通过针对eIF6来将核糖体子单元封存为非活性80S,限制了线粒体退出和癌症进展
Poonam Roshan1, Aparna Biswas1, Sinthyia Ahmed1
1Department of Biology, Saint Louis University, 3507 Laclede Ave, Saint Louis, MO 63103, USA.
Nucleic acids research
|December 27, 2024
概括
细胞转化启动因子-6 (eIF6) 调节核糖体活动,影响转化,分裂和癌症. 破坏eIF6功能会增加空缺的80S核糖体,导致细胞周期缺陷并限制癌症的入侵.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 全球转化率取决于调节活跃的核糖体子单元.
- 细胞转化启动因子-6 (eIF6) 对于调节60S核糖体子单元至关重要.
- 从60S子单元释放eIF6对于60S-40S子单元相互作用至关重要.
研究的目的:
- 研究eIF6在核糖体生物发生和翻译中的独特功能.
- 阐明eIF6在线粒分裂和癌症进展中的作用.
- 分析破坏eIF6与60S子单元相互作用的影响.
主要方法:
- 利用eIF6-N106S突变来破坏eIF6-60S子单元的相互作用.
- 进行了Ribo-seq分析,以评估翻译效率.
- 与癌症侵袭性相关的eIF6过度表达.
主要成果:
- 破坏eIF6相互作用增加了空缺的80S核糖体和放松的翻译,特别是在线索分裂.
- eIF6-N106S突变导致染色体分离缺陷和线粒体灾难.
- 线粒体因子和长3' UTR 的转录的翻译效率下调.
- eIF6-N106S突变限制了癌症入侵,与高度癌症中的eIF6过度表达有关.
结论:
- eIF6具有与其在60S子单元生物发生中的作用分开的独特的反协会活动.
- eIF6调节了80S核糖体的可用性,影响了转化,线粒分裂和癌症的进展.
- 放松eIF6的调节可能不是癌症发展的早期事件.
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