関連する実験動画
Updated: Jun 26, 2026

10:25
Using the E1A Minigene Tool to Study mRNA Splicing Changes
Published on: April 22, 2021
エクソン突然変異は,U1 snRNAペアリングから5'スプライスサイト選択を切り離す
1Howard Hughes Medical Institute, Brandeis University, Waltham, Massachusetts 02254.
Cell
|November 2, 1990
まとめ
イーストのスプライスサイト変異は,機能的なスプライスサイトを作り,異常なmRNAの翻訳を可能にします. これは,保存されたイントロンGが,U1 snRNAのペアリングとは独立して,スプライシングに不可欠であることを示唆しています.
科学分野:
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
- RNA スプライシング
背景:
- イースト5'スプライス・ジャンクション変異 (GUAUGU) は,異常なプレ-mRNA分裂を引き起こします.
- 以前の研究では,正しい5'スプライス部位の近くで割れ目を特定しました.
研究 の 目的:
- エクソン変異が異常な割れ部位を機能的な5'スプライス部位に変換できるかどうかを調査する.
- スプライシングにおけるイントロンの5'端にある保存されたGの役割を決定する.
- U1 snRNA-pre-mRNAのペアリングとスプライス部位の選択に対するエクソン変異の影響を分析する.
主な方法:
- エクソン変異を酵母前mRNAに導入する.
- in vivoおよびin vitroのスプライシングアッセイ.
- 異常なmRNA翻訳の分析.
- U1 snRNA-pre-mRNAのペアリングの評価.
主要な成果:
- エクソン突然変異は,異常な割れ部位を機能的な5'スプライス部位に成功裏に変換しました.
- これらの変異に起因する異常なmRNAは,in vivoで翻訳された.
- イントロン5'端の保存されたGは,スプライシングの第2段階に不可欠です.
- スプライス部位の選択は,U1 snRNA-pre-mRNAのペアリングとは無関係に発生し,エクソン変異の影響を受けなかった.
結論:
- エクソン変異は,酵母における異常5'スプライス部位を機能的に救出することができます.
- 保存されたイントロニックGは,第二のスプライシングステップで重要な役割を果たします.
- 精密な5'スプライス部位選択はU1 snRNA結合とは独立しています.
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...
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...
Exon Recombination
The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes.
Exon shuffling follows “splice frame rules.” Each exon has three reading...
Exon shuffling follows “splice frame rules.” Each exon has three reading...
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...

