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Updated: Jun 6, 2026
High-throughput Yeast Plasmid Overexpression Screen
Published on: July 27, 2011
TDP-43 toxicity in yeast
Maria Armakola1, Michael P Hart, Aaron D Gitler
1Neuroscience Graduate Group, The University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA.
Abstract:
The budding yeast Saccharomyces cerevisiae is an emerging tool for investigating the molecular pathways that underpin several human neurodegenerative disorders associated with protein misfolding. Amyotrophic lateral sclerosis (ALS) is a devastating adult onset neurodegenerative disease primarily affecting motor neurons. The protein TDP-43 has recently been demonstrated to play an important role in the disease, however, the mechanisms by which TDP-43 contributes to pathogenesis are unclear. To explore the mechanistic details that result in aberrant accumulation of TDP-43 and to discover potential strategies for therapeutic intervention, we employed a yeast TDP-43 proteinopathy model system. These studies allowed us to determine the regions of TDP-43 required for aggregation and toxicity and to define the effects of ALS-linked mutant forms of TDP-43. We have also been able to harness the power of yeast genetics to identify potent modifiers of TDP-43 toxicity using high-throughput yeast genetic screens. Here, we describe the methods and approaches that we have used in order to gain insight into TDP-43 biology and its role in disease. These approaches are readily adaptable to other neurodegenerative disease proteins.
Insights
Budding yeast models reveal how TDP-43 protein aggregation causes neurodegeneration in Amyotrophic Lateral Sclerosis (ALS). This research identifies key toxic regions and potential therapeutic targets for ALS and other protein misfolding diseases.
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- Amyotrophic Lateral Sclerosis (ALS) is a neurodegenerative disease linked to protein misfolding.
- The exact mechanisms of TDP-43's role in ALS pathogenesis remain unclear.
- Budding yeast (Saccharomyces cerevisiae) offers a powerful model for studying proteinopathies.
Purpose of the Study:
- To investigate the molecular pathways of TDP-43 accumulation and toxicity in ALS.
- To identify regions of TDP-43 critical for aggregation and disease.
- To discover potential therapeutic strategies for ALS.
Main Methods:
- Utilized a yeast TDP-43 proteinopathy model system.
- Employed high-throughput yeast genetic screens to identify toxicity modifiers.
- Defined the effects of ALS-linked TDP-43 mutations.
Main Results:
- Identified specific regions of TDP-43 essential for aggregation and toxicity.
- Characterized the impact of ALS-associated TDP-43 mutations.
- Discovered genetic modifiers that influence TDP-43 toxicity.
Conclusions:
- Yeast models provide valuable insights into TDP-43 biology and ALS pathogenesis.
- This approach can identify therapeutic targets for protein misfolding disorders.
- The methods are adaptable for studying other neurodegenerative disease proteins.
