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@PHDTHESIS{Samantray:836336,
author = {Samantray, Suman},
othercontributors = {Lüchow, Arne and Strodel, Birgit},
title = {{E}ssays on the interplay between glycosaminoglycans and
amyloid-β peptides},
school = {RWTH Aachen University},
type = {Dissertation},
address = {Aachen},
publisher = {RWTH Aachen University},
reportid = {RWTH-2021-11244},
pages = {1 Online-Ressource : Illustrationen, Diagramme},
year = {2021},
note = {Veröffentlicht auf dem Publikationsserver der RWTH Aachen
University 2022; Dissertation, RWTH Aachen University, 2021},
abstract = {Intrinsically disordered proteins (IDPs), which represent
$~40\%$ of the human proteome, play crucial roles in a
variety of biological pathways and biomolecular assemblies.
Monomeric IDPs such as amyloid-β (Aβ), can aggregate into
insoluble, relatively inert, rigid structures called
fibrils, but also much more toxic, soluble struc- tures of
intermediate size and varying shapes, which are called
oligomers. The toxic aggregates of Aβ peptide are
implicated in the pathogenesis of Alzheimer’s disease
(AD). In this thesis, we use in-silico approaches to model
Aβ under different physiological and pathological
conditions to unravel their effects on the structures and
kinetics of the amyloid oligomers. We first highlight the
ramifications of molecular mechanics parameters on the
structural heterogeneity of Aβ and the aggregation process
of various Aβ fragments. Next, we demonstrate how Aβ
fragments aggregate in the presence of glycosaminoglycans.
To this end, the conformational dynamics of different
glycosaminoglycans was first elucidated to understand their
behavior in the absence Aβ fragments. The conclusions from
these investigations enabled us to identify force fields
which predict Aβ structures and dynamics in agreement with
experimental observations. From transition networks applied
to the aggregation data we deduced the structural
transitions during the early and intermediate stages of
oligomer formation. Furthermore, we elucidated the
intermolecular interactions between Aβ and
glycosaminoglycans that transpire towards enhancing,
stabilizing, or inhibition of Aβ aggregation behavior.},
cin = {153420 / 150000 / 080003},
ddc = {540},
cid = {$I:(DE-82)153420_20140620$ / $I:(DE-82)150000_20140620$ /
$I:(DE-82)080003_20140620$},
typ = {PUB:(DE-HGF)11},
doi = {10.18154/RWTH-2021-11244},
url = {https://publications.rwth-aachen.de/record/836336},
}