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RNAの干渉による分子機構の3次元図
Martin Jinek1, Jennifer A Doudna
1Department of Molecular and Cell Biology, University of California, Berkeley, California 94720, USA.
Nature
|January 23, 2009
まとめ
小型RNAは,ディッサータンパク質とアルゴナウトタンパク質を通じて,真核生物の遺伝子発現を調節する. 構造的な洞察は,細胞プロセスとゲノム防御に不可欠なRNAサイレンシングのメカニズムを明らかにします.
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
- バイオケミストリー バイオケミストリー
背景:
- 小型の非コーディングRNAは,真核生物における遺伝子発現の重要な調節因子である.
- これらのRNAは,細胞の代謝,成長,分化,ゲノムの整合性,ウイルスや移動要素に対する防御を制御する.
- 特殊なリボヌクレアゼ,DicerとArgonauteタンパク質は,小さなRNA経路の重要な役割を果たしています.
研究 の 目的:
- RNAサイレンシング経路の基礎にある分子メカニズムを解明する.
- 小型RNAの生物発生と機能におけるディサーとアルゴナウトタンパク質の役割を理解する.
- DicerとArgonauteのタンパク質の構造的な洞察を提供するために,自由であり,小さなRNAに結合しています.
主な方法:
- ディサータンパク質とアルゴナウトタンパク質の分子構造の分析.
- 自由状態と小さなRNA結合状態の両方のタンパク質の調査.
- RNAサイレンシング経路の生化学および遺伝学的研究.
主要な成果:
- Dicerは,二重鎖RNA前駆体を小さな干渉RNAとマイクロRNAに分割する.
- アルゴナウトタンパク質は小さなRNAを結合し,配列特異的なメッセンジャーRNAサイレンシングを誘導する.
- 静止はmRNAの割れ方や翻訳抑制によって起こります.
- 構造データは,RNAサイレンシングの分子基礎についての洞察を提供します.
結論:
- DicerとArgonauteのタンパク質は,小さなRNAによる真核生物の遺伝子調節の中心に位置しています.
- これらのタンパク質の構造の研究は,RNAサイレンシングメカニズムの重要な理解を提供します.
- これらの経路は,細胞ホメオスタシスとゲノム防御の維持に不可欠です.
関連する概念動画
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...
01:23RNA 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...
02:15Experimental RNAi
RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...
02:30siRNA - Small Interfering RNAs
Small interfering RNAs, or siRNAs, are short regulatory RNA molecules that can silence genes post-transcriptionally, as well as the transcriptional level in some cases. siRNAs are important for protecting cells against viral infections and silencing transposable genetic elements.
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the ATP-dependent...
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the ATP-dependent...
01:20Types of RNA
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in regulating gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA Performs Diverse...
RNA Performs Diverse...
01:23Types of RNA
Overview
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...