USP9X controls translation efficiency via deubiquitination of eukaryotic translation initiation factor 4A1.

USP9X controls translation efficiency via deubiquitination of eukaryotic translation initiation factor 4A1.
复制标题

USP9X 通过真核翻译起始因子 4A1 的去泛素化控制翻译效率

DOI:
10.1093/nar/gkx1226
复制
发表时间:
2018-01-25
影响因子:
14.9
通讯作者:
Dang Y
Dang Y
中科院分区:
生物学2区
文献类型:
--
作者:
Li Z;Cheng Z;Raghothama C;Cui Z;Liu K;Li X;Jiang C;Jiang W;Tan M;Ni X;Pandey A;Liu JO;Dang Y

文献摘要

参考文献

被引文献

相似文献

翻译起始的调控是在转录后水平调控基因表达的有效途径。然而,目前关于调控蛋白及其控制翻译起始的模式的知识仍然有限。在这项研究中,我们采用串联亲和纯化和质谱筛选未知的蛋白质与翻译起始机制。泛素特异性肽酶9(USP 9 X)是一种新的结合伴侣,与真核生物翻译起始因子4 B(eIF 4 B)以mRNA非依赖性方式相互作用。USP 9 X缺陷细胞表现出显著受损的新生蛋白质合成、帽依赖性翻译起始和细胞增殖。USP 9 X可以选择性地改变原癌基因mRNA的翻译,如c-Myc和XIAP。此外,我们发现,eIF 4A 1,这是主要在赖氨酸-369泛素化,是USP 9 X的底物。USP 9 X功能障碍增加eIF 4A 1的泛素化并增强其降解。我们的研究结果提供了证据表明,USP 9 X是一种新的调节翻译起始过程中通过去泛素化的eIF 4A 1,这提供了新的见解,了解USP 9 X在人类恶性肿瘤和神经发育障碍的关键作用。
Abstract Controlling translation initiation is an efficient way to regulate gene expression at the post-transcriptional level. However, current knowledge regarding regulatory proteins and their modes of controlling translation initiation is still limited. In this study, we employed tandem affinity purification and mass spectrometry to screen for unknown proteins associated with the translation initiation machinery. Ubiquitin specific peptidase 9, X-linked (USP9X), was identified as a novel binding partner, that interacts with the eukaryotic translation initiation factor 4B (eIF4B) in a mRNA-independent manner. USP9X-deficient cells presented significantly impaired nascent protein synthesis, cap-dependent translation initiation and cellular proliferation. USP9X can selectively alter the translation of pro-oncogenic mRNAs, such as c-Myc and XIAP. Moreover, we found that eIF4A1, which is primarily ubiquitinated at Lys-369, is the substrate of USP9X. USP9X dysfunction increases the ubiquitination of eIF4A1 and enhances its degradation. Our results provide evidence that USP9X is a novel regulator of the translation initiation process via deubiquitination of eIF4A1, which offers new insight in understanding the pivotal role of USP9X in human malignancies and neurodevelopmental disorders.
DOI: 10.1042/bj20080067
发表时间: 2008-04-15
影响因子: 4.1
作者:
Al-Hakim, Abdallah K.;Zagorska, Anna;Alessi, Dario R.
通讯作者: Alessi, Dario R.
DOI: 10.1038/nature11628
发表时间: 2013-01-17
期刊: Nature
影响因子: 64.8
作者:
通讯作者: --
DOI: 10.1016/j.ajhg.2014.02.004
发表时间: 2014-03-06
影响因子: 9.8
作者:
Homan, Claire C.;Kumar, Raman;Jolly, Lachlan A.
通讯作者: Jolly, Lachlan A.
DOI: 10.1073/pnas.1005320107
发表时间: 2010-08-10
影响因子: 11.1
作者:
Furic, Luc;Rong, Liwei;Sonenberg, Nahum
通讯作者: Sonenberg, Nahum
DOI: 10.1007/s10549-006-9393-7
发表时间: 2007-07-01
影响因子: 3.8
作者:
Deng, Shishan;Zhou, Hongying;Yang, Huijun
通讯作者: Yang, Huijun