関連する実験動画
Updated: Jul 9, 2026
15:31
MISSION esiRNA for RNAi Screening in Mammalian Cells
Published on: May 12, 2010
RETRACTED: 二次性siRNAは,未プリムRNA合成から生じ,別々のクラスを形成する
Titia Sijen1, Florian A Steiner, Karen L Thijssen
1Hubrecht Laboratory (NIOB-KNAW), Uppsalalaan 8, 3584 CT, the Netherlands.
Science (New York, N.Y.)
|December 13, 2006
まとめ
C. elegans の二次小干渉RNA (siRNA) は,RNA指向RNAポリメラーゼ (RdRP) によって生成される. これらのsiRNAは,RdRPによって独立して生成される異なる分子であり,RNA干渉 (RNAi) で重要な役割を果たします.
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
- RNA 生物学 RNA 生物学
背景:
- C. elegansにおける効果的なRNA干渉 (RNAi) は,二次小干渉RNA (siRNA) に依存する.
- RNA指向RNAポリメラーゼ (RdRPs) は,これらの二次 siRNAs を生成するために不可欠です.
研究 の 目的:
- C. elegans.における二次性siRNAの生物発生と性質を特徴づける.
- RdRPs.による二次 siRNA 生成のメカニズムを決定する.
主な方法:
- トランスジェニックのC. elegans系から二次 siRNA のクローン化.
- 二次性 siRNA 配列の分析と,プライマリ siRNA やターゲット mRNA との関係.
- 二次性siRNAの極性,5'端の変異,アルゴナウトタンパク質との関連に関する研究.
主要な成果:
- 二次 siRNA は,プライマリ siRNA の下流から発生し,非RISC 分割 mRNA を基板として示唆しています.
- RdRPは,プリムされていないRNAの合成を行い,mRNAに補完的なヌクレオチドを組み込み,不一致を伴わない.
- 二次性 siRNA は反感覚の極性を示し,5'-di-または-triphosphates を有し,Argonauteに関連した siRNA と異なる.
結論:
- 二次性siRNAは,C. elegans. の小さなRNAのユニークなクラスを表しています.
- 彼らの生殖はRdRPに依存しており,それぞれの二次 siRNAは個々のRdRP産物である可能性が高い.
- 二次性siRNA生成の理解は,RNAiの増幅メカニズムについての洞察を提供します.
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
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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...