Filament formation by the translation factor eIF2B regulates protein synthesis in starved cells
Filament formation by the translation factor eIF2B regulates protein synthesis in starved cells
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翻译因子 eIF2B 形成丝状体调节饥饿细胞中的蛋白质合成
DOI:
10.1101/467829
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发表时间:
--
期刊:
影响因子:
--
通讯作者:
S. Alberti
中科院分区:
文献类型:
--
作者:
E. Nüske;G. Marini;D. Richter;W. Leng;A. Bogdanova;T. M. Franzmann;G. Pigino;S. Alberti
Cells exposed to starvation have to adjust their metabolism to conserve energy and protect themselves. Protein synthesis is one of the major energy-consuming processes and as such has to be tightly controlled. Many mechanistic details about how starved cells regulate the process of protein synthesis are still unknown. Here, we report that the essential translation initiation factor eIF2B forms filaments in starved budding yeast cells. We demonstrate that filamentation is triggered by starvation-induced acidification of the cytosol, which is caused by an influx of protons from the extracellular environment. We show that filament assembly by eIF2B is necessary for rapid and efficient downregulation of translation. Importantly, this mechanism does not require the kinase Gcn2. Furthermore, analysis of site-specific variants suggests that eIF2B assembly results in enzymatically inactive filaments that promote stress survival and fast recovery of cells from starvation. We propose that translation regulation through filament assembly is an efficient mechanism that allows yeast cells to adapt to fluctuating environments.
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影响因子:
3.3
作者:
Eleanor Taylor;S. Campbell;Christian D. Griffiths;P. Reid;John W. Slaven;Richard J Harrison;Paul F. G. Sims;G. Pavitt;D. Delneri;M. Ashe
通讯作者:
M. Ashe
影响因子:
4
作者:
L. Lindahl;A. Hinnebusch
通讯作者:
A. Hinnebusch
影响因子:
56.9
作者:
Franzmann, Titus M.;Jahnel, Marcus;Alberti, Simon
通讯作者:
Alberti, Simon
影响因子:
4.5
作者:
Farny, Natalie G.;Kedersha, Nancy L.;Silver, Pamela A.
通讯作者:
Silver, Pamela A.
DOI:
10.4236/abb.2011.23021
发表时间:
2011-06
期刊:
Advances in bioscience and biotechnology (Print)
影响因子:
--
作者:
Mahon MJ
通讯作者:
Mahon MJ