関連する実験動画
Updated: Jul 6, 2026

08:53
A Reporter Based Cellular Assay for Monitoring Splicing Efficiency
Published on: September 15, 2021
アクティブステップIのスピライソソームの分離と,そのRNPコアの構成
Sergey Bessonov1, Maria Anokhina, Cindy L Will
1Department of Cellular Biochemistry, Max Planck Institute of Biophysical Chemistry, D-37077 Göttingen, Germany.
Nature
|March 7, 2008
まとめ
人間のスプライセソームは,追加のタンパク質なしでRNAスプライシングを触媒化することができます. Prp19-CDC5のような重要なタンパク質は,触媒部位を安定させ,スプライセソームを明らかにします.
科学分野:
- 分子生物学は分子生物学である.
- RNA 生物学 RNA 生物学
- バイオケミストリー バイオケミストリー
背景:
- タンパク質の補助は,スプライセソーム内の触媒的に活性なRNA構造の形成に不可欠です.
- スプライセソームの活性部位に必要な正確なタンパク質の組成は,ほとんど不明のままである.
研究 の 目的:
- スプライソームの触媒活性に対するタンパク質の必要性を調査する.
- スプライセソームの活性部位の形成と維持に不可欠なタンパク質を特定する.
主な方法:
- 人間のスプライソームC複合体のアフィニティ浄化.
- スプライソーム活性化 (BからC複合体への移行) 中のタンパク質組成の変化の分析.
- 精製されたC複合体の破壊により,核リボ核タンパク質 (RNP) 構造を分離する.
主要な成果:
- 精製されたヒトスプレイスソーマC複合体は,独立して触媒的エクソンリガーション活性を示した.
- タンパク質の重要な交換はBからC複合体の移行中に発生し,Prp19-CDC5複合体のタンパク質を安定させ,SF3a/bタンパク質を不安定化させた.
- スプライシング中間物質,U2,U5,U6の小さな核RNA,U5とPrp19-CDC5のタンパク質を含む塩で安定したRNPコアを分離した.
結論:
- スプライソームには,内在の触媒RNPドメインがあります.
- Prp19-CDC5タンパク質および関連する要因は,スプライソームの触媒的に活性な構造を維持する上で中心的な役割を果たします.
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...
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...
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...
Ribosomal RNA Synthesis
Ribosome synthesis is a highly complex and coordinated process involving more than 200 assembly factors. The synthesis and processing of ribosomal components occurs not only in the nucleolus but also in the nucleoplasm and the cytoplasm of eukaryotic cells.
Ribosome biogenesis begins with the synthesis of 5S and 45S pre-rRNAs by distinct RNA polymerases. The primary transcripts are extensively processed and modified before they are bound and folded by ribosomal proteins and assembly factors,...
Ribosome biogenesis begins with the synthesis of 5S and 45S pre-rRNAs by distinct RNA polymerases. The primary transcripts are extensively processed and modified before they are bound and folded by ribosomal proteins and assembly factors,...

