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ESCRT-III Inhibition by Alpha-Synuclein in Neurodegeneration

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wiki page Created: 2026-04-02T07:19:49 By: crosslink-migration Quality: 50% ✓ SciDEX ID: wiki-mechanisms-escrit-iii-inhibition-al
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ESCRT-III Inhibition by Alpha-Synuclein in Neurodegeneration

The Endosomal Sorting Complex Required for Transport-III (ESCRT-III) machinery is essential for multivesicular body (MVB) formation, lysosomal trafficking, and autophagosomal maturation. In Parkinson's disease (PD) and related synucleinopathies, alpha-synuclein ([α-syn](/proteins/alpha-synuclein)) aggregates directly interfere with ESCRT-III function through multiple mechanisms, creating a vicious cycle that accelerates neurodegeneration. This mechanism page details how α-syn pathology disrupts ESCRT-III, impairs cellular waste clearance, and contributes to the propagation of pathological proteins.

Background: ESCRT-III Machinery

The ESCRT-III complex comprises charged multivesicular body proteins (CHMPs) that execute the final stages of membrane budding and scission:

flowchart TD A["Early Endosome"] --> B["ESCRT-0 HRS-STAM"] B --> C["ESCRT-I TSG101-VPS37"] C --> D["ESCRT-II VPS36-VPS22"] D --> E["ESCRT-III Assembly"] E --> F["CHMP2A/CHMP2B recruitment"] F --> G["CHMP4A/CHMP4B polymerization"] G --> H["Membrane constriction"] H --> I["VPS4 ATPase activity"] I --> J["Vesicle release and recycling"] style A fill:#0a1929,stroke:#1565c0,color:#e0e0e0 style J fill:#0a1f0a,stroke:#2e7d32,color:#e0e0e0 subgraph ESCRT-III F G H I end

Core ESCRT-III Components


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