ER tubules mark sites of mitochondrial division.

ER tubules mark sites of mitochondrial division.
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DOI:
10.1126/science.1207385
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发表时间:
2011-10-21
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Voeltz GK
Voeltz GK
中科院分区:
其他
文献类型:
--
作者:
Friedman JR;Lackner LL;West M;DiBenedetto JR;Nunnari J;Voeltz GK

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线粒体的结构和分布受分裂和融合事件的调节。线粒体分裂受Dnm 1/Drp 1调节,Dnm 1/Drp 1是一种动力蛋白相关蛋白,在线粒体周围形成螺旋以介导分裂。关于是什么决定了线粒体网络中线粒体分裂的位点,我们知之甚少。ER和线粒体表现出紧密耦合的动力学,并有广泛的接触。我们测试了ER是否在线粒体分裂中起作用。我们发现,线粒体分裂发生在ER小管接触线粒体和介导的收缩之前Drp 1招聘的位置。因此,内质网小管可能在确定线粒体分裂位点的位置方面发挥积极作用。
Mitochondrial structure and distribution are regulated by division and fusion events. Mitochondrial division is regulated by Dnm1/Drp1, a dynamin-related protein that forms helices around mitochondria to mediate fission. Little is known about what determines sites of mitochondrial fission within the mitochondrial network. The ER and mitochondria exhibit tightly coupled dynamics and have extensive contacts. We tested whether ER plays a role in mitochondrial division. We found that mitochondrial division occurred at positions where ER tubules contacted mitochondria and mediated constriction prior to Drp1 recruitment. Thus, ER tubules may play an active role in defining the position of mitochondrial division sites.
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