SUMO peptidase ULP-4 regulates mitochondrial UPR-mediated innate immunity and lifespan extension

SUMO peptidase ULP-4 regulates mitochondrial UPR-mediated innate immunity and lifespan extension
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SUMO 肽酶 ULP-4 调节线粒体 UPR 介导的先天免疫和寿命延长

DOI:
10.7554/elife.41792
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发表时间:
2019-01-15
期刊:
影响因子:
7.7
通讯作者:
Liu, Ying
Liu, Ying
中科院分区:
生物学1区
文献类型:
--
作者:
Gao, Kaiyu;Li, Yi;Liu, Ying

文献摘要

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动物通过诱导线粒体未折叠蛋白反应(UPRmt)来应对线粒体应激。 UPRmt 激活后会发生一系列级联事件,最终触发由两个转录因子 DVE-1 和 ATFS-1 控制的转录反应。在这里,我们将 SUMO 特异性肽酶 ULP-4 确定为线虫 UPRmt 的正调节因子,以控制 DVE-1 和 ATFS-1 的 SUMO 化状态。 SUMO化以不同的机制影响 UPRmt 转录程序中的这两个轴:DVE-1 亚细胞定位的变化与 ATFS-1 稳定性和活性的变化。我们的研究结果揭示了一种翻译后修饰,可在线粒体应激期间促进免疫反应和延长寿命。
Animals respond to mitochondrial stress with the induction of mitochondrial unfolded protein response (UPRmt). A cascade of events occur upon UPRmt activation, ultimately triggering a transcriptional response governed by two transcription factors: DVE-1 and ATFS-1. Here we identify SUMO-specific peptidase ULP-4 as a positive regulator of C. elegans UPRmt to control SUMOylation status of DVE-1 and ATFS-1. SUMOylation affects these two axes in the transcriptional program of UPRmt with distinct mechanisms: change of DVE-1 subcellular localization vs. change of ATFS-1 stability and activity. Our findings reveal a post-translational modification that promotes immune response and lifespan extension during mitochondrial stress.