A trio of ubiquitin ligases sequentially drives ubiquitylation and autophagic degradation of dysfunctional yeast proteasomes.
A trio of ubiquitin ligases sequentially drives ubiquitylation and autophagic degradation of dysfunctional yeast proteasomes.
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三种泛素连接酶依次驱动功能失调的酵母蛋白酶体的泛素化和自噬降解。
DOI:
10.1016/j.celrep.2022.110535
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发表时间:
2022
期刊:
影响因子:
8.8
通讯作者:
Vierstra,RichardD
中科院分区:
文献类型:
--
作者:
Marshall,RichardS;Vierstra,RichardD
As central effectors of ubiquitin (Ub)-mediated proteolysis, proteasomes are regulated at multiple levels, including degradation of unwanted or dysfunctional particles via autophagy (termed proteaphagy). In yeast, inactive proteasomes are exported from the nucleus, sequestered into cytoplasmic aggresomes via the Hsp42 chaperone, extensively ubiquitylated, and then tethered to the expanding phagophore by the autophagy receptor Cue5. Here, we demonstrate the need for ubiquitylation driven by the trio of Ub ligases (E3s), San1, Rsp5, and Hul5, which together with their corresponding E2s work sequentially to promote nuclear export and Cue5 recognition. Whereas San1 functions prior to nuclear export, Rsp5 and Hul5 likely decorate aggresome-localized proteasomes in concert. Ultimately, topologically complex Ub chain(s) containing both K48 and K63 Ub-Ub linkages are assembled, mainly on the regulatory particle, to generate autophagy-competent substrates. Because San1, Rsp5, Hul5, Hsp42, and Cue5 also participate in general proteostasis, proteaphagy likely engages a fundamental mechanism for eliminating inactive/misfolded proteins.
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DOI:
10.1111/j.1432-1033.1985.tb08933.x
发表时间:
1985
期刊:
European journal of biochemistry
影响因子:
--
作者:
B. Çirakoğlu;J. Waller
通讯作者:
J. Waller
DOI:
10.1016/s0021-9258(18)33621-4
发表时间:
1982
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
G. Reid;G. Schatz
通讯作者:
G. Schatz
影响因子:
4.8
作者:
Marc MirandeS;Jean
通讯作者:
Jean
影响因子:
14.9
作者:
L. Pape;A. Tzagoloff
通讯作者:
A. Tzagoloff
影响因子:
--
作者:
Koerner,TJ;Hill,JE;Myers,AM;Tzagoloff,A
通讯作者:
Tzagoloff,A