在酵母中使用拼接特定的微阵列对mRNA处理的全基因组分析
Tyson A Clark1, Charles W Sugnet, Manuel Ares
1Department of Molecular, Cell, and Developmental Biology, Center for Molecular Biology of RNA, Sinsheimer Laboratories, University of California, Santa Cruz, CA 95064, USA.
概括
研究人员使用微阵列绘制了酵母基因拼接图,以研究mRNA处理因子. 像Prp17p和Prp18p这样的关键因素对于去除内子,特别是短距离的内子是必不可少的.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 生物化学 生物化学
背景情况:
- 内子是真核生物基因内的非编码序列.
- 使者RNA (mRNA) 拼接删除了内子,形成成熟的mRNA.
- 在mRNA拼接过程中基因组解释的精确机制尚未完全理解.
研究的目的:
- 为了研究mRNA处理因子对拼接的全基因组影响.
- 为了确定不同mRNA处理因子之间的功能关系.
- 了解基因特异性对mRNA处理的依赖性.
主要方法:
- 开发定制的微阵列来区分拼接和未拼接的RNA.
- 在酵母中耗尽18个mRNA处理因子时,对拼接模式的全基因组分析.
- 使用基因特异性索引来计算转录和衰变速率.
- 使用定量聚合酶链反应 (qPCR) 确认阵列发现.
主要成果:
- 根据它们对RNA剪接的共同影响,确定了mRNA处理因子之间的功能关系.
- 揭示了不同的基因组,这些基因对特定的mRNA处理因子具有差异性依赖.
- 证实Prp17p和Prp18p对于移除具有短分支点至3'拼接位距离的内子至关重要.
结论:
- 这项研究提供了一个全基因组的mRNA处理因子功能在酵母拼接的图.
- 对拼接和未拼接RNA的共同影响揭示了处理因素之间的复杂的功能网络.
- 特定因子Prp17p和Prp18p在短内子的拼接中发挥着重要作用,突出了机械的洞察力.
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...
Ribosome Profiling
Ribosome profiling or ribo-sequencing is a deep sequencing technique that produces a snapshot of active translation in a cell. It selectively sequences the mRNAs protected by ribosomes to get an insight into a cell’s translation landscape at any given point in time.
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique helps...
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique helps...
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...


