Systematic analysis of ribophagy in human cells reveals bystander flux during selective autophagy.
Systematic analysis of ribophagy in human cells reveals bystander flux during selective autophagy.
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人类细胞中核能的系统分析揭示了选择性自噬期间旁观者的通量。
DOI:
10.1038/s41556-017-0007-x
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发表时间:
2018-03
影响因子:
21.3
通讯作者:
Harper JW
中科院分区:
文献类型:
--
作者:
An H;Harper JW
Ribosomes are abundant cellular machines regulated by assembly, supernumerary subunit turnover, and nascent chain quality control mechanisms. Moreover, nitrogen starvation in yeast has been reported to promote selective ribosome delivery to the vacuole in an autophagy conjugation system-dependent manner, a process called “ribophagy”. However, whether ribophagy in mammals is selective or regulated is unclear. Using Ribo-Keima flux reporters, we find that starvation or mTOR inhibition promotes VPS34-dependent ribophagic flux, which unlike yeast, is largely ATG8 conjugation independent and occurs concomitantly with other cytosolic protein autophagic flux reporters. Ribophagic flux was not induced upon inhibition of translational elongation or nascent chain uncoupling, but was induced in a comparatively selective manner upon proteotoxic stress via arsenite or chromosome mis-segregation dependent upon VPS34 and ATG8 conjugation. Unexpectedly, agents typically used to induce selective autophagy also promoted increased ribosome and cytosolic protein reporter flux, suggesting significant bulk or “by-stander” autophagy during what is often considered selective autophagy. These results emphasize the importance of monitoring non-specific cargo flux when assessing selective autophagy pathways.
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影响因子:
3.3
作者:
Sung MK;Reitsma JM;Sweredoski MJ;Hess S;Deshaies RJ
通讯作者:
Deshaies RJ
影响因子:
64.5
作者:
Liu J;Xia H;Kim M;Xu L;Li Y;Zhang L;Cai Y;Norberg HV;Zhang T;Furuya T;Jin M;Zhu Z;Wang H;Yu J;Li Y;Hao Y;Choi A;Ke H;Ma D;Yuan J
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Yuan J
影响因子:
10.5
作者:
Santaguida S;Vasile E;White E;Amon A
通讯作者:
Amon A
影响因子:
16
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Higgins, Renee;Gendron, Joshua M.;Rising, Lisa;Mak, Raymond;Webb, Kristofor;Kaiser, Stephen E.;Zuzow, Nathan;Riviere, Paul;Yang, Bing;Fenech, Emma;Tang, Xin;Lindsay, Scott A.;Christianson, John C.;Hampton, Randolph Y.;Wasserman, Steven A.;Bennett, Eric J.
通讯作者:
Bennett, Eric J.
DOI:
10.1083/jcb.201001036
发表时间:
2010-07-12
期刊:
The Journal of cell biology
影响因子:
--
作者:
Santaguida S;Tighe A;D'Alise AM;Taylor SS;Musacchio A
通讯作者:
Musacchio A