相关实验视频
Updated: Jun 25, 2025

10:25
Using the E1A Minigene Tool to Study mRNA Splicing Changes
Published on: April 22, 2021
4.9K
解析DExD盒蛋白DDX39A和DDX39B在替代RNA剪接中的作用
Shefali Banerjee1,2, Chloe K Nagasawa1,2,3, Steven G Widen2
1Department of Microbiology, Immunology and Cancer Biology, University of Virginia, Charlottesville, VA 22903, USA.
Nucleic acids research
|May 27, 2024
概括
DExD盒RNA螺旋酶DDX39A和DDX39B在RNA拼接中显示功能冗余,但DDX39B由于上游序列元素,独特地调节特定的免疫基因拼接,特别是IL7R外子6.
科学领域:
- 分子生物学分子生物学
- 在RNA生物学,RNA生物学.
- 基因规则 基因规则
背景情况:
- DExD盒RNA螺旋酶DDX39A和DDX39B是对RNA处理至关重要的同源蛋白质.
- 它们在RNA核出口中的重叠功能已知,但它们在RNA拼接中的特定作用尚不清楚.
- 之前的研究确定了DDX39B在拼接免疫转录IL7R和FOXP3.3中的作用.
研究的目的:
- 调查DDX39A是否与其对应物DDX39B.类似地调节替代RNA剪接.
- 在mRNA前拼接中识别DDX39A和DDX39B的特定和冗余功能.
主要方法:
- 在RNA剪接中对DDX39A和DDX39B功能的比较分析.
- 研究特定序列元素在差异基因标调控中的作用.
- 评估DDX39A的拯救DDX39B-depleted拼接缺陷的能力.
主要成果:
- DDX39A和DDX39B在基因标中表现出显著的冗余性,但也具有独特的标.
- 在DDX39B耗尽后,DDX39A无法挽救IL7R外子6的拼接缺陷.
- 特定的DDX39B依赖性前列子,包括IL7R前列子6,具有U贫/C丰富的多胺基通道,这对DDX39B依赖性至关重要.
结论:
- 尽管具有很高的功能重叠,但DDX39A和DDX39B被选择性地要求用于拼接不同的前mRNA.
- 内子中的独特序列元素决定了在某些拼接事件中对DDX39B的特定要求.
相关概念视频
Alternative RNA Splicing
21.1K
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...
21.1K
RNA Splicing
56.3K
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...
56.3K
Chromatin Structure Regulates pre-mRNA Processing
7.0K
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...
7.0K
Pre-mRNA Processing: RNA Splicing
5.2K
5.2K
Exon Recombination
3.6K
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...
Exon shuffling follows “splice frame rules.” Each exon...
3.6K
Chromatin Structure and RNA Splicing
2.7K
2.7K

