相关实验视频
Updated: Jun 3, 2026

08:53
A Reporter Based Cellular Assay for Monitoring Splicing Efficiency
Published on: September 15, 2021
发育障碍MOPD I发育障碍中U4atac snRNA,小结合体的一个组成部分的突变
Huiling He1, Sandya Liyanarachchi, Keiko Akagi
1Human Cancer Genetics Program, Ohio State University, Columbus, OH 43210, USA.
概括
在U4atac小核RNA (snRNA) 中的突变会导致小脑骨质疏松性原始矮体I型 (MOPD I). 这凸显了微型内子拼接在人类发展中的关键作用.
科学领域:
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
- 发展生物学 发展生物学
背景情况:
- 小核RNAs (snRNAs) 对于信使RNA (mRNA) 拼接至关重要.
- 依赖U12的拼接体利用U4atac snRNA进行特定的拼接事件.
研究的目的:
- 调查小脑骨质疏松性原始矮症I型 (MOPD I) 的遗传基础.
- 确定U4atac snRNA在MOPD I病原发生中的作用.
主要方法:
- 用同卵性映射和深度测序来识别致病基因.
- 进行了功能性测试,以评估患者衍生细胞中的拼接缺陷.
主要成果:
- 在MOPD I患者中发现了U4atac snRNA基因的突变.
- 这些突变导致了缺陷的U12依赖拼接,影响了轻微的内核处理.
- 恢复野生类型的U4atac snRNA改善了患者细胞中的U12依赖拼接.
结论:
- U4atac snRNA突变是MOPD I的原因,这是一个严重的发育障碍.
- 由于受损的U4atac snRNA功能导致的缺陷的轻微内子拼接是MOPD I的核心.
- 这项研究强调了微型内子拼接在人类发展中的重要作用.
相关概念视频
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...
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...
Nonsense-mediated mRNA Decay
The Upf proteins that carry out nonsense-mediated decay (NMD) are found in all eukaryotic organisms, including humans. Each protein has an individual role, but they need to work in collaboration. Upf1 is an ATP-dependent RNA helicase that unwinds the RNA helix. Because Upf1 can unwind any RNA, Upf2 and Upf3 are required to help Upf1 discriminate between nonsense and normal mRNAs.
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
Nonsense-mediated mRNA Decay
The Upf proteins that carry out nonsense-mediated decay (NMD) are found in all eukaryotic organisms, including humans. Each protein has an individual role, but they need to work in collaboration. Upf1 is an ATP-dependent RNA helicase that unwinds the RNA helix. Because Upf1 can unwind any RNA, Upf2 and Upf3 are required to help Upf1 discriminate between nonsense and normal mRNAs.
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
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...

