了解 eEF1 翻译延伸因子在翻译之外的功能。蛋白质组学方法。

3区 生物学 Q1 Biochemistry, Genetics and Molecular Biology
Boris S Negrutskii, Larysa V Porubleva, Agata Malinowska, Oleksandra V Novosylna, Michal Dadlez, Charlotte R Knudsen
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引用次数: 0

摘要

哺乳动物的翻译延伸因子 eEF1A1 和 eEF1A2 是 92% 的同源异构体,其相互排斥的组织特异性表达在发育过程中受到调控。这两种异构体具有相似的翻译功能,但在空间组织和参与肿瘤发生和病毒繁殖等各种过程方面存在差异。这些差异可能是由于它们与同工酶特异性伙伴蛋白相互作用的能力所致。我们利用已确定的 eEF1A1 或 eEF1A2 伙伴蛋白集来确定细胞复合体和/或特定异构体的过程。结果,我们发现了同工酶特异性的相互作用,反映了不同的 eEF1A 同工酶参与了不同的细胞过程,包括肌动蛋白相关过程、染色质重塑过程、核糖核酸酶 H2、腺苷酸环化酶、Cul3-RING 泛素连接酶复合物以及线粒体转录的启动过程。我们分析的一个重要副产品是阐明了蛋白质生物合成以外的一些细胞过程,这两种同工酶似乎都参与了这些过程,如大核糖体亚基的生物发生、mRNA 剪接、DNA 错配修复、26S 蛋白酶体活性、P 体和外泌体的形成、蛋白质靶向膜等。这些信息表明,细胞中相对较高的 eEF1A 含量可能不仅是维持高效翻译的必要条件,也是确保其参与各种细胞过程的必要条件,在这些过程中,eEF1A 的某些作用尚未被描述。我们相信,本文提供的数据将有助于破译 eEF1A 及其同工型的新辅助功能,并为人类翻译延长机制的这一主要组成部分的已知非经典功能提供一个新的视角。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Understanding functions of eEF1 translation elongation factors beyond translation. A proteomic approach.

Mammalian translation elongation factors eEF1A1 and eEF1A2 are 92% homologous isoforms whose mutually exclusive tissue-specific expression is regulated during development. The isoforms have similar translation functionality, but show differences in spatial organization and participation in various processes, such as oncogenesis and virus reproduction. The differences may be due to their ability to interact with isoform-specific partner proteins. We used the identified sets of eEF1A1 or eEF1A2 partner proteins to identify cell complexes and/or processes specific to one particular isoform. As a result, we found isoform-specific interactions reflecting the involvement of different eEF1A isoforms in different cellular processes, including actin-related, chromatin-remodeling, ribonuclease H2, adenylyl cyclase, and Cul3-RING ubiquitin ligase complexes as well as initiation of mitochondrial transcription. An essential by-product of our analysis is the elucidation of a number of cellular processes beyond protein biosynthesis, where both isoforms appear to participate such as large ribosomal subunit biogenesis, mRNA splicing, DNA mismatch repair, 26S proteasome activity, P-body and exosomes formation, protein targeting to the membrane. This information suggests that a relatively high content of eEF1A in the cell may be necessary not only to maintain efficient translation, but also to ensure its participation in various cellular processes, where some roles of eEF1A have not yet been described. We believe that the data presented here will be useful for deciphering new auxiliary functions of eEF1A and its isoforms, and provide a new look at the known non-canonical functions of this main component of the human translation-elongation machinery.

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来源期刊
Advances in protein chemistry and structural biology
Advances in protein chemistry and structural biology BIOCHEMISTRY & MOLECULAR BIOLOGY-
CiteScore
7.40
自引率
0.00%
发文量
66
审稿时长
>12 weeks
期刊介绍: Published continuously since 1944, The Advances in Protein Chemistry and Structural Biology series has been the essential resource for protein chemists. Each volume brings forth new information about protocols and analysis of proteins. Each thematically organized volume is guest edited by leading experts in a broad range of protein-related topics.
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