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Phosphorylation Modulates Clearance of Alpha-Synuclein Inclusions in a Yeast Model of Parkinson's Disease
Protein aggregation is a common hallmark in neurodegenerative disorders, but is also associated with phenotypic plasticity in a variety of organisms, including yeasts. Alpha-synuclein (aSyn) forms aggregates that are typical of synucleinopathies, and is phosphorylated at S129, but the significance of phosphorylation in the biology and pathophysiology of the protein is still controversial. Exploring the power of budding yeast, we found phosphorylation reduced aSyn toxicity and inclusion formation. While inclusions formed by WT aSyn were homogeneous, those formed by S129A aSyn were larger and heterogeneous. Interestingly, clearance of aSyn inclusions was reduced in cells expressing S129A aSyn, correlating with deficient autophagy activation. The finding that phosphorylation alters the ability of cells to clear aSyn inclusions provides novel insight into the role phosphorylation may have in synucleinopathies, and suggests posttranslational modifications might constitute switches cells use to control the aggregation and clearance of key proteins, opening novel avenues for the development of therapeutic strategies for these devastating disorders.
Vyšlo v časopise: Phosphorylation Modulates Clearance of Alpha-Synuclein Inclusions in a Yeast Model of Parkinson's Disease. PLoS Genet 10(5): e32767. doi:10.1371/journal.pgen.1004302
Kategorie: Research Article
prolekare.web.journal.doi_sk: https://doi.org/10.1371/journal.pgen.1004302Souhrn
Protein aggregation is a common hallmark in neurodegenerative disorders, but is also associated with phenotypic plasticity in a variety of organisms, including yeasts. Alpha-synuclein (aSyn) forms aggregates that are typical of synucleinopathies, and is phosphorylated at S129, but the significance of phosphorylation in the biology and pathophysiology of the protein is still controversial. Exploring the power of budding yeast, we found phosphorylation reduced aSyn toxicity and inclusion formation. While inclusions formed by WT aSyn were homogeneous, those formed by S129A aSyn were larger and heterogeneous. Interestingly, clearance of aSyn inclusions was reduced in cells expressing S129A aSyn, correlating with deficient autophagy activation. The finding that phosphorylation alters the ability of cells to clear aSyn inclusions provides novel insight into the role phosphorylation may have in synucleinopathies, and suggests posttranslational modifications might constitute switches cells use to control the aggregation and clearance of key proteins, opening novel avenues for the development of therapeutic strategies for these devastating disorders.
Zdroje
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Štítky
Genetika Reprodukčná medicína
Článek Ribosomal Protein Mutations Induce Autophagy through S6 Kinase Inhibition of the Insulin PathwayČlánek Recent Mitochondrial DNA Mutations Increase the Risk of Developing Common Late-Onset Human DiseasesČlánek G×G×E for Lifespan in : Mitochondrial, Nuclear, and Dietary Interactions that Modify LongevityČlánek PINK1-Parkin Pathway Activity Is Regulated by Degradation of PINK1 in the Mitochondrial MatrixČlánek Rapid Evolution of PARP Genes Suggests a Broad Role for ADP-Ribosylation in Host-Virus ConflictsČlánek The Impact of Population Demography and Selection on the Genetic Architecture of Complex TraitsČlánek Lifespan Extension by Methionine Restriction Requires Autophagy-Dependent Vacuolar AcidificationČlánek The Case for Junk DNA
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