関連する実験動画
Updated: Dec 19, 2025

06:48
A Reporter Assay to Analyze Intronic microRNA Maturation in Mammalian Cells
Published on: June 16, 2022
2.3K
A-改変mRNAを調節するYTHDFタンパク質の機能に関する統一モデル
Sara Zaccara1, Samie R Jaffrey1
1Department of Pharmacology, Weill Cornell Medicine, Cornell University, New York, NY 10065, USA.
Cell
|June 4, 2020
まとめ
N6-メチラデノシン (m6A) RNAの改変は細胞の分化を調節する. 以前は異なるmRNAを結合すると考えられていたYTHDFタンパク質は,実際には同じmRNAを結合し,mRNAの分解と分化を冗長的に媒介する.
科学分野:
- 分子生物学
- エピジェネティクス
- RNA 生物学
背景:
- N6-メチラデノシン (m6A) は最も一般的なmRNA変異である.
- m6Aは細胞生理学と分化を調節する.
- 細胞質のYTHDF m6A結合タンパク質 (DF1,DF2,DF3) は重要なメディエーターである.
研究 の 目的:
- YTHDFタンパク質とm6A改変mRNAの結合相互作用を調査する.
- mRNAの調節と細胞の分化におけるYTHDFタンパク質の機能的役割を解明する.
- m6A機能の支配的なモデルに挑戦し,改良する.
主な方法:
- m6A改変mRNAへのYTHDFタンパク質結合の分析
- mRNAの翻訳と分解を評価するためのHeLa細胞での機能検査.
- DFパラログの枯渇研究で,その組み合わせ効果を評価する.
主要な成果:
- YTHDFタンパク質は,以前のモデルとは異なり,同じm6A改変mRNAと結合する.
- YTHDFタンパク質はHeLa細胞での翻訳を誘導しない.
- DFパラログは,mRNAの分解と細胞の分化を媒介するために冗長的に作用し,効果は同時に枯渇したときにのみ明らかになります.
- YTHDFタンパク質がm6AmRNAに集団的に作用する統一モデル.
結論:
- YTHDFタンパク質は,mRNAの安定性と細胞の分化を制御するために多余的に機能する.
- YTHDFの3つのパラログを同時に消耗させるのは,それらの完全な影響を観察するために必要である.
- この研究は,YTHDFタンパク質によるm6ARNA調節のための統一モデルを提案しています.
関連する概念動画
Regulation of Expression at Multiple Steps
1.3K
The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the...
1.3K
mRNA Stability and Gene Expression
6.3K
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
6.3K
mRNA Stability and Gene Expression
3.3K
3.3K
RNA Stability
35.4K
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...
35.4K
Regulation of Expression Occurs at Multiple Steps
25.5K
Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
25.5K
Regulation of Expression Occurs at Multiple Steps
3.7K
3.7K

