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Semisynthetic, site-specific ubiquitin modification of ?-synuclein reveals differential effects on aggregation.


ABSTRACT: The process of neurodegeneration in Parkinson's Disease is intimately associated with the aggregation of the protein ?-synuclein into toxic oligomers and fibrils. Interestingly, many of these protein aggregates are found to be post-translationally modified by ubiquitin at several different lysine residues. However, the inability to generate homogeneously ubiquitin modified ?-synuclein at each site has prevented the understanding of the specific biochemical consequences. We have used protein semisynthesis to generate nine site-specifically ubiquitin modified ?-synuclein derivatives and have demonstrated that different ubiquitination sites have differential effects on ?-synuclein aggregation.

SUBMITTER: Meier F 

PROVIDER: S-EPMC3315850 | biostudies-literature | 2012 Mar

REPOSITORIES: biostudies-literature

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Semisynthetic, site-specific ubiquitin modification of α-synuclein reveals differential effects on aggregation.

Meier Franziska F   Abeywardana Tharindumala T   Dhall Abhinav A   Marotta Nicholas P NP   Varkey Jobin J   Langen Ralf R   Chatterjee Champak C   Pratt Matthew R MR  

Journal of the American Chemical Society 20120314 12


The process of neurodegeneration in Parkinson's Disease is intimately associated with the aggregation of the protein α-synuclein into toxic oligomers and fibrils. Interestingly, many of these protein aggregates are found to be post-translationally modified by ubiquitin at several different lysine residues. However, the inability to generate homogeneously ubiquitin modified α-synuclein at each site has prevented the understanding of the specific biochemical consequences. We have used protein semi  ...[more]

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