结合ARGONAUTE1的Tudor域蛋白在小干扰RNA生产中起作用,用于RNA导向的DNA甲基化
Takahito Takei1,2, Michio Tsukada3, Kentaro Tamura4
1Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan.
Plant physiology
|March 6, 2024
概括
血管精子特异性蛋白质 PDS5C/E 与 AGO1 相互作用,通过24-nnt siRNA 生产调节可移植元素 (TEs),这对植物进化和适应至关重要.
科学领域:
- 植物分子生物学 植物分子生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 基因组学就是基因组学.
背景情况:
- 可转移元素 (TE) 驱动植物的进化和适应,但它们的调节不太了解.
- 通过RNA导向的DNA甲基化 (RdDM) 是控制植物中TE的关键机制.
- 凝聚蛋白复合体,包括PDS5蛋白质,在基因组稳定性中起作用.
研究的目的:
- 为了研究血管精子特异性PDS5C/E蛋白在TE调节中的功能.
- 确定涉及RdDM的新型交互器和机制.
- 了解PDS5C/E在血管精子发育和适应中的独特作用.
主要方法:
- 蛋白质组学和共同免疫沉以确定蛋白质相互作用.
- RNA测序用于分析突变系中的转录基因变化.
- 小RNA测序以量化siRNA的丰度.
- 用DNA甲基化分析 (CHH) 来评估RdDM的建立.
主要成果:
- 发现了新型的ARGONAUTE 1 (AGO1) 结合蛋白,PDS5C/E. 这些蛋白质的结合性比较强.
- 双重突变pds5c/e显示24-nnt小干扰RNA (siRNA) 积累和TE DNA甲基化中的缺陷.
- PDS5C/E和AGO1在细胞质中进行合作,用于24-nnt siRNA的产生.
- 在pds5c/e突变体中积累的lncRNAs被21nt miRNAs和siRNAs所准.
结论:
- 特定于血管精子的PDS5C/E蛋白质是通过RdDM控制TE的新型调节者.
- PDS5C/E和AGO1在细胞质中起作用,促进24-nt siRNA生物发生.
- 这一途径代表了血管种在进化过程中管理TE增殖的进化机制.
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