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Updated: Mar 11, 2026

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A Reporter Based Cellular Assay for Monitoring Splicing Efficiency
Published on: September 15, 2021
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一个超保守的伪5'拼接站点通过调节TOR相关路径内的替代拼接来微调开发
Zhan Ding1,2,3, Zhuo-Ya Fang1,2,3, Hao Li1,2,3
1Hubei Key Laboratory of Cell Homeostasis, Hubei Provincial Research Center for Basic Biological Sciences, State Key Laboratory of Virology and Biosafety, College of Life Sciences, Wuhan University, Wuhan, China.
Nature communications
|March 10, 2026
概括
超保守的内基元素充当沉声器,通过与拼接机械相互作用来调节基因表达. 这种在物种中保持的机制影响卵巢发育,并响应营养信号通路.
科学领域:
- 进化生物学是进化的生物学.
- 分子遗传学 分子遗传学
- RNA生物学的RNA生物学
背景情况:
- 内子在进化过程中扩大,包含具有未知的功能的超保守的RNA图案.
- 伪-5'拼接位 (伪-5'SSs) 类似于功能拼接位,但没有拼接.
- 超保守的伪-5'SSs (UCP-5'SSs) 在基因调节中的作用在很大程度上尚未被探索.
研究的目的:
- 识别和描述超保守的伪-5的SS (UCP-5的SS).
- 为了研究ENOX1/Enox基因中的特定UCP-5'SS的功能.
- 阐明UCP-5的SSs与营养感应通路有关的调节机制和进化保护.
主要方法:
- 生物信息搜索同源的内子来识别UCP-5的SSs.
- 在Drosophila melanogaster体内进行体内删除实验,以评估表型效应.
- 在突变和野生类型生物中进行RNA测序和替代拼接分析.
- 使用途径抑制剂的细胞培养实验和U1 snRNP-70K翻译的分析.
主要成果:
- 确定了8个UCP-5的SS,其中最保存的位于动物ENOX1/Enox基因中.
- 在Drosophila ENOX1中删除9nt UCP-5'SS导致卵巢膨胀和生育能力增加.
- 这种UCP-5'SS通过与U1 snRNP-核心蛋白相互作用,对上游外基因的替代拼接 (AS) 起到沉声效果.
- 由TOR和胰岛素样途径突变引起的AS变化被UCP-5'SS.的丧失所缓解.
- 用mTOR/胰岛素抑制剂治疗的人类细胞显示了类似的AS变化和增加的U1-70K转化,表明受保护的调节.
结论:
- 一个新型的超保守的内基RNA元素起到抑制器的作用,调节替代拼接.
- 这种调节机制对与TOR相关的营养感知通路敏感.
- 已识别的UCP-5'SS在卵巢发育和生育能力中起着至关重要的作用.
- 这个监管网络的保存性强调了它的进化意义.
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