関連する実験動画
Updated: Jul 5, 2026

06:16
mirMachine: A One-Stop Shop for Plant miRNA Annotation
Published on: May 1, 2021
植物のmiRNAsとsiRNAsによる広範囲にわたる翻訳抑制
Peter Brodersen1, Lali Sakvarelidze-Achard, Marianne Bruun-Rasmussen
1Institut de Biologie Moléculaire des Plantes du CNRS, Unité Propre de Recherche 2357, 12 rue du Général Zimmer, 67084 Strasbourg Cedex, France.
まとめ
植物のマイクロRNA (miRNA) は,主に割れ方によって標的を静止する. 新しいアラビドプシス変異体は,ARGONAUTEタンパク質と細胞骨格のダイナミクスを含む,miRNAsと小干渉RNAs (siRNAs) に対する明確な翻訳抑制の役割を明らかにしています.
科学分野:
- 分子生物学は分子生物学である.
- 植物科学 植物科学について
- 遺伝学 遺伝学とは
背景:
- 植物マイクロRNA (miRNA) は,遺伝子発現の重要な調節因子である.
- miRNA媒介による静止は,伝統的に標的メッセンジャーRNA (mRNA) のエンドヌクレオリティック分裂に起因する.
- 植物ミRNAの作用における翻訳抑制の正確なメカニズムと範囲は,まだ完全に理解されていません.
研究 の 目的:
- 植物におけるmiRNA誘導遺伝子サイレンシングのメカニズムを調査する.
- 翻訳抑制が植物におけるmiRNA作用の重要な構成要素であるかどうかを判断する.
- miRNA媒介による翻訳抑制に関与する遺伝的要因を特定する.
主な方法:
- miRNA作用に欠陥のあるアラビドプシス変異体の分離と分析.
- miRNA誘導サイレンシング経路の遺伝子解剖.
- ARGONAUTEのタンパク質と細胞骨格の構成要素の役割に関する調査.
主要な成果:
- アラビドプシス変異体は,miRNA誘導サイレンシングの遺伝的に分離可能な翻訳阻害成分を明らかにした.
- この翻訳抑制メカニズムは,小さな干渉RNA (siRNA) 集団によって媒介される静止にも適用されます.
- ARGONAUTEタンパク質 (AGO1,AGO10),カタニン,およびVARICOSE (VCS) / Ge-1は,トランスレーション抑制に関与しており,動物で保存されたメカニズムを示唆しています.
結論:
- 植物のmiRNAとsiRNAのサイレンシングは,エンドヌクレオリチス分裂と異なる重要な翻訳抑制メカニズムを含んでいます.
- 細胞骨格のダイナミクスと,ARGONAUTEタンパク質やカタニンなどの特定のタンパク質因子は,この抑制に不可欠です.
- この発見は,小さなRNA媒介遺伝子サイレンシングの保存された分子メカニズムを王国全体で強調しています.
関連する概念動画
MicroRNAs
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...
MicroRNAs
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...
MicroRNAs
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...
RNA 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...
RNA 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...
Riboswitches
Riboswitches are non-coding mRNA domains that regulate the transcription and translation of downstream genes without the help of proteins. Riboswitches bind directly to a metabolite and can form unique stem-loop or hairpin structures in response to the amount of the metabolite present. They have two distinct regions – a metabolite-binding aptamer and an expression platform.
The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...
The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...

