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A split biotin ligase approach reveals proteins associated with oligomeric alpha-synuclein during aggregation
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A split biotin ligase approach reveals proteins associated with oligomeric alpha-synuclein during aggregation
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Journal Article
A split biotin ligase approach reveals proteins associated with oligomeric alpha-synuclein during aggregation
2026
Overview
Lewy pathology can form over decades in patients with Lewy body diseases, but the causal cellular mechanisms associated with this process remain unclear. This project aims to discover proteins that associate with monomeric and/or oligomeric alpha-synuclein during early stages of the aggregation process. To mimic aggregation processes, cells expressing a synuclein-biotin ligase fusion protein were treated with human recombinant pre-formed fibrils and subjected to BioSITe and mass spectrometry. Using a novel split biotin ligase fused to alpha-synuclein facilitated the identification of proteins specifically associated with multimeric alpha-synuclein. A total of 581 proteins were differentiated into potential interactors of monomeric versus multimeric alpha-synuclein in physiological versus aggregated conditions. The data reveal potentially relevant phosphorylation mechanisms, connections to insulin processing, and a potential interaction with ALS/FTD-associated FUS. Interestingly, we propose that loss of specific interactions may contribute to pathology in patients with sporadic onset of Lewy body diseases. Future studies will validate both true interaction of highlighted proteins with alpha-synuclein, and the impact of such proteins on alpha-synuclein aggregation.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ 631/1647
/ 631/378
/ 631/45
/ 631/57
/ alpha-Synuclein - metabolism
/ Biotin
/ Carbon-Nitrogen Ligases - genetics
/ Carbon-Nitrogen Ligases - metabolism
/ Disease
/ Enzymes
/ Fibrils
/ FUS gene
/ Humanities and Social Sciences
/ Humans
/ Labeling
/ Protein Aggregation, Pathological - metabolism
/ Proteins
/ Recombinant Fusion Proteins - metabolism
/ Science
