マイクロRNAによって誘発されるタンパク質合成の広範な変化
Matthias Selbach1, Björn Schwanhäusser, Nadine Thierfelder
1Max Delbrück Center for Molecular Medicine, Robert-Rössle Str. 10, D-13125 Berlin, Germany. matthias.selbach@mdc-berlin.de
Nature
|August 1, 2008
まとめ
マイクロRNA (miRNA) は,mRNAレベルだけでなく,翻訳に影響を与えることで,タンパク質合成をグローバルに調節します. この研究は,miRNAsが数千の遺伝子のタンパク質生産を微調整できることを明らかにしています.
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
- プロテオミクス プロテオミクスは,プロテオミクスの
背景:
- 動物のマイクロRNA (miRNA) は,主にmRNAの分解または翻訳抑制を通じて,遺伝子発現のレギュレータとして知られています.
- miRNAsによるトランスレーション制御のゲノム全体の範囲は,ほとんど特徴づけられていないままです.
研究 の 目的:
- 新しいタンパク質学的アプローチを用いて,全ゲノム規模のタンパク質合成に対するmiRNAの影響を定量的に評価する.
- miRNAの活性,mRNA濃度,およびタンパク質の産生との関係を調査する.
主な方法:
- miRNAトランスフェクションまたはノックダウン後のタンパク質合成の変化を測定するために,プロテオミック技術を使用しました.
- mRNAレベルを同時に定量化するためにマイクロアレイを使用した.
- タンパク質合成抑制に影響を与えるmiRNA結合部位の特徴を分析した.
主要な成果:
- 単一のmiRNAは,通常は軽度の効果があるが,何百ものタンパク質の生産を抑制することができます.
- 種子配列を超えて,ヒトタンパク質合成のmiRNA媒介抑制に影響を与える特定の標的配列特性を特定しました.
- mRNAレベルに影響を与えるだけでなく,miRNAsが数百の遺伝子の翻訳を直接抑制することを実証しました.
結論:
- miRNAsは,ゲノム全体のスケールでタンパク質合成に対する重要な翻訳制御を行います.
- miRNAは,直接的・間接的メカニズムを通じて,何千もの遺伝子のタンパク質出力を調節することができます.
関連する概念動画
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01:23RNA Interference
RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
01:22MicroRNAs
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01:22MicroRNAs
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...