Parkin is recruited selectively to impaired mitochondria and promotes their autophagy.

Parkin is recruited selectively to impaired mitochondria and promotes their autophagy.
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DOI:
10.1083/jcb.200809125
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发表时间:
2008-12-01
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Youle RJ
Youle RJ
中科院分区:
其他
文献类型:
--
作者:
Narendra D;Tanaka A;Suen DF;Youle RJ

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编码泛素连接酶Parkin的基因Park2的功能缺失突变是早发性帕金森病的重要原因。虽然帕金在神经元维持中的作用尚不清楚,但最近的工作将帕金与线粒体的调节联系起来。其损失与果蝇中的线粒体肿胀和肌肉变性有关,以及与其他物种中的线粒体功能障碍和对线粒体毒素的易感性增加有关。在这里,我们表明,帕金被选择性地招募到哺乳动物细胞中具有低膜电位的功能失调的线粒体。募集后,帕金介导自噬体对线粒体的吞噬和受损线粒体的选择性消除。这些结果表明,帕金促进受损线粒体的自噬,并暗示在帕金森病的发病机制中未能消除功能障碍的线粒体。
Loss-of-function mutations in Park2, the gene coding for the ubiquitin ligase Parkin, are a significant cause of early onset Parkinson's disease. Although the role of Parkin in neuron maintenance is unknown, recent work has linked Parkin to the regulation of mitochondria. Its loss is associated with swollen mitochondria and muscle degeneration in Drosophila melanogaster, as well as mitochondrial dysfunction and increased susceptibility to mitochondrial toxins in other species. Here, we show that Parkin is selectively recruited to dysfunctional mitochondria with low membrane potential in mammalian cells. After recruitment, Parkin mediates the engulfment of mitochondria by autophagosomes and the selective elimination of impaired mitochondria. These results show that Parkin promotes autophagy of damaged mitochondria and implicate a failure to eliminate dysfunctional mitochondria in the pathogenesis of Parkinson's disease.
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