使用遗传学保存和分歧模式识别小RNA通路基因
Yuval Tabach1, Allison C Billi, Gabriel D Hayes
1Department of Molecular Biology, Massachusetts General Hospital, Boston, Massachusetts 02114, USA.
Nature
|February 1, 2013
概括
研究人员通过分析真核生物基因组,确定了对RNA干扰 (RNAi) 和microRNA (miRNA) 途径至关重要的新蛋白质. 许多新发现的小RNA路径共因子与RNA剪接有关,这表明这些过程之间存在着深厚的联系.
科学领域:
- 基因组学和分子生物学
- 生物信息学和计算生物学
- 欧核生物基因调节 欧核生物基因调节
背景情况:
- RNA干扰 (RNAi) 和microRNA (miRNA) 途径利用像Argonaute和Dicer这样的必不可少的辅因子进行小RNA处理和目标识别.
- 这些小型RNA通路辅助因子在真核生物中表现出多样化的进化保护模式,反映出它们的功能重要性.
研究的目的:
- 通过比较86个不同的真核生物基因组中的基因组特征来识别参与小RNA通路的新型蛋白质.
- 将遗传学数据与转录和蛋白质组信息整合起来,以预测候选小RNA通路蛋白质.
主要方法:
- 对86个真核生物基因组进行比较基因组学分析,以确定具有与已知的小RNA辅因子相似的基因组特征的蛋白质.
- 整合了家族遗传特征分析与贝叶斯推理,转录协调和蛋白质组相互作用数据的整合.
- 通过模型生物中的RNAi沉默试验对高可信度候选蛋白质的功能验证.
主要成果:
- 确定了一大批候选小RNA通路辅因子,其中许多具有与已知的蛋白质相似的遗传学概况.
- 功能查证实,大约一半预测的小RNA辅因子对于RNAi沉默至关重要.
- 许多新发现的蛋白质与RNA拼接因子是正义的,这表明拼接和小RNA路径之间存在联系.
结论:
- 该研究成功地确定了许多参与小RNA通路的新型蛋白质,扩大了我们对基因沉默机制的理解.
- 在RNA拼接机械和小RNA介导的基因沉默之间存在显著的联系,由阿尔戈诺特蛋白质,小RNA组件和跨物种的内部存在之间的相关性支持.
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