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伪尤里丁指导生殖细菌小RNA传输和表观遗传遗传
Rowan P Herridge1,2, Jakub Dolata1,3, Valentina Migliori4,5
1Howard Hughes Medical Institute, Cold Spring Harbor Laboratory, Cold Spring Harbor, NY, USA.
Nature structural & molecular biology
|September 6, 2024
概括
伪尤里丁 (Ψ) 标记是植物和动物遗传的小RNA. 这种修改指导着小RNA的运输,比如表观遗传激活小干扰RNA (easiRNA),对于生殖线遗传和种子发育至关重要.
科学领域:
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 在RNA生物学,RNA生物学.
- 发展生物学 发展生物学
背景情况:
- 表观遗传修饰在很大程度上是在雌同体形成期间重置的,但有些是遗传的.
- 小RNAs介导表观遗传修饰,但区分遗传小RNAs的机制仍然不清楚.
- 伪尤里丁 (Ψ),一种普遍存在的RNA修饰,尚未在小RNA中进行研究.
研究的目的:
- 调查伪尿素 (Ψ) 在遗传小RNA中的存在和作用.
- 探索植物生殖系中小RNA运输的机制.
- 了解 Ψ 在表观遗传和种子发育中的作用.
主要方法:
- 在短RNA序列中检测伪尿素 (Ψ) 的测试方法的开发.
- 在来自小鼠和Arabidopsis的微RNA中检测 Ψ.
- 对PAUSED/HEN5 (PSD) 与 Ψ 和小RNA传输有关的遗传分析.
- 研究出口in-t函数在triploid块中的研究.
主要成果:
- 伪尤里丁 (Ψ) 存在于小鼠和阿拉比多普西斯的微RNA中.
- 细菌小RNAs,包括Arabidopsis easiRNAs和小鼠Piwi交互RNAs,为 Ψ.
- 伪尿化easiRNAs从植物核转移到Arabidopsis花粉中的精子细胞.
- 这种运输需要PAUSED/HEN5 (PSD),Exportin-t的同类物,并且与 Ψ.基因相互作用.
- 导出-t对于防止三倍体阻断,一种表观遗传遗传的种子致命性的形式至关重要.
结论:
- 伪尤里丁 (Ψ) 作为植物和动物生殖系中遗传小RNA的保存标记.
- Ψ修饰对于将小RNA运送到生殖细胞至关重要.
- 导出蛋白在调解遗传小RNAs对种子发育的影响方面发挥着保留作用.
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