関連する実験動画
Updated: Jul 8, 2026
07:56
Bacterial Delivery of RNAi Effectors: Transkingdom RNAi
Published on: August 18, 2010
RNAiエフェクター複合体におけるマイクロコックスのヌクレアースの同類である
Amy A Caudy1, René F Ketting, Scott M Hammond
1Cold Spring Harbor Laboratory, Watson School of Biological Sciences, 1 Bungtown Road, Cold Spring Harbor, New York 11724, USA.
Nature
|September 26, 2003
まとめ
Tudor-SNタンパク質は,種間のRNA誘発静止複合体 (RISC) の重要な構成要素である. この発見は,RISC内の新しいヌクレアースドメインを特定し,RNA干渉 (RNAi) でRNAの分解を潜在的に説明します.
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:
- RNA干渉 (RNAi) は,遺伝子発現を調節する生物学的プロセスである.
- RNAi効果は,RNA誘発サイレンシング複合体 (RISC) によって媒介されます.
- 以前の研究では,mRNAの分解に関与する4つのDrosophila RISC成分が特定されました.
研究 の 目的:
- RISC酵素の新しい成分を特定するために.
- RNAの干渉におけるTudor-SNの役割を調査する.
- Tudor-SN.の酵素活性を特徴づけるために
主な方法:
- タンパク質の識別と浄化.
- 核酸の活性測定法. 核酸の活性測定法. 核酸の活性測定法. 核酸の活性測定法.
- 酵素抑制に関する研究.
主要な成果:
- Tudor-SNは,Caenorhabditis elegans,Drosophila,および哺乳類におけるRISCの成分として特定されました.
- 浄化されたTudor-SNは,スタフィロコックスのヌクレアゼに匹敵するヌクレアゼ活性を示した.
- 浄化されたTudor-SNとRISCは,マイクロコックスの核酶阻害剤によって抑制された.
結論:
- Tudor-SNは,核酵素ドメインが認識可能な最初の特定されたRISCサブユニットです.
- Tudor-SNは,RNAiで観察されたRNAの分解に寄与している可能性が高い.
- この発見は,RNA干渉のメカニズムに関する新しい洞察を提供します.
関連する概念動画
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...
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 ends...
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...