A LON-ClpP Proteolytic Axis Degrades Complex I to Extinguish ROS Production in Depolarized Mitochondria.
| Autor: | Pryde KR; Department of Clinical Neurosciences, Institute of Neurology, University College London, London WC1E 6BT, UK. Electronic address: kp296@leicester.ac.uk., Taanman JW; Department of Clinical Neurosciences, Institute of Neurology, University College London, London WC1E 6BT, UK., Schapira AH; Department of Clinical Neurosciences, Institute of Neurology, University College London, London WC1E 6BT, UK. |
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| Jazyk: | angličtina |
| Zdroj: | Cell reports [Cell Rep] 2016 Dec 06; Vol. 17 (10), pp. 2522-2531. |
| DOI: | 10.1016/j.celrep.2016.11.027 |
| Abstrakt: | Mitochondrial dysfunction is implicated in numerous neurodegenerative disorders and in Parkinson's disease (PD) in particular. PINK1 and Parkin gene mutations are causes of autosomal recessive PD, and these respective proteins function cooperatively to degrade depolarized mitochondria (mitophagy). It is widely assumed that impaired mitophagy causes PD, as toxic reactive oxygen species (ROS)-producing mitochondria accumulate and progressively drive neurodegeneration. Instead, we report that a LON-ClpP proteolytic quality control axis extinguishes ROS in depolarized mitochondria by degrading the complex I ROS-generating domain. Complex I deficiency has also been identified in PD brain, and our study provides a compelling non-genetic mechanistic rationale to explain this observation: intact complex I depletes if mitochondrial bioenergetic capacity is robustly attenuated. (Copyright © 2016 The Author(s). Published by Elsevier Inc. All rights reserved.) |
| Databáze: | MEDLINE |
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