相关实验视频
Updated: Jun 8, 2026

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Using the E1A Minigene Tool to Study mRNA Splicing Changes
Published on: April 22, 2021
子结合复合体控制着MAPK和其他长内含有的转录在Drosophila中的剪接
Dariel Ashton-Beaucage1, Christian M Udell, Hugo Lavoie
1Institute for Research in Immunology and Cancer, Laboratory of Intracellular Signaling, Université de Montréal, C.P. 6128, Succursale Centre-Ville, Montreal, Quebec, H3C 3J7, Canada.
Cell
|October 16, 2010
概括
极子结合综合体 (EJC) 通过控制特定转录的拼接来调节基因表达,包括MAPK. 这一发现揭示了EJC在RAS/MAPK信号通路中的新角色.
科学领域:
- 分子生物学分子生物学
- 细胞信号传递 细胞信号传递
- 在RNA生物学,RNA生物学.
背景情况:
- 信号通路依赖于翻译后修改,但对核心组件的监管机制不太了解.
- 众所周知,外因子结合综合体 (EJC) 结合mRNA外因子-外因子结合点,并参与后拼接事件.
研究的目的:
- 确定调节信号通路中核心组件表达的因素.
- 调查埃克森交汇综合体 (EJC) 在RAS/MAPK信号传输中的作用.
主要方法:
- 在Drosophila中进行了RNA干扰 (RNAi) 选,以确定调节RAS/MAPK信号的因素.
- 在没有EJC的细胞上进行了全转录组和RT-PCR分析.
主要成果:
- 确定了埃克森结合综合体 (EJC) 作为RAS/MAPK通路中的关键调节器.
- 证明EJC对于MAPK转录的正确拼接至关重要,可能是通过外型定义.
- 揭示了包括MAPK在内的长内子含有基因的拼接对EJC活动敏感.
结论:
- 埃克森结合复合体 (EJC) 在调节转录子集的拼接方面发挥着新的作用.
- 欧洲司法委员会对MAPK水平的监管影响了RAS/MAPK信号,突出了新的路径控制层.
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...
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...
Exon Recombination
The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes.
Exon shuffling follows “splice frame rules.” Each exon has three reading...
Exon shuffling follows “splice frame rules.” Each exon has three reading...
Chromatin Structure Regulates pre-mRNA Processing
In eukaryotic cells, nascent mRNA transcripts need to undergo many post-transcriptional modifications to reach the cell cytoplasm and translate into functional proteins. For a long time, transcription and pre-mRNA processing were considered two independent events that occur sequentially in the cell. However, it has now been well established that transcription and pre-mRNA processing are two simultaneous processes that are precisely regulated inside the cell.
The chromatin structure, especially...
The chromatin structure, especially...
