Two different axes CALCOCO2-RB1CC1 and OPTN-ATG9A initiate PRKN-mediated mitophagy.

Two different axes CALCOCO2-RB1CC1 and OPTN-ATG9A initiate PRKN-mediated mitophagy.
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DOI:
10.1080/15548627.2020.1815457
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发表时间:
2020-11
期刊:
影响因子:
13.3
通讯作者:
Youle RJ
Youle RJ
中科院分区:
生物学1区
文献类型:
--
作者:
Yamano K;Youle RJ

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PINK 1和PRKN是帕金森病中突变的蛋白质,选择性地放大受损线粒体上的泛素信号,以通过线粒体自噬消除。由于哺乳动物中的所有五种大自噬/自噬受体都具有与泛素和Atg 8家族蛋白结合的结构域,因此认为它们从胞质池中招募Atg 8家族蛋白标记的吞噬细胞。然而,我们最近的研究结果表明,除了Atg 8家族蛋白结合,两个受体CALCOCO 2和OPTN分别与RB 1CC 1和ATG 9A相互作用,表明两个不同的轴,CALCOCO 2-RB 1CC 1和OPTN-ATG 9A,可以启动泛素包被的受损线粒体上自噬膜的从头生物发生。这些结果解释了自噬受体CALCOCO 2和OPTN在线粒体降解中的关键作用,并且它们同时结合多个自噬核心蛋白的能力提出了一种新的功能,即构建多价相互作用的支架,用于在泛素化货物附近协调自噬蛋白的组装。ATG:自噬相关;碳酸钙/NDP 52:钙结合和卷曲螺旋结构域2; CRABP 2:细胞视黄酸结合蛋白2; LIR:MAP 1 LC 3/LC 3相互作用区; MAP 1 LC 3:微管相关蛋白1轻链3; NBR 1:NBR 1自噬货物受体; OPTN:视神经磷酸酶; PINK 1:PTEN诱导的激酶1; PRKN:parkin RBR E3泛素蛋白连接酶; RB 1CC 1/FIP 200:RB 1诱导的卷曲螺旋1; SNIPER:特异性和非遗传性IAP依赖性蛋白擦除器; SQSTM 1/p62:隔离体1; ULK:unc-51样自噬激活激酶
PINK1 and PRKN, proteins mutated in Parkinson disease, selectively amplify ubiquitin signals on damaged mitochondria for elimination via mitophagy. Because all five macroautophagy/autophagy receptors in mammals possess domains binding to ubiquitin and Atg8-family proteins, they were thought to recruit Atg8-family protein labeled phagophores from a cytosolic pool. However, our recent findings show that, in addition to Atg8-family protein binding, two of the receptors CALCOCO2 and OPTN interact with RB1CC1 and ATG9A, respectively, indicating that two different axes, CALCOCO2-RB1CC1 and OPTN-ATG9A, can initiate de novo biogenesis of autophagic membranes on ubiquitin-coated damaged mitochondria. These results explain the critical roles of the autophagy receptors CALCOCO2 and OPTN in mitochondrial degradation, and their abilities to simultaneously bind multiple autophagy core proteins propose a new function, i.e. a scaffold to build multivalent interactions for the orchestrated assembly of autophagy proteins near the ubiquitinated cargo. ATG: autophagy-related; CALCOCO2/NDP52: calcium binding and coiled-coil domain 2; CRABP2: cellular retinoic acid binding protein 2; LIR: MAP1LC3/LC3-interacting region; MAP1LC3: microtubule associated protein 1 light chain 3; NBR1: NBR1 autophagy cargo receptor; OPTN: optineurin; PINK1: PTEN induced kinase 1; PRKN: parkin RBR E3 ubiquitin protein ligase; RB1CC1/FIP200: RB1 inducible coiled-coil 1; SNIPER: specific and nongenetic IAP-dependent protein eraser; SQSTM1/p62: sequestosome 1; ULK: unc-51 like autophagy activating kinase
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发表时间: 2019-04-18
期刊: MOLECULAR CELL
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