関連する実験動画
Updated: Jun 23, 2026

06:48
A Reporter Assay to Analyze Intronic microRNA Maturation in Mammalian Cells
Published on: June 16, 2022
マイクロRNAは,開発中の環境変動に対して頑丈さを与えている
Xin Li1, Justin J Cassidy, Catherine A Reinke
1Department of Biochemistry, Molecular Biology and Cell Biology, 2205 Tech Drive, Northwestern University, Evanston, Illinois 60208, USA.
Cell
|April 22, 2009
まとめ
マイクロRNAmiR-7は,環境変化に対する発達ネットワークの安定化に役立ちます. この保存されたマイクロRNA (miRNA) は遺伝子調節を緩衝し,種間の発達安定性を確保します.
科学分野:
- 進化的発達生物学 進化的発達生物学
- 遺伝学 遺伝学とは
- 分子生物学は分子生物学である.
背景:
- マイクロRNA (miRNA) は遺伝子発現の重要な調節体であり,様々な種にわたって保存されています.
- マイクロRNAmiR-7は,無脊椎動物から人間まで高度に保存されています.
- しかし,miR-7によって調節される特定の遺伝子は,種によって異なる可能性があり,系統特有の役割を示唆しています.
研究 の 目的:
- マイクロRNA-ターゲット関係の進化的意義を調査する.
- マイクロRNA機能における系統限定標的の役割を調査する.
- miR-7が開発上の規制ネットワークの強固さにどのように貢献するのかを理解する.
主な方法:
- ドロソフィラの2つのよく特徴づけられた発達制御ネットワークを研究した.
- フィードバックとフィードフォワードループ内のmiR-7の機能を分析した.
- 安定性を評価するために,規制ネットワークを温度変動にさらした.
主要な成果:
- miR-7は,複数の相互接続フィードバックとフィードフォワードループに参加しています.
- miR-7は,環境ストレス (温度変動) の下で規制の安定性を維持するために不可欠です.
- miR-7が発達ネットワークの混乱に対するバッファとして作用することを実証した.
結論:
- miR-7のような保存されたマイクロRNAは,開発プログラムをバッファリングするために新しい遺伝的相互作用を形成することができます.
- これらの相互作用は,環境の変動に対する強度を強化します.
- miR-7は,発達の安定性と適応性を確保する上で重要な役割を果たします.
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 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...
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...
RNA Stability
Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
RNA Stability
Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
mRNA Stability and Gene Expression
The structure and stability of mRNA molecules regulates gene expression, as mRNAs are a key step in the pathway from gene to protein. In eukaryotes, the half-life of mRNA varies from a few minutes up to several days. mRNA stability is essential in growth and development. The absence of the proteins regulating its stability, such as tristetraprolin in mice, can cause systemic issues, including bone marrow overgrowth, inflammation, and autoimmunity.
Cis-acting Elements involved in mRNA stability
Cis-acting Elements involved in mRNA stability

