定量CRACI揭示了RNA二氨酸在基底分辨率上的转录组范围的分布
Cheng-Wei Ju1,2,3, Han Li1,2, Bochen Jiang1,2,4
1Department of Chemistry, The University of Chicago, Chicago, IL, USA.
Nature communications
|October 6, 2025
概括
氨酸 (D) 是一种常见的RNA修饰物. 一种新的方法,CRACI,绘制了tRNA中的D位点,并揭示了它在线粒体中的作用及其对tRNA稳定性的影响.
科学领域:
- 分子生物学分子生物学
- 基因组学就是基因组学.
- 生物化学 生物化学
背景情况:
- 氨酸 (D) 是一种普遍存在的RNA修饰物,但其在哺乳动物中的生物功能在很大程度上是未知的.
- 目前的检测方法缺乏对D位点和tRNA中的石化学进行全面分析的灵敏度和分辨率.
研究的目的:
- 开发一种高度敏感和定量方法,以单基分辨率绘制二氨酸的地图.
- 在哺乳动物和植物tRNA中生成D的全转录组图,并研究其作用.
主要方法:
- 化学还原辅助细胞因子结合测序 (CRACI) 已开发用于敏感和定量地图的D.
- 在哺乳动物和植物中,CRACI被应用于在细胞质和线粒体tRNA中对D修饰的概况.
- 此外,CRACI还用于分析人类mRNA中的D变异.
主要成果:
- CRACI成功地绘制了细胞质和线粒体tRNA中的D位点,揭示了新的线粒体D位点.
- DUS2L被确定为负责人类线粒体tRNAs中二氨基氨酸修饰的酶.
- 大多数D修改对tRNA稳定性的影响很小,除了D20a,它也调节了相邻的D20位点.
- 发现二瑞丁修饰是罕见的,并且在人类mRNA中存在低静态度.
结论:
- CRACI是一个强大的新平台,用于研究二氨酸的生物学和分布在各种物种.
- 这项研究提供了哺乳动物和植物tRNA中D的第一个全面地图,揭示了它的线粒体角色和调节功能.
相关概念视频
03:21RNA-seq
11.7K
RNA sequencing, or RNA-Seq, is a high-throughput sequencing technology used to study the transcriptome of a cell. Transcriptomics helps to interpret the functional elements of a genome and identify the molecular constituents of an organism. Additionally, it also helps in understanding the development of an organism and the occurrence of diseases.
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while...
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while...
11.7K
02:24Ribosome Profiling
4.1K
Ribosome profiling or ribo-sequencing is a deep sequencing technique that produces a snapshot of active translation in a cell. It selectively sequences the mRNAs protected by ribosomes to get an insight into a cell’s translation landscape at any given point in time.
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique...
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique...
4.1K