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Sporadic SNCA mutations A18T and A29S exhibit variable effects on protein aggregation, cell viability and oxidative
Neha Joshi1, Tanveera Rounaque Sarhadi1, Atchaya Raveendran1
1Organelle Biology and Cellular Ageing Lab, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India.
Molecular Biology Reports
|May 8, 2023
Summary
Parkinson's disease involves alpha-synuclein aggregation. This study shows that different alpha-synuclein mutations, like A18T and A29S, cause varied aggregation and toxicity, impacting Parkinson's disease pathology.
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- Alpha-synuclein aggregation is a key characteristic of Parkinson's disease.
- Both familial and sporadic Parkinson's disease forms display this aggregation.
- Numerous mutations linked to Parkinson's disease have been identified.
Purpose of the Study:
- To investigate the effects of less-studied alpha-synuclein mutations (A18T and A29S) in a yeast model.
- To characterize the cellular behavior and toxicity of these variants.
Main Methods:
- Site-directed mutagenesis to create GFP-tagged alpha-synuclein variants.
- Fluorescence microscopy, flow cytometry, and western blotting.
- Cell viability and oxidative stress assays.
Main Results:
- Variable expression, distribution, and toxicity were observed across alpha-synuclein variants (A18T, A29S, A53T, and wild-type).
- The double mutant A18T/A53T exhibited the most significant aggregation phenotype.
- The A18T/A53T variant also showed reduced cell viability, indicating increased toxicity.
Conclusions:
- Alpha-synuclein variants display diverse localization, aggregation patterns, and toxicity levels.
- Thorough analysis of each disease-associated mutation is crucial due to potentially variable cellular effects.
