相关实验视频
Updated: Jul 5, 2026

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Use of Alu Element Containing Minigenes to Analyze Circular RNAs
Published on: March 10, 2020
通过RNA编辑来规范替代拼接
S M Rueter1, T R Dawson, R B Emeson
1Department of Pharmacology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232-6600, USA.
Nature
|May 20, 1999
概括
酶ADAR2通过编辑其前mRNA来调节自身的表达. 这种RNA编辑过程控制了替代拼接,影响了信使RNA的产生.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 在RNA生物学,RNA生物学.
背景情况:
- 在哺乳动物的RNA编辑中,ADAR2 (作用于RNA2的腺氨酸脱氨酶) 是至关重要的.
- 在信使RNA中,RNA编辑将腺转化为因素.
- 替代拼接可以从单个基因生成多样化的mRNA转录.
研究的目的:
- 研究ADAR2在调节自身基因表达中的作用.
- 在大鼠ADAR2 mRNA中识别替代拼接事件.
- 探索RNA编辑和替代拼接之间的相互作用.
主要方法:
- 对ADAR2基因组DNA的核酸序列分析.
- 在ADAR2 mRNA中识别替代拼接变体.
- 在ADAR2前mRNA.RNA中分析RNA编辑事件.
主要成果:
- 在大鼠ADAR2mRNA中发现了两个不同的替代拼接事件.
- 一个近距离的3'拼接受体位点的使用导致了47核酸插入.
- ADAR2编辑自己的前mRNA,将内基AA转换为AI,模仿AG拼接站点.
结论:
- 通过ADAR2编辑RNA直接调节其自己的前mRNA的替代拼接.
- 这种机制允许ADAR2调节自己的表达水平.
- ADAR2采用了一种新的自我调节策略,涉及RNA编辑和拼接.
相关概念视频
RNA Splicing
Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
RNA Splicing
Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
Alternative RNA Splicing
Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
RNA Editing
RNA editing is a post-transcriptional modification where a precursor mRNA (pre-mRNA) nucleotide sequence is changed by base insertion, deletion, or modification. The extent of RNA editing varies from a few hundred bases, in mitochondrial DNA of trypanosomes, to a just single base, in nuclear genes of mammals. Even a single base change in the pre-mRNA can convert a codon for one amino acid into the codon for another amino acid or a stop codon. This type of re-coding can significantly affect the...
RNA-seq
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 microarray-based...
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while microarray-based...
Alternative RNA Splicing
Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...

