Chapter title |
Proteostasis
|
---|---|
Chapter number | 21 |
Book title |
Proteostasis
|
Published in |
Methods in molecular biology, January 2016
|
DOI | 10.1007/978-1-4939-3756-1_21 |
Pubmed ID | |
Book ISBNs |
978-1-4939-3754-7, 978-1-4939-3756-1
|
Authors |
Tenreiro, Sandra, Macedo, Diana, Marijanovic, Zrinka, Outeiro, Tiago Fleming, Sandra Tenreiro, Diana Macedo, Zrinka Marijanovic, Tiago Fleming Outeiro |
Editors |
Rune Matthiesen |
Abstract |
Protein misfolding, aggregation, and accumulation are a common hallmark in various neurodegenerative diseases. Invariably, the process of protein aggregation is associated with both a loss of the normal biological function of the protein and a gain of toxic function that ultimately leads to cell death. The precise origin of protein cytotoxicity is presently unclear but the predominant theory posits that smaller oligomeric species are more toxic than larger aggregated forms. While there is still no consensus on this subject, this is a central question that needs to be addressed in order to enable the design of novel and more effective therapeutic strategies. Accordingly, the development and utilization of approaches that allow the biochemical characterization of the formed oligomeric species in a given cellular or animal model will enable the correlation with cytotoxicity and other parameters of interest.Here, we provide a detailed description of a low-cost protocol for the analysis of protein oligomeric species from both yeast and mammalian cell lines models, based on their separation according to sedimentation velocity using high-speed centrifugation in sucrose gradients. This approach is an adaptation of existing protocols that enabled us to overcome existing technical issues and obtain reliable results that are instrumental for the characterization of the types of protein aggregates formed by different proteins of interest in the context of neurodegenerative disorders. |
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