Matrix proteases in mitochondrial DNA function.

Matrix proteases in mitochondrial DNA function.
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DOI:
10.1016/j.bbagrm.2011.11.008
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发表时间:
2012-09
影响因子:
4.7
通讯作者:
Kaguni, Laurie S.
Kaguni, Laurie S.
中科院分区:
生物学2区
文献类型:
--
作者:
Matsushima, Yuichi;Kaguni, Laurie S.

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Lon、ClpXP和m-AAA是线粒体基质中三种主要的ATP依赖性蛋白酶。所有这三种蛋白质都通过降解受损或异常蛋白质参与一般质量控制。除了这种作用之外,它们还被预测在线粒体DNA功能中发挥作用,包括包装和稳定性、复制、转录和翻译。特别是,Lon与酵母、苍蝇和人类的mtDNA代谢有关。本文综述了Lon蛋白酶在线粒体DNA功能中的作用,并讨论了Lon蛋白酶降解线粒体转录因子A(TFAM)的可能生理作用。我们还讨论了m-AAA和ClpXP在线粒体DNA功能中的可能作用,以及三种基质蛋白酶的假定候选底物。
Lon, ClpXP and m-AAA are the three major ATP-dependent proteases in the mitochondrial matrix. All three are involved in general quality control by degrading damaged or abnormal proteins. In addition to this role, they are predicted to serve roles in mitochondrial DNA functions including packaging and stability, replication, transcription and translation. In particular, Lon has been implicated in mtDNA metabolism in yeast, fly and humans. Here, we review the role of Lon protease in mitochondrial DNA functions, and discuss a putative physiological role for mitochondrial transcription factor A (TFAM) degradation by Lon protease. We also discuss the possible roles of m-AAA and ClpXP in mitochondrial DNA functions, and the putative candidate substrates for the three matrix proteases.
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