The selective macroautophagic degradation of aggregated proteins requires the PI3P-binding protein Alfy.
The selective macroautophagic degradation of aggregated proteins requires the PI3P-binding protein Alfy.
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DOI:
10.1016/j.molcel.2010.04.007
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发表时间:
2010-04-23
期刊:
影响因子:
16
通讯作者:
Yamamoto A
中科院分区:
文献类型:
--
作者:
Filimonenko M;Isakson P;Finley KD;Anderson M;Jeong H;Melia TJ;Bartlett BJ;Myers KM;Birkeland HC;Lamark T;Krainc D;Brech A;Stenmark H;Simonsen A;Yamamoto A
There is growing evidence that macroautophagic cargo is not limited to bulk cytosol in response to starvation, and can occur selectively for substrates including aggregated proteins. It remains unclear, however, if starvation-induced and selective macroautophagy share identical adapter molecules to capture their cargo. Here we report that Alfy, a phosphatidylinositol 3-phosphate binding protein, is central to the selective elimination of aggregated proteins. We report that the loss of Alfy inhibits the clearance of inclusions, with little to no effect on the starvation response. Alfy is recruited to intracellular inclusions and scaffolds a complex between p62(SQSTM1)-positive proteins and the autophagic effectors Atg5, Atg12, Atg16L and LC3. Alfy overexpression leads to elimination of aggregates in an Atg5-dependent manner, and likewise, to protection in a neuronal and Drosophila model of polyglutamine toxicity. We propose that Alfy plays a key role in selective macroautophagy, by bridging cargo to the molecular machinery that builds autophagosomes.
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DOI:
10.1083/jcb.143.7.1883
发表时间:
1998-12-28
期刊:
The Journal of cell biology
影响因子:
--
作者:
Johnston JA;Ward CL;Kopito RR
通讯作者:
Kopito RR
影响因子:
64.5
作者:
Kawaguchi, Y;Kovacs, JJ;Yao, TP
通讯作者:
Yao, TP
影响因子:
16
作者:
Kirkin, Vladimir;Lamark, Trond;Johansen, Terje
通讯作者:
Johansen, Terje
影响因子:
3.7
作者:
Lindmo, Karine;Simonsen, Anne;Stenmark, Harald
通讯作者:
Stenmark, Harald
影响因子:
7.8
作者:
Bjorkoy, Geir;Lamark, Trond;Brech, Andreas;Outzen, Heidi;Perander, Maria;Overvatn, Aud;Stenmark, Harald;Johansen, Terje
通讯作者:
Johansen, Terje