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Millisecond Hydrogen/Deuterium-Exchange Mass Spectrometry for the Study of Alpha-Synuclein Structural Dynamics Under Physiological Conditions
Published on: June 23, 2022
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α-Synuclein phase separation and amyloid aggregation are modulated by C-terminal truncations
Shuai Huang1, Xiaoli Mo2, Jieyi Wang1
1Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, China.
FEBS Letters
|April 29, 2022
Summary
The C-terminal region of alpha-synuclein (α-Syn) regulates its phase separation, crucial for Parkinson
Area of Science:
- Neuroscience
- Biochemistry
- Molecular Biology
Background:
- Alpha-synuclein (α-Syn) aggregation is central to Parkinson's disease (PD) pathology.
- Liquid-liquid phase separation (LLPS) of α-Syn drives amyloid formation, but its regulation is unclear.
Purpose of the Study:
- To investigate the role of the C-terminal region in α-Syn LLPS.
- To understand how truncated α-Syn influences wild-type (WT) α-Syn aggregation in PD.
Main Methods:
- Investigated α-Syn phase separation using biophysical techniques.
- Examined the interplay between WT and truncated α-Syn in vitro.
- Analyzed the impact of C-terminal modulation on α-Syn aggregation.
Main Results:
- The C-terminal region modulates α-Syn phase separation via electrostatic interactions.
- Truncated α-Syn significantly enhances WT α-Syn phase separation and subsequent amyloid aggregation.
- WT and truncated α-Syn species co-localize within phase-separated condensates.
Conclusions:
- The C-terminal domain is a key regulator of α-Syn LLPS.
- Truncated α-Syn accelerates PD pathology by promoting WT α-Syn aggregation through altered phase separation.
- Findings offer insights into PD mechanisms and potential therapeutic targets.
