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Mitochondrial ER contacts are crucial for mitophagy in yeast

机译:线粒体ER接触对于酵母中的噬菌体至关重要

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摘要

Damaged and superfluous mitochondria are removed from the cell by selective autophagy, a process termed mitophagy. This serves to maintain the proper quantity and quality of the organelle. Mitophagy is executed by an evolutionarily conserved pathway, many components of which were first discovered and characterized in yeast. In a systematic screen of a yeast deletion collection, we identified ERMES, a complex connecting mitochondria and the endoplasmic reticulum (ER), as an important factor contributing to the selective degradation of mitochondria. We show that efficient mitophagy depends on mitochondrial ER tethering. ERMES colocalizes with sites of mitophagosome biogenesis and affects the formation of the isolation membrane that engulfs the organelles destined for degradation. These results provide insights into the cellular mechanisms that govern organelle homeostasis.
机译:通过选择性自噬将被破坏的多余线粒体从细胞中清除,这一过程称为线粒体吞噬。这用于维持适当的细胞器数量和质量。线粒体通过进化保守的途径来执行,该途径的许多成分首先在酵母中发现并鉴定。在酵母缺失集合的系统筛选中,我们确定了ERMES(一种复杂的连接线粒体和内质网(ER)的连接),是促成线粒体选择性降解的重要因素。我们表明有效的线粒体依赖于线粒体ER系留。 ERMES与线粒体生物发生的位点共定位并影响隔离膜的形成,该隔离膜吞噬了要降解的细胞器。这些结果为控制细胞器稳态的细胞机制提供了见识。

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