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@ARTICLE{Ilie:858896,
author = {Ilie, Ioana M. and Nayar, Divya and den Otter, Wouter K.
and van der Vegt, Nico F. A. and Briels, Willem},
title = {{I}ntrinsic {C}onformational {P}references and
{I}nteractions in α-{S}ynuclein {F}ibrils: {I}nsights from
{M}olecular {D}ynamics {S}imulations},
journal = {Journal of chemical theory and computation},
volume = {14},
number = {6},
issn = {1549-9626},
address = {Washington, DC},
reportid = {FZJ-2018-07732},
pages = {3298 - 3310},
year = {2018},
abstract = {Amyloid formation by the intrinsically disordered
α-synuclein protein is the hallmark of Parkinson’s
disease. We present atomistic Molecular Dynamics simulations
of the core of α-synuclein using enhanced sampling
techniques to describe the conformational and binding free
energy landscapes of fragments implicated in fibril
stabilization. The theoretical framework is derived to
combine the free energy profiles of the fragments into the
reaction free energy of a protein binding to a fibril. Our
study shows that individual fragments in solution have a
propensity toward attaining non-β conformations, indicating
that in a fibril β-strands are stabilized by interactions
with other strands. We show that most dimers of
hydrogen-bonded fragments are unstable in solution, while
hydrogen bonding stabilizes the collective binding of five
fragments to the end of a fibril. Hydrophobic effects make
further contributions to the stability of fibrils. This
study is the first of its kind where structural and binding
preferences of the five major fragments of the hydrophobic
core of α-synuclein have been investigated. This approach
improves sampling of intrinsically disordered proteins,
provides information on the binding mechanism between the
core sequences of α-synuclein, and enables the
parametrization of coarse grained models.},
cin = {ICS-3},
ddc = {610},
cid = {I:(DE-Juel1)ICS-3-20110106},
pnm = {551 - Functional Macromolecules and Complexes (POF3-551)},
pid = {G:(DE-HGF)POF3-551},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:29715424},
UT = {WOS:000435416200043},
doi = {10.1021/acs.jctc.8b00183},
url = {https://juser.fz-juelich.de/record/858896},
}