関連する実験動画
Updated: Jul 8, 2026
09:05
MicroRNA-based Regulation of Picornavirus Tropism
Published on: February 6, 2017
Argonaute2は,RISCの活性化中にsiRNAの反誘導鎖を裂く
Tim A Rand1, Sean Petersen, Fenghe Du
1Department of Biochemistry, Howard Hughes Medical Institute, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390, USA.
Cell
|November 8, 2005
まとめ
小型の干渉RNA (siRNA) の両方の鎖は,アルゴナウト2 (Ago2) タンパク質に負荷されます. Ago2は,RNA干渉 (RNAi) 経路の活性化に不可欠な抗ガイド鎖を裂く.
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:
- RNA干渉 (RNAi) は,遺伝子サイレンスメカニズムである.
- アルゴナウト2 (Ago2) は,RNA誘発サイレンシング複合体 (RISC) のキーエンドヌクレアゼである.
- Ago2は,小さな干渉RNA (siRNA) のガイドストランドを使用して,分裂のための補完的なメッセンジャーRNA (mRNA) をターゲットにします.
研究 の 目的:
- 2つのsiRNA鎖のAgo2への負荷と運命を調査する.
- RISCの活性化における反誘導鎖の役割を決定する.
主な方法:
- ドロソフィラS2細胞抽出物を用いた生化学分析.
- Ago2.2によるsiRNA鎖の負荷と分裂の分析
主要な成果:
- ガイドとアンチガイドの両方のsiRNA鎖はAgo2にロードされます.
- 反導体鎖はAgo2によって割れ,基板として作用する.
- アンチガイドストランドの割れは,Ago2からその除去を容易にする.
結論:
- Ago2 は,siRNA ストランドの両方をロードできます.
- RISCの活性化には,アゴ2による反誘導鎖の割れが不可欠である.
- このメカニズムは,効率的なRNAi経路機能を保証します.
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...
02:30siRNA - 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...
02:57piRNA - Piwi-interacting RNAs
PIWI-interacting RNAs, or piRNAs, are the most abundant short non-coding RNAs. More than 20,000 genes have been found in humans that code for piRNAs while only 2000 genes have been found for miRNAs. piRNAs can act at the transcriptional and post-transcriptional levels and have a vital role in silencing transposable elements present in germ cells. They are also involved in epigenetic silencing and activation. Previously, they were thought to function only in germ cells but new evidence suggests...
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...
02:30Small interfering RNAs (siRNA)
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...