Revealing molecular pathways for cancer cell fitness through a genetic screen of the cancer translatome.

Revealing molecular pathways for cancer cell fitness through a genetic screen of the cancer translatome.
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DOI:
10.1016/j.celrep.2021.109321
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发表时间:
2021-06-29
期刊:
影响因子:
8.8
通讯作者:
Ruggero D
Ruggero D
中科院分区:
生物学1区
文献类型:
--
作者:
Kuzuoglu-Ozturk D;Hu Z;Rama M;Devericks E;Weiss J;Chiang GG;Worland ST;Brenner SE;Goodarzi H;Gilbert LA;Ruggero D

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The major cap-binding protein eukaryotic translation initiation factor 4E (eIF4E), an ancient protein required for translation of all eukaryotic genomes, is a surprising yet potent oncogenic driver. The genetic interactions that maintain the oncogenic activity of this key translation factor remain unknown. In this study, we carry out a genome-wide CRISPRi screen wherein we identify more than 600 genetic interactions that sustain eIF4E oncogenic activity. Our data show that eIF4E controls the translation of Tfeb, a key executer of the autophagy response. This autophagy survival response is triggered by mitochondrial proteotoxic stress, which allows cancer cell survival. Our screen also reveals a functional interaction between eIF4E and a single anti-apoptotic factor, Bcl-xL, in tumor growth. Furthermore, we show that eIF4E and the exon-junction complex (EJC), which is involved in many steps of RNA metabolism, interact to control the migratory properties of cancer cells. Overall, we uncover several cancer-specific vulnerabilities that provide further resolution of the cancer translatome. Kuzuoglu-Ozturk et al. identify more than 600 genetic interactions that sustain oncogenic activity of the major cap-binding protein eIF4E by a genome-wide CRIPSRi screen. Their data reveal interactions among distinct cellular processes and eIF4E, uncovering several cancer-specific vulnerabilities.
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