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A Reporter Based Cellular Assay for Monitoring Splicing Efficiency
Published on: September 15, 2021
転写的に結合されたおよび結合されていないスプライシングの単分子イメージング
Diana Y Vargas1, Khyati Shah, Mona Batish
1Public Health Research Institute, New Jersey Medical School, University of Medicine and Dentistry of New Jersey, Newark, NJ 07103, USA.
Cell
|November 29, 2011
まとめ
研究者らは,細胞内のRNAスプライシングを観察するための新しいイメージング方法を開発しました. 彼らは,スペライシングが転写から遅れる可能性があることを発見しました,特にイントロンが複雑な構造を持つとき,または特定のタンパク質を含む代替スペライシングイベントの間に.
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
- 細胞生物学 細胞生物学
背景:
- イントロン除去 (スプライシング) は,通常,遺伝子転写中に発生します.
- 代替スプライシングは正確な時間制御を必要とし,時にはスプライシングを遅らせることが必要になります.
- スプライシングの空間的および時間的調節を理解することは,遺伝子発現にとって極めて重要です.
研究 の 目的:
- 高感度 in situ RNA 画像技術を開発し,適用する.
- プレ-mRNAスプライシングの細胞内局所化とタイミングを調査する.
- 副次構造と調節タンパク質が転写とスプライシングの結合にどのように影響するか調べる.
主な方法:
- 単一分子に敏感なインシットRNA画像法の開発.
- 生体細胞内のスプライシングイベントの観察.
- イントロンの二次構造とRNA結合タンパク質 (Sxl, PTB) の役割の分析.
主要な成果:
- トランスクリプションとスプライシングの間の緊密な結合が破壊される可能性があります.
- イントロン二次構造は,ポリピリミジン経路を隔離し,スプライシングを遅らせることができます.
- Sxl と PTB を含む代替スプライシングイベントは,特定のイントロンの転写からスプライシングの分離につながります.
- 前後のイントロンは,混乱したイントロンが遅れた場合でも,コトランスクリプションでスプレイスされます.
結論:
- スプライシングは,特に特定の規制条件下では,常にトランスクリプションと緊密に結びついているわけではありません.
- スプライシングの空間と時間のダイナミクスは,これまで考えられていたよりも柔軟です.
- この柔軟性は,代替スプライシングと遺伝子発現の調節に不可欠です.
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 and RNA Splicing
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...
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...

