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Updated: May 11, 2026

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Detection of Alternative Splicing During Epithelial-Mesenchymal Transition
Published on: October 9, 2014
5' スプライスサイト競争を調節するサイレンサーによる代替スプライシングのダイナミックな調節
Yang Yu1, Patricia A Maroney, John A Denker
1Center for RNA Molecular Biology, Case Western Reserve University, Cleveland, OH 44106, USA.
Cell
|December 27, 2008
まとめ
研究者らは,特定のスプライスサイトを静音化することによって,代替スプライシングを制御する新しいシーケンスのモチーフを特定しました. これらの発見は,遺伝子発現の調節とタンパク質の多様性についての理解を深める.
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
- バイオケミストリー バイオケミストリー
背景:
- 代替スプライシングは,エウカリオットのタンパク質の多様性を大幅に拡大し, ~70%の遺伝子が複数の同型を生成します.
- スプライス部位の選択を左右する正確な分子機構は,依然としてほとんど解明されていない.
研究 の 目的:
- 下流のスプライスサイトを静音化することによって,スプライスサイトの選択を制御できるシーケンスの要素を特定する.
- スプライスサイトサイレンシングのインビトロおよびインビボメカニズムを調査する.
主な方法:
- 配列要素を発見するために in vitro のランダム化-選択アプローチを使用した.
- 特定されたモチーフを,近隣の強い5'スプライスサイトを静止する能力のためにテストしました.
- 検証された in vivo の発見と,静音化の生化学的基礎を調査した.
主要な成果:
- 6つの新しいシーケンスのモチーフ (2つのエクソニック,4つのイントロニック) を特定し,近隣の5'スプライスサイトを効果的に沈黙させました.
- サイレンシング活動は,競合する上流のスプライスサイトの存在に依存していた.
- 生物化学的分析によると,モチーフはU1 snRNP/5' スプライスサイト複合体の形成に干渉し,スプライスサイトのペアリングを損なうことを示唆しています.
結論:
- スプライスサイト選択を調節することによって,代替スプライシングのレギュレータとして作用するシーケンスのモチーフを発見した.
- スプライシングの速度を制限しないステップの混乱が,スプライスサイト選択に大きく影響することを実証した.
- 遺伝子発現とタンパク質の多様性を制御するメカニズムに関する新しい洞察を提供します.
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...
Chromatin Structure Regulates pre-mRNA Processing
In eukaryotic cells, nascent mRNA transcripts need to undergo many post-transcriptional modifications to reach the cell cytoplasm and translate into functional proteins. For a long time, transcription and pre-mRNA processing were considered two independent events that occur sequentially in the cell. However, it has now been well established that transcription and pre-mRNA processing are two simultaneous processes that are precisely regulated inside the cell.
The chromatin structure, especially...
The chromatin structure, especially...
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...
What is Gene Expression?
A gene is a stretch of DNA that serves as the blueprint for functional RNAs and proteins. Since DNA is comprised of nucleotides and proteins are comprised of amino acids, a mediator is required to convert the information encoded in DNA into proteins. This mediator is the messenger RNA (mRNA). mRNA copies the blueprint from DNA by a process called transcription. In eukaryotes, transcription occurs in the nucleus by complementary base-pairing with the DNA template. The mRNA is then processed and...
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...

