関連する実験動画
Updated: May 11, 2026

08:53
A Reporter Based Cellular Assay for Monitoring Splicing Efficiency
Published on: September 15, 2021
DEAD-boxタンパク質は,グループIのイントロンスプライシングにおけるATP依存RNAチャペロンとして機能する
Sabine Mohr1, John M Stryker, Alan M Lambowitz
1Institute for Cellular and Molecular Biology, Department of Chemistry and Biochemistry, Section of Molecular Genetics and Microbiology, School of Biological Sciences, University of Texas at Austin, 78712, USA.
Cell
|June 28, 2002
まとめ
新しいタンパク質であるCYT-19は,CYT-18と連携して,Neurospora crassa.のグループIイントロンをスプライスするのに役立ちます. CYT-19はRNAチャペロンとして作用し,スプライシングプロセスを支援するために難しい構造を展開します.
科学分野:
- 分子生物学は分子生物学である.
- バイオケミストリー バイオケミストリー
- 遺伝学 遺伝学とは
背景:
- Neurospora crassaのCYT-18タンパク質は,ミトコンドリアのチロシル-tRNA合成酵素で,グループIのイントロンスプライシングに不可欠です.
- CYT-18は,触媒的に活性なRNA構造の形成を誘導することにより,スプライシングを促進します.
研究 の 目的:
- グループIイントロンスプライシングに関与する新しいタンパク質を特定する.
- CYT-19がCYT-18と相互作用してスプライシングを促進するメカニズムを解明する.
主な方法:
- In vivoおよびin vitroのスプライシングアッセイが実施されました.
- RNA結合の研究は,CYT-19のイントロンRNAとの相互作用を評価するために実施されました.
- CYT-19のATP依存型RNAチャペロン活性を調べました.
主要な成果:
- DEAD-boxタンパク質であるCYT-19が特定され,CYT-18.8と機能することが示されました.
- CYT-19は,グループIのイントロンRNAに特異的に結合しません.
- CYT-19は,ATPに依存するRNAチャペロンとして作用し,RNA折り畳み経路の運動トラップを不安定化します.
結論:
- CYT-19は,CYT-18の重要なパートナーであり,グループIのイントロンスプライシングを容易にする.
- DExH/D-boxタンパク質は,天然のRNA基板の折りたたみにおいて,特定のチャペロン機能を備えている.
- この研究は,RNAベースの遺伝子調節のための新しいメカニズムを明らかにしています.
関連する概念動画
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...
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,...
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...
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...

