Oien, Derek B.Shinogle, Heather E.Moore, David S.Moskovitz, Jackob2017-05-242017-05-242009-11Oien, D. B., Shinogle, H. E., Moore, D. S., & Moskovitz, J. (2009). Clearance and Phosphorylation of Alpha-Synuclein Are Inhibited in Methionine Sulfoxide Reductase A Null Yeast Cells. Journal of Molecular Neuroscience : MN, 39(3), 323–332. http://doi.org/10.1007/s12031-009-9274-8https://hdl.handle.net/1808/24294Aggregated α-synuclein and the point mutations Ala30Pro and Ala53Thr of α-synuclein are associated with Parkinson’s disease. The physiological roles of α-synuclein and methionine oxidation of the α-synuclein protein structure and function are not fully understood. Methionine sulfoxide reductase A (MsrA) reduces methionine sulfoxide residues and functions as an antioxidant. To monitor the effect of methionine oxidation to α-synuclein on basic cellular processes, α-synucleins were expressed in msrA null mutant and wild-type yeast cells. Protein degradation was inhibited in the α-synuclein-expressing msrA null mutant cells compared to α-synuclein-expressing wild-type cells. Increased inhibition of degradation and elevated accumulations of fibrillated proteins were observed in SynA30P-expressing msrA null mutant cells. Additionally, methionine oxidation inhibited α-synuclein phosphorylation in yeast cells and in vitro by casein kinase 2. Thus, a compromised MsrA function combined with α-synuclein overexpression may promote processes leading to synucleinopathies.© Humana Press 2009Oxidative stressPosttranslation modificationNeurodegenerative diseasesParkinson's diseaseAntioxidantsProtein aggregationYeastSynucleinArticle10.1007/s12031-009-9274-8PMC3708264openAccess