SSH1 impedes SQSTM1/p62 flux and MAPT/Tau clearance independent of CFL (cofilin) activation.
SSH1 impedes SQSTM1/p62 flux and MAPT/Tau clearance independent of CFL (cofilin) activation.
复制标题
SSH 1阻碍SQSTM 1/p62通量和MAPT/Tau清除,与CFL(cofilin)激活无关。
DOI:
10.1080/15548627.2020.1816663
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发表时间:
2021-09
期刊:
影响因子:
13.3
通讯作者:
Kang DE
中科院分区:
文献类型:
--
作者:
Fang C;Woo JA;Liu T;Zhao X;Cazzaro S;Yan Y;Matlack J;Kee T;LePochat P;Kang DE
Accumulation of toxic protein assemblies and damaged mitochondria are key features of neurodegenerative diseases, which arise in large part from clearance defects in the Macroautophagy/autophagy-lysosome system. The autophagy cargo receptor SQSTM1/p62 plays a major role in the clearance of ubiquitinated cargo through Ser403 phosphorylation by multiple kinases. However, no phosphatase is known to physiologically dephosphorylate SQSTM1 on this activating residue. RNAi-mediated knockdown and overexpression experiments using genetically encoded fluorescent reporters and defined mutant constructs in cell lines, primary neurons, and brains show that SSH1, the canonical CFL (cofilin) phosphatase, mediates the dephosphorylation of phospho-Ser403-SQSTM1, thereby impairing SQSTM1 flux and phospho-MAPT/tau clearance. The inhibitory action of SSH1 on SQSTM1 is fully dependent on SQSTM1 Ser403 phosphorylation status and is separable from SSH1-mediated CFL activation. These findings reveal a unique action of SSH1 on SQSTM1 independent of CFL and implicate an inhibitory role of SSH1 in SQSTM1-mediated clearance of autophagic cargo, including phospho-MAPT/tau. Abbreviations: AAV: adeno-associated virus; Aβ42O: amyloid β1-42 oligomers; AD: Alzheimer disease; CA3: cornu Ammonis 3; CSNK2/CK2: casein kinase 2; FCCP: 2-[2-[4-(trifluoromethoxy)phenyl]hydrazinylidene]-propanedinitrile; FTLD: frontotemporal lobar degeneration; GFP: green fluorescent protein; MAP1LC3/LC3: microtubule associated protein 1 light chain 3; SQSTM1/p62: sequestosome-1; PLA: proximity ligation assay; RFP: red fluorescent protein; RIPA: radioimmunoprecipitation assay; shRNA: short hairpin RNA; siRNA: small interfering RNA; Ser403: Serine403; SSH1: slingshot protein phosphatase 1; TBK1: TANK-binding kinase 1; ULK: unc-51 like kinase 1
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影响因子:
29
作者:
Kimmelman AC;White E
通讯作者:
White E
DOI:
10.1186/bcr2232
发表时间:
2009
期刊:
Breast cancer research : BCR
影响因子:
--
作者:
Eiseler T;Döppler H;Yan IK;Goodison S;Storz P
通讯作者:
Storz P
影响因子:
3.5
作者:
Chen H;Chan DC
通讯作者:
Chan DC
影响因子:
5.3
作者:
Boland, Barry;Kumar, Asok;Lee, Sooyeon;Platt, Frances M.;Wegiel, Jerzy;Yu, W. Haung;Nixon, Ralph A.
通讯作者:
Nixon, Ralph A.
影响因子:
46.9
作者:
Fredriksson, S;Gullberg, M;Landegren, U
通讯作者:
Landegren, U