相关实验视频
Updated: Jun 26, 2026

10:25
Using the E1A Minigene Tool to Study mRNA Splicing Changes
Published on: April 22, 2021
异位基因突变从U1 snRNA配对中选择5'连接位
1Howard Hughes Medical Institute, Brandeis University, Waltham, Massachusetts 02254.
Cell
|November 2, 1990
概括
酵母结合部位突变可以创建功能结合部位,使异常mRNA能够被翻译. 这表明保存的内子G对于剪接至关重要,独立于U1 snRNA配对.
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分离过程中.
背景情况:
- 酵母5'拼接结突变 (GUAUGU) 导致异常的mRNA前裂变.
- 之前的研究发现了在正确的5'拼接点附近的裂纹.
研究的目的:
- 为了研究外基因突变是否可以将异常的切割部位转化为功能性的5'拼接部位.
- 为了确定在合中内子的5'端保存的G的作用.
- 分析外基因突变对U1 snRNA-pre-mRNA配对和拼接部位选择的影响.
主要方法:
- 在酵母前mRNA中引入外基因突变.
- 在体内和体外拼接试验.
- 对异常mRNA翻译的分析.
- 对U1 snRNA-pre-mRNA配对的评估.
主要成果:
- 子突变成功地将异常的裂纹部位转化为功能性5'拼接部位.
- 由这些突变产生的异常mRNA在体内被翻译.
- 在合的第二个步骤中,内部5'端的保存G是必不可少的.
- 拼接部位选择独立于U1 snRNA-pre-mRNA配对发生,而U1 snRNA-pre-mRNA配对不受外基因突变的影响.
结论:
- 外基因突变可以在酵母中功能性地拯救异常的5'拼接部位.
- 在第二个拼接步骤中,保留的内基G在第二个拼接步骤中发挥着关键作用.
- 精确的5'拼接部位选择是独立于U1 snRNA结合的.
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...
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...
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...

