TDP-43の凝縮特性は,そのRNA結合および規制レパートリーを指定する
Martina Hallegger1, Anob M Chakrabarti2, Flora C Y Lee1
1The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK; Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, Queen Square, London WC1N 3BG, UK.
Cell
|August 11, 2021
まとめ
RNA結合タンパク質の凝縮は,細胞内の特定のRNAの調節に不可欠です. この研究は,TDP-43の凝縮が特定のRNA結合と遺伝子調節を駆動し,ALSのような疾患に影響することを示しています.
科学分野:
- 分子生物学
- 細胞生物学
- 神経科学
背景:
- RNA結合タンパク質 (RBPs) の変異は,アミオトロフィック横筋硬化症 (ALS) と関連しています.
- タンパク質-RNA複合体の特異性と機能におけるRBP凝縮の正確な役割は完全に理解されていません.
研究 の 目的:
- TDP-43 C端領域 (CTD) の凝縮傾向がRNA結合と調節における役割を調査する.
- RBPの凝縮が地域特有の方法で起こるかどうかを判断する.
主な方法:
- 異なる凝縮傾向を持つTDP-43 CTDの変種を作成しました.
- 試験管内の凝縮,核の移動性,および焦点形成の評価
- RNA結合領域と標的トランスクリプトの調節に関するTDP-43アセンブリを分析した.
主要な成果:
- 凝縮能力は,ユニークなモチーフクラスターを持つ特定のRNAサブセットの効率的なTDP-43アセンブリに不可欠でした.
- "結合領域濃縮物"はCTDホモメール相互作用によって促進される.
- これらのコンデンサートは,TDP-43の自己調節を含む結合トランスクリプトのサブセットを調節するために必要です.
結論:
- RNA結合タンパク質の凝縮は,RNA制御を選択的に調節する,地域特有の結合である.
- このメカニズムは,シグナル伝達,疾患 (ALSのような) および進化におけるトランスクリプトーム全体のRNAネットワークに影響を与えます.
関連する概念動画
02:13Cooperative Binding of Transcription Regulators
6.8K
Transcriptional regulators bind to specific cis-regulatory sequences in the DNA to regulate gene transcription. These cis-regulatory sequences are very short, usually less than ten nucleotide pairs in length. The short length means that there is a high probability of the exact same sequence randomly occurring throughout the genome. Since regulators can also bind to groups of similar sequences, this further increases the chances of random binding. Transcriptional regulators form...
6.8K
02:13Cooperative Binding of Transcription Regulators
2.2K
2.2K
01:19RNA Structure
5.7K
The basic structure of RNA consists of a string of ribonucleotides attached by phosphodiester bonds. Although most RNA is single-stranded, it can form complex secondary and tertiary structures. Such structures play essential roles in the regulation of transcription and translation.
Different Types of RNA Have the Same Basic Structure
There are three main types of ribonucleic acid (RNA) involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). All three...
Different Types of RNA Have the Same Basic Structure
There are three main types of ribonucleic acid (RNA) involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). All three...
5.7K
01:23RNA Structure
75.6K
Overview
The basic structure of RNA consists of a five-carbon sugar and one of four nitrogenous bases. Although most RNA is single-stranded, it can form complex secondary and tertiary structures. Such structures play essential roles in the regulation of transcription and translation.
Different Types of RNA Have the Same Basic Structure
There are three main types of ribonucleic acid (RNA): messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). All three RNA types consist of a...
The basic structure of RNA consists of a five-carbon sugar and one of four nitrogenous bases. Although most RNA is single-stranded, it can form complex secondary and tertiary structures. Such structures play essential roles in the regulation of transcription and translation.
Different Types of RNA Have the Same Basic Structure
There are three main types of ribonucleic acid (RNA): messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). All three RNA types consist of a...
75.6K
02:36RNA Polymerase II Accessory Proteins
9.9K
Proteins that regulate transcription can do so either via direct contact with RNA Polymerase or through indirect interactions facilitated by adaptors, mediators, histone-modifying proteins, and nucleosome remodelers. Direct interactions to activate transcription is seen in bacteria as well as in some eukaryotic genes. In these cases, upstream activation sequences are adjacent to the promoters, and the activator proteins interact directly with the transcriptional machinery. For example, in...
9.9K
02:36RNA Polymerase II Accessory Proteins
3.4K
3.4K