The porin VDAC2 is the mitochondrial platform for Bax retrotranslocation.

The porin VDAC2 is the mitochondrial platform for Bax retrotranslocation.
复制标题

DOI:
10.1038/srep32994
复制
发表时间:
2016-09-13
期刊:
影响因子:
4.6
通讯作者:
Edlich F
Edlich F
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Lauterwasser J;Todt F;Zerbes RM;Nguyen TN;Craigen W;Lazarou M;van der Laan M;Edlich F

文献摘要

参考文献

被引文献

相似文献

促凋亡Bcl-2蛋白Bax可以使线粒体外膜透化,从而使人细胞凋亡。Bax通过不断易位到线粒体和逆易位回到胞质溶胶来调节。Bax的逆转位依赖于促生存Bcl-2蛋白并稳定失活的Bax。在这里,我们表明,Bax retrotranslocation穿梭膜相关和膜整合Bax从孤立的线粒体。我们进一步发现线粒体孔蛋白电压依赖性阴离子通道2(VDAC 2)作为Bax逆转录转运的重要组成部分和平台。VDAC 2确保Bax的细胞膜特异性结合,并且在不存在VDAC 2的情况下,Bax定位于其他细胞区室。Bax的逆转位也受到核苷酸和钙离子的调控,这表明这些离子通过VDAC 2在Bax逆转位中的转运可能发挥作用。总之,我们的研究结果揭示了VDAC 2的意想不到的双功能作用,将Bax特异性靶向线粒体,并确保Bax通过逆转位到胞质溶胶中来抑制。
The pro-apoptotic Bcl-2 protein Bax can permeabilize the outer mitochondrial membrane and therefore commit human cells to apoptosis. Bax is regulated by constant translocation to the mitochondria and retrotranslocation back into the cytosol. Bax retrotranslocation depends on pro-survival Bcl-2 proteins and stabilizes inactive Bax. Here we show that Bax retrotranslocation shuttles membrane-associated and membrane-integral Bax from isolated mitochondria. We further discover the mitochondrial porin voltage-dependent anion channel 2 (VDAC2) as essential component and platform for Bax retrotranslocation. VDAC2 ensures mitochondria-specific membrane association of Bax and in the absence of VDAC2 Bax localizes towards other cell compartments. Bax retrotranslocation is also regulated by nucleotides and calcium ions, suggesting a potential role of the transport of these ions through VDAC2 in Bax retrotranslocation. Together, our results reveal the unanticipated bifunctional role of VDAC2 to target Bax specifically to the mitochondria and ensure Bax inhibition by retrotranslocation into the cytosol.
在digiton-溶解小脑颗粒神经元中鉴定BAX-电压依赖性阴离子通道1复合物。
DOI: 10.1111/j.1471-4159.2011.07499.x
发表时间: 2011-12
影响因子: 4.7
作者:
Huckabee DB;Jekabsons MB
通讯作者: Jekabsons MB
DOI: 10.1073/pnas.94.8.3668
发表时间: 1997-04-15
影响因子: 11.1
作者:
Hsu, YT;Wolter, KG;Youle, RJ
通讯作者: Youle, RJ
DOI: 10.4161/23723556.2014.995029
发表时间: 2015-01-01
影响因子: 2.1
作者:
Edlich, Frank
通讯作者: Edlich, Frank
DOI: 10.1023/b:mcbi.0000009862.17396.8d
发表时间: 2004-01-01
影响因子: 4.3
作者:
Colombini, M
通讯作者: Colombini, M
DOI: 10.1016/j.molcel.2009.11.008
发表时间: 2009-11-25
期刊: MOLECULAR CELL
影响因子: 16
作者:
Dewson, Grant;Kratina, Tobias;Kluck, Ruth M.
通讯作者: Kluck, Ruth M.