The chaperone-binding activity of the mitochondrial surface receptor Tom70 protects the cytosol against mitoprotein-induced stress.
The chaperone-binding activity of the mitochondrial surface receptor Tom70 protects the cytosol against mitoprotein-induced stress.
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DOI:
10.1016/j.celrep.2021.108936
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发表时间:
2021-04-06
期刊:
影响因子:
8.8
通讯作者:
Herrmann JM
中科院分区:
文献类型:
--
作者:
Backes S;Bykov YS;Flohr T;Räschle M;Zhou J;Lenhard S;Krämer L;Mühlhaus T;Bibi C;Jann C;Smith JD;Steinmetz LM;Rapaport D;Storchová Z;Schuldiner M;Boos F;Herrmann JM
Most mitochondrial proteins are synthesized as precursors in the cytosol and post-translationally transported into mitochondria. The mitochondrial surface protein Tom70 acts at the interface of the cytosol and mitochondria. In vitro import experiments identified Tom70 as targeting receptor, particularly for hydrophobic carriers. Using in vivo methods and high-content screens, we revisit the question of Tom70 function and considerably expand the set of Tom70-dependent mitochondrial proteins. We demonstrate that the crucial activity of Tom70 is its ability to recruit cytosolic chaperones to the outer membrane. Indeed, tethering an unrelated chaperone-binding domain onto the mitochondrial surface complements most of the defects caused by Tom70 deletion. Tom70-mediated chaperone recruitment reduces the proteotoxicity of mitochondrial precursor proteins, particularly of hydrophobic inner membrane proteins. Thus, our work suggests that the predominant function of Tom70 is to tether cytosolic chaperones to the outer mitochondrial membrane, rather than to serve as a mitochondrion-specifying targeting receptor.
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DOI:
10.1083/jcb.201708044
发表时间:
2018-04-02
期刊:
The Journal of cell biology
影响因子:
--
作者:
Backes S;Hess S;Boos F;Woellhaf MW;Gödel S;Jung M;Mühlhaus T;Herrmann JM
通讯作者:
Herrmann JM
DOI:
10.1007/978-1-61779-276-2_8
发表时间:
2011-01-01
期刊:
NETWORK BIOLOGY: METHODS AND APPLICATIONS
影响因子:
--
作者:
Cohen, Yifat;Schuldiner, Maya
通讯作者:
Schuldiner, Maya
影响因子:
7.8
作者:
Becker, Thomas;Wenz, Lena-Sophie;Pfanner, Nikolaus
通讯作者:
Pfanner, Nikolaus
影响因子:
4.4
作者:
Cox, Juergen;Neuhauser, Nadin;Mann, Matthias
通讯作者:
Mann, Matthias
影响因子:
4.6
作者:
Ben-Menachem R;Wang K;Marcu O;Yu Z;Lim TK;Lin Q;Schueler-Furman O;Pines O
通讯作者:
Pines O