß sheets, but a helices would be favored if the attractive range were more extended. We also found that desolvation barriers favor ß sheets in collapsed conformations of polyalanine, polyvaline, polyleucine, and three fragments of amyloid peptides tested in this study. Our results provide insight into the multifaceted role of hydrophobicity in secondary structure formation, including the a to ß transitions in certain amyloid peptides.
    Original languageEnglish
    Article number041931
    Pages (from-to)1-9
    JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
    Volume84
    Issue number4
    DOIs
    Publication statusPublished - 25 Oct 2011

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