Atg32 is a mitochondrial protein that confers selectivity during mitophagy.

Atg32 is a mitochondrial protein that confers selectivity during mitophagy.
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ATG32是一种线粒体蛋白,在线粒体过程中赋予了选择性。

DOI:
10.1016/j.devcel.2009.06.014
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发表时间:
2009-07
期刊:
影响因子:
11.8
通讯作者:
Klionsky, Daniel J.
Klionsky, Daniel J.
中科院分区:
生物学1区
文献类型:
--
作者:
Kanki, Tomotake;Wang, Ke;Cao, Yang;Baba, Misuzu;Klionsky, Daniel J.

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线粒体质量控制对维持适当的细胞内环境平衡很重要。尽管通过自噬(有丝分裂)选择性降解线粒体被认为对质量控制有重要作用,而且有证据表明有丝分裂与神经退行性疾病有直接关系,但有丝分裂的分子机制尚不清楚。通过对丝裂原缺乏突变体的筛选,我们发现YIL146C/ECM37是丝裂原吞噬所必需的。该基因对于其他类型的选择性自噬或非特异性巨型自噬不是必需的。我们将这个自噬相关基因命名为ATG32。Atg32蛋白定位于线粒体。在诱导有丝分裂后,Atg32与Atg11结合,Atg11是一种选择性自噬的适配器蛋白,然后Atg32被招募到液泡中,并与线粒体一起输入到液泡中。因此,Atg32为线粒体作为货物的隔离提供了选择性,并且对于自噬机制招募这种细胞器进行有丝分裂是必要的。
Mitochondrial quality control is important to maintain proper cellular homeostasis. Although selective mitochondrial degradation by autophagy (mitophagy) is suggested to have an important role for quality control and there is evidence for a direct relation between mitophagy and neurodegenerative diseases, the molecular mechanism of mitophagy is poorly understood. Using a screen for mitophagy-deficient mutants, we found that YIL146C/ECM37 is essential for mitophagy. This gene is not required for other types of selective autophagy or for nonspecific macroautophagy. We designated this autophagy-related (ATG) gene as ATG32. The Atg32 protein localizes on mitochondria. Following the induction of mitophagy, Atg32 binds Atg11, an adaptor protein for selective types of autophagy, and then Atg32 is recruited to and imported into the vacuole along with mitochondria. Therefore, Atg32 confers selectivity for mitochondrial sequestration as a cargo and is necessary for recruitment of this organelle by the autophagy machinery for mitophagy.
用电子显微镜研究的新生小鼠肾脏中的细胞分化。
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