Mitofusin-2 independent juxtaposition of endoplasmic reticulum and mitochondria: an ultrastructural study.

Mitofusin-2 independent juxtaposition of endoplasmic reticulum and mitochondria: an ultrastructural study.
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DOI:
10.1371/journal.pone.0046293
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Orci L
Orci L
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Cosson P;Marchetti A;Ravazzola M;Orci L

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除了其在控制线粒体形态中的作用之外,主要基于光学显微镜分析,已经提出线粒体融合蛋白-2将线粒体拴系到内质网(ER)。在这项研究中,我们已经研究了电子显微镜组织的ER和线粒体的细胞表达或不mitofusin-2。与以前的研究相反,我们观察到mitofusin-2的丢失增加了ER-线粒体的并列。这些结果表明,mitofusin-2并没有发挥关键作用的ER和线粒体的并列,并强调了重要作用的超微结构分析,可视化和测量两个细胞内室之间的接触。
Besides its role in controlling the morphology of mitochondria, mitofusin-2 has been proposed to tether mitochondria to the endoplasmic reticulum (ER), based largely on light microscopic analysis. In this study we have examined by electron microscopy the organization of ER and mitochondria in cells expressing or not mitofusin-2. Contrary to previous studies, we observed that loss of mitofusin-2 increased ER-mitochondria juxtaposition. These results suggest that mitofusin-2 does not play a critical role in the juxtapostion of ER and mitochondria, and highlight the essential role of ultrastructural analysis to visualize and measure contact between two intracellular compartments.
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