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@ARTICLE{sterlund:858908,
author = {Österlund, Nicklas and Kulkarni, Yashraj S. and Misiaszek,
Agata D. and Wallin, Cecilia and Krüger, Dennis M. and
Liao, Qinghua and Mashayekhy Rad, Farshid and Jarvet, Jüri
and Strodel, Birgit and Wärmländer, Sebastian K. T. S. and
Ilag, Leopold L. and Kamerlin, Shina C. L. and Gräslund,
Astrid},
title = {{A}myloid-β {P}eptide {I}nteractions with {A}mphiphilic
{S}urfactants: {E}lectrostatic and {H}ydrophobic {E}ffects},
journal = {ACS chemical neuroscience},
volume = {9},
number = {7},
issn = {1948-7193},
address = {Washington, DC},
publisher = {ACS Publ.},
reportid = {FZJ-2018-07744},
pages = {1680 - 1692},
year = {2018},
abstract = {The amphiphilic nature of the amyloid-β (Aβ) peptide
associated with Alzheimer's disease facilitates various
interactions with biomolecules such as lipids and proteins,
with effects on both structure and toxicity of the peptide.
Here, we investigate these peptide-amphiphile interactions
by experimental and computational studies of Aβ(1-40) in
the presence of surfactants with varying physicochemical
properties. Our findings indicate that electrostatic
peptide-surfactant interactions are required for
coclustering and structure induction in the peptide and that
the strength of the interaction depends on the surfactant
net charge. Both aggregation-prone peptide-rich coclusters
and stable surfactant-rich coclusters can form. Only
Aβ(1-40) monomers, but not oligomers, are inserted into
surfactant micelles in this surfactant-rich state.
Surfactant headgroup charge is suggested to be important as
electrostatic peptide-surfactant interactions on the
micellar surface seems to be an initiating step toward
insertion. Thus, no peptide insertion or change in peptide
secondary structure is observed using a nonionic surfactant.
The hydrophobic peptide-surfactant interactions instead
stabilize the Aβ monomer, possibly by preventing
self-interaction between the peptide core and C-terminus,
thereby effectively inhibiting the peptide aggregation
process. These findings give increased understanding
regarding the molecular driving forces for Aβ aggregation
and the peptide interaction with amphiphilic biomolecules.},
cin = {ICS-6},
ddc = {540},
cid = {I:(DE-Juel1)ICS-6-20110106},
pnm = {551 - Functional Macromolecules and Complexes (POF3-551)},
pid = {G:(DE-HGF)POF3-551},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:29683649},
UT = {WOS:000439531400017},
doi = {10.1021/acschemneuro.8b00065},
url = {https://juser.fz-juelich.de/record/858908},
}