人类eRF1的异形2的功能性活性
Alexey Shuvalov1,2, Alexandr Klishin1, Nikita Biziaev1
1Engelhardt Institute of Molecular Biology, The Russian Academy of Sciences, 119991 Moscow, Russia.
International journal of molecular sciences
|July 27, 2024
概括
一个新发现的人类eRF1异型2在调节翻译终结方面发挥了作用. 这种尚未研究的异型与核糖体子单元相互作用,但显示活性降低,影响停止子读透和翻译效率.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 生物化学 生物化学
背景情况:
- 由ETF1编码的真核释放因子1 (eRF1) 对于识别停止编码子和终止翻译至关重要.
- ETF1的替代拼接产生多个转录,包括两个eRF1异形:正规异形1和一个更短,未研究的异形2.
- 异形2比异形1短33个氨基酸,其功能在很大程度上仍未知.
研究的目的:
- 研究未经研究的人类eRF1异型2的功能和特征.
- 确定eRF1异型2在翻译终结中的作用及其与其他翻译因子的相互作用.
- 探索eRF1异型2在基因表达中的潜在调节功能.
主要方法:
- 使用了复制的哺乳动物体外翻译系统.
- 分析了eRF1异形2和核糖体子单元/前终结复合体之间的相互作用.
- 在无细胞系统中评估了子识别,释放,GTPase活性刺激,停止子读透和翻译效率.
主要成果:
- eRF1异型2与核糖体子单元和前终结复合体相互作用,但表现出减少的子识别和释放活动.
- eRF1异形2对UGA编码子表现出单能性,并且与eRF3a相互作用效率较低,对其GTPase活动的刺激效率较低.
- eRF1异型2抑制了停止编码子的读透,并降低了长编码序列的翻译效率.
结论:
- 人类eRF1异型2参与翻译,可能调节翻译终止.
- GTS循环对于eRF1对所有停止子的多电位是很重要的.
- N-domain的体α1可能参与构造变化,促进基-tRNA水解.
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