相关实验视频
Updated: Jul 18, 2026

10:25
Using the E1A Minigene Tool to Study mRNA Splicing Changes
Published on: April 22, 2021
概括
神经类线粒体I组内需要蛋白质因子进行拼接,与典型的自我拼接内不同. 细胞18基因对于线粒体中这种必不可少的蛋白质依赖的拼接活动至关重要.
科学领域:
- 分子生物学分子生物学
- 菌类学 菌类学是指菌类学.
- 遗传学 是一个遗传学.
背景情况:
- I组内子是可以自剪接的催化RNA.
- 神经杆菌线粒体大rRNA基因含有一组I内核,该内核在体外并非自剪接.
- 这种不自我拼接的内子的拼接所涉及的机制和因素尚未完全理解.
研究的目的:
- 为了研究神经胞线粒体大rRNA基因组I内的拼接机制.
- 为了确定这种内部的拼接所需的蛋白质因子.
- 为了确定cyt18基因在线粒体内核拼接中的作用.
主要方法:
- 使用体外转录和脱蛋白化前rRNA.RNA的分离试验.
- 分析线粒体溶解体中的拼接活动,并从RNP释放出来.
- 使用核突变细胞18-1.1的补充研究.
主要成果:
- 神经菌线粒体组I内可以通过在线粒体溶解物中存在的可溶性活性进行剪接.
- 剪接是通过瓜诺辛启动的转化机制进行的,它依赖于蛋白质来进行前rRNA折叠.
- 核突变cyt18-1在这种可溶性拼接活动中表现出缺陷,这涉及cyt18基因.
结论:
- 蛋白质因子对于神经菌线粒体大rRNA基因组I内的拼接至关重要.
- 该cyt18基因可能编码或调节蛋白质拼接活动的组成部分.
- 这项研究揭示了Neurospora中线粒体I组内的蛋白质依赖拼接途径.
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...
Riboswitches
Riboswitches are non-coding mRNA domains that regulate the transcription and translation of downstream genes without the help of proteins. Riboswitches bind directly to a metabolite and can form unique stem-loop or hairpin structures in response to the amount of the metabolite present. They have two distinct regions – a metabolite-binding aptamer and an expression platform.
The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...
The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...
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...
Ribozymes
The term ribozyme is used for RNA that can act as an enzyme. Ribozymes are mainly found in selected viruses, bacteria, plant organelles, and lower eukaryotes. Ribozymes were first discovered in 1982 when Tom Cech’s laboratory observed Group I introns acting as enzymes. This was shortly followed by the discovery of another ribozyme, Ribonulcease P, by Sid Altman’s laboratory. Both Cech and Altman received the Nobel Prize in chemistry in 1989 for their work on ribozymes.
Ribozymes can be...
Ribozymes can be...
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...

