関連する実験動画
Updated: Jun 6, 2026

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Visualization of Endoplasmic Reticulum Localized mRNAs in Mammalian Cells
Published on: December 17, 2012
mRNAのローカライゼーションのグローバル分析は,細胞の構造と機能を組織する上で重要な役割を果たしていることを示しています
Eric Lécuyer1, Hideki Yoshida, Neela Parthasarathy
1Banting and Best Department of Medical Research, University of Toronto, Toronto, Canada.
Cell
|October 10, 2007
まとめ
ほとんどのタンパク質の局所化は翻訳後に起こりますが,この研究では,発現する遺伝子の71%が初期開発中に局所化されたメッセンジャーRNA (mRNA) があることが明らかになりました. この発見は,mRNAの局所化を強調しています.
科学分野:
- 発達生物学 発達生物学について
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
背景:
- タンパク質の局所化は,細胞の機能にとって極めて重要です.
- サブセルラーメッセンジャーRNA (mRNA) トラフィキングは,タンパク質分布の既知のメカニズムである.
- ほとんどのタンパク質の局所化は,翻訳後に起こると広く信じられています.
研究 の 目的:
- 初期のドロソフィラの胚形成過程におけるmRNAの局所化ダイナミクスを包括的に評価する.
- タンパク質の局所化は主に翻訳後に起こるという支配的な考え方に異議を唱えるために.
主な方法:
- 高解像度の光 in situ ハイブリダイゼーション (FISH) プロセスの開発と応用.
- 初期のドロソフィラの胚形成における3370の遺伝子のmRNA局所化の分析.
主要な成果:
- 驚くべきことに,分析された発現遺伝子の71%は,細胞下局所化されたmRNAをコードしている.
- 何十もの新しい独特のmRNAの局所化パターンが特定されました.
- mRNAの分布と,その後のタンパク質の局所化と機能との間に強い相関が観察されました.
結論:
- mRNAの局所化は,局所化された細胞機構を確立する上で重要な役割を果たします.
- この発見は,これまで考えられていたよりも,mRNAの局所化メカニズムがより多様であることを示唆している.
- mRNAダイナミクスに関する新しい検索可能なウェブリソースは,局所化メカニズムを解剖し,遺伝子機能を予測するのに役立ちます.
関連する概念動画
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...
Regulation of Expression Occurs at Multiple Steps
Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
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...
Ribosome Profiling
Ribosome profiling or ribo-sequencing is a deep sequencing technique that produces a snapshot of active translation in a cell. It selectively sequences the mRNAs protected by ribosomes to get an insight into a cell’s translation landscape at any given point in time.
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique helps...
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique helps...
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...
Regulation of Expression at Multiple Steps
The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the addition of a...

