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@ARTICLE{Schmidt:136596,
author = {Schmidt, Felix and Levin, Johannes and Kamp, Frits and
Kretzschmar, Hans and Giese, Armin and Bötzel, Kai},
title = {{S}ingle-channel electrophysiology reveals a distinct and
uniform pore complex formed by α-synuclein oligomers in
lipid membranes.},
journal = {PLOS ONE},
volume = {7},
number = {8},
issn = {1932-6203},
address = {San Francisco, California, US},
publisher = {PLOS},
reportid = {DZNE-2020-02918},
pages = {e42545},
year = {2012},
abstract = {Synucleinopathies such as Parkinson's disease, multiple
system atrophy and dementia with Lewy bodies are
characterized by deposition of aggregated α-synuclein.
Recent findings indicate that pathological oligomers rather
than fibrillar aggregates may represent the main toxic
protein species. It has been shown that α-synuclein
oligomers can increase the conductance of lipid bilayers
and, in cell-culture, lead to calcium dyshomeostasis and
cell death. In this study, employing a setup for
single-channel electrophysiology, we found that addition of
iron-induced α-synuclein oligomers resulted in quantized
and stepwise increases in bilayer conductance indicating
insertion of distinct transmembrane pores. These pores
switched between open and closed states depending on clamped
voltage revealing a single-pore conductance comparable to
that of bacterial porins. Pore conductance was dependent on
transmembrane potential and the available cation. The pores
stably inserted into the bilayer and could not be removed by
buffer exchange. Pore formation could be inhibited by
co-incubation with the aggregation inhibitor baicalein. Our
findings indicate that iron-induced α-synuclein oligomers
can form a uniform and distinct pore species with
characteristic electrophysiological properties. Pore
formation could be a critical event in the pathogenesis of
synucleinopathies and provide a novel structural target for
disease-modifying therapy.},
keywords = {Cations / Electric Conductivity / Electrophysiological
Phenomena / Humans / Lipid Bilayers: metabolism / Models,
Biological / Porosity / Protein Structure, Quaternary / Time
Factors / alpha-Synuclein: chemistry / alpha-Synuclein:
metabolism / Cations (NLM Chemicals) / Lipid Bilayers (NLM
Chemicals) / alpha-Synuclein (NLM Chemicals)},
cin = {AG Höglinger 1},
ddc = {610},
cid = {I:(DE-2719)1110002},
pnm = {344 - Clinical and Health Care Research (POF3-344)},
pid = {G:(DE-HGF)POF3-344},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:22880029},
pmc = {pmc:PMC3411845},
doi = {10.1371/journal.pone.0042545},
url = {https://pub.dzne.de/record/136596},
}