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Related Experiment Video

Updated: Jul 9, 2026

Utilizing Time-Resolved Protein-Induced Fluorescence Enhancement to Identify Stable Local Conformations One α-Synuclein Monomer at a Time

Utilizing Time-Resolved Protein-Induced Fluorescence Enhancement to Identify Stable Local Conformations One α-Synuclein Monomer at a Time

Published on: May 30, 2021

Alpha-synuclein selectively binds to anionic phospholipids embedded in liquid-disordered domains.

Martin Stöckl¹, Patricia Fischer, Erich Wanker

¹Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, Institut für Biologie/Biophysik, Invalidenstr. 43, D-10115 Berlin, Germany.

Journal of Molecular Biology

|December 18, 2007

Summary

Alpha-synuclein binding to membranes is crucial for Parkinson's disease (PD). This study shows that lipid environment and packing influence binding, with PD-linked variants altering this interaction.

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Interactions with and Membrane Permeabilization of Brain Mitochondria by Amyloid Fibrils

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Interactions with and Membrane Permeabilization of Brain Mitochondria by Amyloid Fibrils

Interactions with and Membrane Permeabilization of Brain Mitochondria by Amyloid Fibrils

Published on: September 28, 2019

Area of Science:

Biochemistry
Neuroscience
Cell Biology

Background:

Alpha-synuclein's membrane binding is vital for normal function and Parkinson's disease (PD) pathogenesis.
Understanding these interactions is key to elucidating PD mechanisms.

Purpose of the Study:

To investigate how alpha-synuclein variants interact with different membrane compositions.
To determine the role of lipid properties in alpha-synuclein membrane association.

Main Methods:

Utilized fluorescence-labeled alpha-synuclein variants.
Employed confocal microscopy to observe binding to giant unilamellar vesicles (GUVs).
Analyzed interactions with anionic phospholipids in varied lipid environments.

Main Results:

Alpha-synuclein exhibits high affinity for anionic phospholipids in liquid-disordered lipid environments.
Lipid packing and hydrophobic interactions significantly influence alpha-synuclein membrane association, beyond electrostatics.
The Parkinson's-associated variant A30P showed reduced binding, while E46K displayed enhanced binding to anionic phospholipids.

Conclusions:

Membrane lipid characteristics critically modulate alpha-synuclein binding.
Inherited Parkinson's disease mutations (e.g., A30P, E46K) alter the natural membrane association of alpha-synuclein.
These findings provide insights into the molecular mechanisms underlying familial Parkinson's disease.