関連する実験動画
Updated: Jul 7, 2026
15:31
MISSION esiRNA for RNAi Screening in Mammalian Cells
Published on: May 12, 2010
ATPの要求とRNA干渉経路における小さな干渉RNA構造
A Nykänen1, B Haley, P D Zamore
1Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, 55 Lake Avenue North, Worcester, MA 01655, USA.
Cell
|November 10, 2001
まとめ
アデノシン三リン酸 (ATP) は,siRNAの処理と活性化を含むRNA干渉 (RNAi) の重要なステップを駆動します. これにより,5'リン酸塩が直接標的RNAを破壊する本物の小干渉RNA (siRNA) のみ確保されます.
科学分野:
- 分子生物学は分子生物学である.
- バイオケミストリー バイオケミストリー
- 遺伝子規制 遺伝子規制
背景:
- RNA干渉 (RNAi) は,重要な遺伝子サイレンスメカニズムである.
- RNAiの正確な分子ステップとエネルギー要求は完全に解明されていません.
研究 の 目的:
- RNA干渉 (RNAi) 経路におけるアデノシン三リン酸 (ATP) の役割を調査する.
- RNAi媒介による遺伝子サイレンシングに関与する連続的なステップを定義する.
主な方法:
- RNAの処理と複合体の形成を分析するための生化学的測定法.
- 特定のステップのATP依存性を決定する酵素運動.
- 標的の認識を評価するためのRNA分裂アッセイ.
主要な成果:
- RNAi経路における2つの重要なATP依存のステップを特定した.
- 二重鎖RNAのATP依存処理を小干渉RNA (siRNA) にしていることが実証されている.
- アクティベーションのためのsiRNA複合体のATP依存的な解き放たれとsiRNAの5'-リン酸塩の維持におけるATPの役割が明らかになった.
結論:
- RNAiには少なくとも4つの連続したステップがあり,重要な処理とアクティベーションの段階にはATPが必要です.
- siRNAの5'-リン酸は,品質管理メカニズムとして作用し,本物のsiRNAのみが標的RNA破壊を媒介することを保証します.
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...
02:15Experimental 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...
01:25Nucleic Acid Structure
The pentose sugar in DNA is deoxyribose, while in RNA the pentose sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the ribose's second carbon and a hydrogen on the deoxyribose's second carbon. The phosphate residue attaches to the hydroxyl group of the 5′ carbon of one sugar and the hydroxyl group of the 3′ carbon of the sugar of the next nucleotide, which forms a 5′ to 3′ phosphodiester linkage.
DNA Structure
DNA has a double-helix structure. The...
DNA Structure
DNA has a double-helix structure. The...