相关实验视频
Updated: Jun 26, 2025

10:25
Using the E1A Minigene Tool to Study mRNA Splicing Changes
Published on: April 22, 2021
4.9K
一个可解释的模型,用于动物和植物基因的mRNA前拼接
Kayla McCue1,2, Christopher B Burge1,2
1Computational and Systems Biology PhD Program, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
Science advances
|May 8, 2024
概括
SMsplice通过整合拼接地点动图,监管元素和长度偏好,准确地预测各种物种的拼接地点. 这种模型揭示了保存和特定物种的拼接机制,突出了基因表达调节的进化差异.
科学领域:
- 分子生物学分子生物学
- 基因组学就是基因组学.
- 计算生物学 计算生物学
背景情况:
- 前传递 RNA (前mRNA) 拼接对于真核生物的基因表达至关重要.
- 拼接体识别了拼接部位 (SSs),并受到与拼接调节元件 (SREs) 结合的拼接因子 (SFs) 的影响.
研究的目的:
- 开发SMsplice,用于mRNA前拼接的可解释模型.
- 整合SS图案,SRE和长度偏好的模型,以准确地预测拼接.
主要方法:
- 开发了SMsplice,这是一个结合核心SS动机,SRE和外声/内声长度偏好的计算模型.
- 在包括鱼类,昆虫,植物和哺乳动物在内的多种物种上训练并验证了模型.
- 进行基因分析以支持学习的SRE动机.
主要成果:
- 在预测鱼类,昆虫和植物中的SS位置时,获得了83-86%的准确性,在哺乳动物中达到70%.
- 确定了已知的和新的SRE动机,对这两种动机都有遗传支持.
- 在非哺乳动物中观察到保存的拼接机制,在植物中增加了内部SRE依赖,在哺乳动物中增加了SRE利用.
结论:
- SMsplice为了解mRNA前拼接提供了一个可解释的框架.
- 跨物种的比较揭示了剪接调节中的进化适应.
- 该模型提升了我们对SRE和序列特征如何影响拼接地点选择的理解.
相关概念视频
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
Pre-mRNA Processing: RNA Splicing
5.2K
5.2K
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
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: Modification of pre-mRNA Ends
9.3K
In eukaryotic cells, transcripts made by RNA polymerase are modified and processed before exiting the nucleus. Unprocessed RNA is called precursor mRNA or pre-mRNA to distinguish it from mature mRNA.
Once about 20-40 ribonucleotides have been joined together by RNA polymerase, a group of enzymes adds a cap to the 5' end of the growing transcript. In this process, a 5' phosphate is replaced by modified guanosine that has a methyl group attached (7-methyl guanosine). This 5' cap helps...
Once about 20-40 ribonucleotides have been joined together by RNA polymerase, a group of enzymes adds a cap to the 5' end of the growing transcript. In this process, a 5' phosphate is replaced by modified guanosine that has a methyl group attached (7-methyl guanosine). This 5' cap helps...
9.3K
pre-mRNA Processing
52.9K
In eukaryotic cells, transcripts made by RNA polymerase are modified and processed before exiting the nucleus. Unprocessed RNA is called precursor mRNA or pre-mRNA to distinguish it from mature mRNA.
Once about 20-40 ribonucleotides have been joined together by RNA polymerase, a group of enzymes adds a “cap” to the 5’ end of the growing transcript. In this process, a 5’ phosphate is replaced by modified guanosine that has a methyl group attached to it (7-Methyl...
Once about 20-40 ribonucleotides have been joined together by RNA polymerase, a group of enzymes adds a “cap” to the 5’ end of the growing transcript. In this process, a 5’ phosphate is replaced by modified guanosine that has a methyl group attached to it (7-Methyl...
52.9K

