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Updated: Aug 18, 2025
Millisecond Hydrogen/Deuterium-Exchange Mass Spectrometry for the Study of Alpha-Synuclein Structural Dynamics Under Physiological Conditions
Published on: June 23, 2022
Modulation of α-synuclein phase separation by biomolecules
Leandro Cruz Rodríguez1, Nahuel N Foressi1, M Soledad Celej1
1Departamento de Química Biológica Ranwel Caputto, Centro de Investigaciones en Química Biológica de Córdoba (CIQUIBIC, CONICET), Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Haya de la Torre y Medina Allende, Ciudad Universitaria, X5000HUA Córdoba, Argentina.
Aberrant liquid-liquid phase separation (LLPS) links to neurodegenerative diseases. This study shows alpha-synuclein and Tau proteins can form mixed droplets, potentially driving Parkinson
Area of Science:
- Biochemistry
- Neuroscience
- Molecular Biology
Background:
- Liquid-liquid phase separation (LLPS) is crucial for cellular functions.
- Aberrant LLPS is implicated in neurodegenerative diseases like Parkinson's (PD) and Alzheimer's (AD).
- Proteins forming pathological aggregates often undergo LLPS.
Purpose of the Study:
- To investigate the phase separation behavior of alpha-synuclein (AS).
- To examine AS interaction with ATP, polyamines, and Tau protein.
- To explore the role of mixed protein condensates in PD and AD pathogenesis.
Main Methods:
- Evaluated homotypic and heterotypic phase behavior of alpha-synuclein.
- Studied interactions with ATP, polyamines, and Tau protein.
- Characterized droplet formation and phase properties.
Main Results:
- Alpha-synuclein (AS) shows low propensity for homotypic droplet formation.
- AS phase separation is modulated by interacting biomolecules, forming liquid-like or solid-like phases.
- Synergistic droplet formation observed between AS and Tau.
Conclusions:
- Interactions with specific biomolecules influence AS phase separation.
- Co-phase separation of AS and Tau supports their role in overlapping pathologies.
- Mixed AS/Tau condensates may contribute to the biogenesis of neurodegenerative diseases.
