相关实验视频
Updated: Jun 27, 2026

11:48
Detection of Alternative Splicing During Epithelial-Mesenchymal Transition
Published on: October 9, 2014
一个拼接增强器复杂控制双性前mRNA的替代拼接
1Harvard University, Department of Biochemistry and Molecular Biology, Cambridge, Massachusetts 02138.
Cell
|July 16, 1993
概括
变压器 (tra) 和变压器2 (tra2) 基因调节Drosophila.的雌性特异性拼接. 这些蛋白质与SR蛋白一起,形成了这个过程中必不可少的复合体.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 发展生物学 发展生物学
背景情况:
- 替代拼接对于产生蛋白质多样性至关重要.
- 德罗斯菲拉双性 (dsx) 基因的替代拼接决定了性命运.
- 变压器 (tra) 和变压器2 (tra2) 基因是已知的DSX拼接的调节者.
研究的目的:
- 阐明变压器 (tra) 和变压器2 (tra2) 调节女性特异性DSX拼接的机制.
- 确定参与DSX拼接监管复合体形成的拼接因素.
主要方法:
- 蛋白质复合体与dsx前mRNA结合的亲和性净化.
- 纯化复合体内蛋白质成分的生物化学分析.
- 在体外拼接试验以评估拼接因子的充分性.
主要成果:
- Tra和Tra2将一般的拼接因子,包括富含氨酸/氨酸 (SR) 的蛋白质,招募到下游的监管元素中.
- Tra,Tra2 和 SR 蛋白质足以将 dsx 前mRNA 进行女性特异性剪接.
- 观察到SR蛋白在形成承诺复合物的不同能力.
结论:
- Tra,Tra2 和 SR 蛋白质构成了女性特异性 dsx 前mRNA 拼接的必不可少的拼接增强复合物.
- 这种复合体通过调节替代拼接,在性发育中起着至关重要的作用.
- 这些发现提供了通过拼接对基因表达的复杂调节的见解.
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...
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...
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...
Pre-mRNA Processing: 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...

