Signaling the mitochondrial unfolded protein response.

Signaling the mitochondrial unfolded protein response.
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DOI:
10.1016/j.bbamcr.2012.02.019
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发表时间:
2013-02
影响因子:
5.1
通讯作者:
Haynes, Cole M.
Haynes, Cole M.
中科院分区:
生物学2区
文献类型:
--
作者:
Pellegrino, Mark W.;Nargund, Amrita M.;Haynes, Cole M.

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线粒体是一种区室化的细胞器,对许多细胞功能至关重要,包括ATP生成、铁硫簇生物合成、核苷酸和氨基酸代谢以及凋亡。为了促进生物发生和适当的功能,线粒体具有专用的分子伴侣库以促进蛋白质折叠和质量控制蛋白酶以降解那些不能正确折叠的蛋白质。线粒体蛋白质折叠受到复杂的细胞器结构、电子传递链产生的活性氧的有害影响以及线粒体基因组对获得突变的易感性的挑战。为了响应未折叠或错误折叠的蛋白质的积累超过细胞器的伴侣蛋白的能力,细胞安装线粒体未折叠蛋白质反应(UPRmt)。UPRmt是线粒体至核信号转导途径,导致诱导线粒体保护基因,包括线粒体分子伴侣和蛋白酶,以在线粒体蛋白折叠环境内重建蛋白质稳态。在这里,我们回顾了目前对UPRmt信号转导的理解和UPRmt对病变细胞的影响。
Mitochondria are compartmentalized organelles essential for numerous cellular functions including ATP generation, iron-sulfur cluster biogenesis, nucleotide and amino acid metabolism as well as apoptosis. To promote biogenesis and proper function, mitochondria have a dedicated repertoire of molecular chaperones to facilitate protein folding and quality control proteases to degrade those proteins that fail to fold correctly. Mitochondrial protein folding is challenged by the complex organelle architecture, the deleterious effects of electron transport chain-generated reactive oxygen species and the mitochondrial genome’s susceptibility to acquiring mutations. In response to the accumulation of unfolded or misfolded proteins beyond the organelle’s chaperone capacity, cells mount a mitochondrial unfolded protein response (UPRmt). The UPRmt is a mitochondria-to-nuclear signal transduction pathway resulting in the induction of mitochondrial protective genes including mitochondrial molecular chaperones and proteases to re-establish protein homeostasis within the mitochondrial protein-folding environment. Here, we review the current understanding of UPRmt signal transduction and the impact of the UPRmt on diseased cells.
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