The Chaperone BAG6 Regulates Cellular Homeostasis between Autophagy and Apoptosis by Holding LC3B.
The Chaperone BAG6 Regulates Cellular Homeostasis between Autophagy and Apoptosis by Holding LC3B.
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分子伴侣 BAG6 通过抑制 LC3B 来调节自噬和凋亡之间的细胞稳态
DOI:
10.1016/j.isci.2020.101708
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发表时间:
2020-11-20
期刊:
影响因子:
5.8
通讯作者:
Liu Y
中科院分区:
文献类型:
--
作者:
Chu Y;Dong X;Kang Y;Liu J;Zhang T;Yang C;Wang Z;Shen W;Huo H;Zhuang M;Lu J;Liu Y
AMFR/gp78 and USP13 are a pair of ubiquitin ligase and deubiquitinase that ensure the accuracy of endoplasmic reticulum-associated degradation (ERAD). Depletion of USP13 leads to caspase activation and cleavage of the ERAD chaperone BAG6, which is reversed by knockdown of AMFR. However, the mechanism and physiological relevance of this regulation are still unclear. Here, by using the NEDDylator system, we screened out TXN as a substrate of AMFR and USP13 and showed its involvement in regulating CASP3 activation and BAG6 cleavage. Furthermore, we showed that the cleaved N-terminal BAG6 is located in the cytosol and interacts with both LC3B-I and unprocessed form of LC3B (Pro-LC3B) through the LIR1 motif to suppress autophagy. An NMR approach verified the direct interaction between BAG6 LIR1 and LC3B-I or Pro-LC3B. Collectively, our findings uncover a mechanism that converts BAG6 from an ERAD regulator to an autophagy tuner and apoptosis inducer during ER stress. AMFR and USP13 regulate CASP3-mediated BAG6 cleavage CASP3 cleaves BAG6 and the cleaved N-terminal BAG6 binds to LC3B-I BAG6 binds to LC3B-I through its LIR1 motif to inhibit autophagosome formation BAG6 regulates cellular homeostasis between autophagy and apoptosis Biological Sciences; Biochemistry; Molecular Biology; Cell Biology
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影响因子:
11.1
作者:
He C;Klionsky DJ
通讯作者:
Klionsky DJ
影响因子:
64.5
作者:
Brodsky JL
通讯作者:
Brodsky JL
影响因子:
64.8
作者:
Hessa, Tara;Sharma, Ajay;Mariappan, Malaiyalam;Eshleman, Heather D.;Gutierrez, Erik;Hegde, Ramanujan S.
通讯作者:
Hegde, Ramanujan S.
影响因子:
64.5
作者:
Gray DC;Mahrus S;Wells JA
通讯作者:
Wells JA
影响因子:
4
作者:
Birgisdottir, Asa Birna;Lamark, Trond;Johansen, Terje
通讯作者:
Johansen, Terje