核内のオスカーRNAのスプライシングは,その細胞質の局所化と結合しています
Olivier Hachet1, Anne Ephrussi
1European Molecular Biology Laboratory, Meyerhofstrasse 1, Postfach 10.2209, D-69117 Heidelberg, Germany.
Nature
|May 1, 2004
まとめ
オスカーメッセンジャーRNA (mRNA) の最初のエクソン-エクソン交差点でのスプライシングは,ドロソフィラ卵細胞における後部局所化にとって極めて重要です. この発見は,発達の過程でmRNAの局所化を調節するスプライシングの新たな役割を明らかにしています.
科学分野:
- 発達生物学 発達生物学とは
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
背景:
- ドロソフィラ卵細胞の裏極へのmRNAの局所化は,胚の発達に不可欠である.
- 人間のエクソン-エクソン結合複合体 (EJC) のコンポーネントの同型である核シャトルタンパク質Y14/TsunagiとMago nashiは,この局所化のために必要である.
研究 の 目的:
- オスカー・mRNAの局所化におけるスプライシングの役割を調査する.
- オスカー3'未翻訳領域 (3'UTR) だけで後部局在化に十分であるという既成の見解に異議を唱えるため.
主な方法:
- 後部局所化のためのオスカーRNAの最初のエクソン-エクソン交差点でのスプライシングの必要性を調査した.
- 関連のないトランスクリプトの局所化を調べることで,後部局所化のためのオスカール3'UTRの十分性を再評価した.
主要な成果:
- オスカーRNAの最初のエクソン-エクソン交差点でのスプライシングは,その後部局所化に不可欠です.
- オスカー3'UTRを含むトランスクリプトの局所化は,3'UTR配列のみに依存するのではなく,内生的なオスカーmRNAに依存しています.
結論:
- スプライシングは,mRNAの局所化を調節する上で,これまで認識されていない重要な役割を果たしています.
- スプライシングは,サイトプラズミックmRNAの局所化のためのメッセンジャーリボ核タンパク質複合体の組み立てと組織に不可欠です.
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...
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...
Regulated mRNA Transport
In eukaryotes, transcription and translation are compartmentalized; an mRNA is first synthesized in the nucleus and then selectively transported to the cytoplasm for protein synthesis. Before transport, a pre-mRNA undergoes several steps of post-transcriptional modifications including splicing, 5' capping, and the addition of a poly-adenine tail. Various proteins bind to the pre-mRNA during these modifications. The mRNA transport takes place with the help of multiple proteins playing specific...
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...
Regulated mRNA Transport
In eukaryotes, transcription and translation are compartmentalized; an mRNA is first synthesized in the nucleus and then selectively transported to the cytoplasm for protein synthesis. Before transport, a pre-mRNA undergoes several steps of post-transcriptional modifications including splicing, 5' capping, and the addition of a poly-adenine tail. Various proteins bind to the pre-mRNA during these modifications. The mRNA transport takes place with the help of multiple proteins playing specific...


