Deacetylation of ATG4B promotes autophagy initiation under starvation.
Deacetylation of ATG4B promotes autophagy initiation under starvation.
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ATG4B 去乙酰化促进饥饿条件下自噬的启动
DOI:
10.1126/sciadv.abo0412
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发表时间:
2022-08-05
期刊:
影响因子:
13.6
通讯作者:
中科院分区:
文献类型:
--
作者:
Eukaryotes initiate autophagy when facing environmental changes such as a lack of external nutrients. However, the mechanisms of autophagy initiation are still not fully elucidated. Here, we showed that deacetylation of ATG4B plays a key role in starvation-induced autophagy initiation. Specifically, we demonstrated that ATG4B is activated during starvation through deacetylation at K39 by the deacetylase SIRT2. Moreover, starvation triggers SIRT2 dephosphorylation and activation in a cyclin E/CDK2 suppression–dependent manner. Meanwhile, starvation down-regulates p300, leading to a decrease in ATG4B acetylation at K39. K39 deacetylation also enhances the interaction of ATG4B with pro-LC3, which promotes LC3-II formation. Furthermore, an in vivo experiment using Sirt2 knockout mice also confirmed that SIRT2-mediated ATG4B deacetylation at K39 promotes starvation-induced autophagy initiation. In summary, this study reveals an acetylation-dependent regulatory mechanism that controls the role of ATG4B in autophagy initiation in response to nutritional deficiency.
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DOI:
10.1038/nri.2016.100
发表时间:
2016-11
期刊:
Nature reviews. Immunology
影响因子:
--
作者:
Cadwell K
通讯作者:
Cadwell K
影响因子:
13.3
作者:
Cabrera, Sandra;Fernandez, Alvaro F.;Lopez-Otin, Carlos
通讯作者:
Lopez-Otin, Carlos
影响因子:
15.9
作者:
Marino, Guillermo;Fernandez, Alvaro F.;Lopez-Otin, Carlos
通讯作者:
Lopez-Otin, Carlos
影响因子:
13.3
作者:
Kauffman, Karlina J.;Yu, Shenliang;Melia, Thomas J.
通讯作者:
Melia, Thomas J.
影响因子:
5.5
作者:
Fagundes R;Teixeira LK
通讯作者:
Teixeira LK