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• W1983060147 abstract "Mutations in several genes, including PINK1 and Parkin, are known to cause autosomal recessive cases of Parkinson disease in humans. These genes operate in the same pathway and play a crucial role in mitochondrial dynamics and maintenance. PINK1 is required to recruit Parkin to mitochondria and initiate mitophagy upon mitochondrial depolarization. In this study, we show that PINK1-dependent Parkin mitochondrial recruitment in response to global mitochondrial damage by carbonyl cyanide m-chlorophenylhydrazine (CCCP) requires active glucose metabolism. Parkin accumulation on mitochondria and subsequent Parkin-dependent mitophagy is abrogated in glucose-free medium or in the presence of 2-deoxy-d-glucose upon CCCP treatment. The defects in Parkin recruitment correlate with intracellular ATP levels and can be attributed to suppression of PINK1 up-regulation in response to mitochondria depolarization. Low levels of ATP appear to prevent PINK1 translation instead of affecting PINK1 mRNA expression or reducing its stability. Consistent with a requirement of ATP for elevated PINK1 levels and Parkin mitochondrial recruitment, local or individual mitochondrial damage via photoirradiation does not affect Parkin recruitment to damaged mitochondria as long as a pool of functional mitochondria is present in the photoirradiated cells even in glucose-free or 2-deoxy-d-glucose-treated conditions. Thus, our data identify ATP as a key regulator for Parkin mitochondrial translocation and sustaining elevated PINK1 levels during mitophagy. PINK1 functions as an AND gate and a metabolic sensor coupling biogenetics of cells and stress signals to mitochondria dynamics.Parkin mitochondrial recruitment upon CCCP treatment requires active glucose metabolism.ResultsATP is a key regulator of PINK1-mediated mitophagy by controlling PINK1 translation levels.ConclusionPINK1 levels decrease in response to low ATP, resulting in inactivation of Parkin-mediate mitophagy.SignificanceShort half-life of PINK1 renders it sensitive to metabolic changes and ATP level. The finding offers insight into bioenergetics of the PINK1-Parkin pathway. Mutations in several genes, including PINK1 and Parkin, are known to cause autosomal recessive cases of Parkinson disease in humans. These genes operate in the same pathway and play a crucial role in mitochondrial dynamics and maintenance. PINK1 is required to recruit Parkin to mitochondria and initiate mitophagy upon mitochondrial depolarization. In this study, we show that PINK1-dependent Parkin mitochondrial recruitment in response to global mitochondrial damage by carbonyl cyanide m-chlorophenylhydrazine (CCCP) requires active glucose metabolism. Parkin accumulation on mitochondria and subsequent Parkin-dependent mitophagy is abrogated in glucose-free medium or in the presence of 2-deoxy-d-glucose upon CCCP treatment. The defects in Parkin recruitment correlate with intracellular ATP levels and can be attributed to suppression of PINK1 up-regulation in response to mitochondria depolarization. Low levels of ATP appear to prevent PINK1 translation instead of affecting PINK1 mRNA expression or reducing its stability. Consistent with a requirement of ATP for elevated PINK1 levels and Parkin mitochondrial recruitment, local or individual mitochondrial damage via photoirradiation does not affect Parkin recruitment to damaged mitochondria as long as a pool of functional mitochondria is present in the photoirradiated cells even in glucose-free or 2-deoxy-d-glucose-treated conditions. Thus, our data identify ATP as a key regulator for Parkin mitochondrial translocation and sustaining elevated PINK1 levels during mitophagy. PINK1 functions as an AND gate and a metabolic sensor coupling biogenetics of cells and stress signals to mitochondria dynamics.Parkin mitochondrial recruitment upon CCCP treatment requires active glucose metabolism. ATP is a key regulator of PINK1-mediated mitophagy by controlling PINK1 translation levels. PINK1 levels decrease in response to low ATP, resulting in inactivation of Parkin-mediate mitophagy." @default.
• W1983060147 created "2016-06-24" @default.
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• W1983060147 date "2015-01-01" @default.
• W1983060147 modified "2023-10-18" @default.
• W1983060147 title "Role of Glucose Metabolism and ATP in Maintaining PINK1 Levels during Parkin-mediated Mitochondrial Damage Responses" @default.
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• W1983060147 doi "https://doi.org/10.1074/jbc.m114.606798" @default.
• W1983060147 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4294517" @default.
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• W1983060147 hasPublicationYear "2015" @default.
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