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小分子によるRNAの三次構造を標的とする高通量競争性結合測定法:擬似ノットとG四重複体に適用
Sophie E L Wintermans1, Jana S Hoffmann1, Victor van Kuijk1
1Department of Medical Biochemistry, Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands.
Nucleic acids research
|August 30, 2025
まとめ
新しいアッセイは,シドノットやG四重複のような複雑なRNA構造を標的とする分子を特定します. バクテリアのリボスイッチとウイルスのRNAで検証されたこの高通量メソッドは,新しいRNAターゲティングリガンドの発見に役立ちます.
科学分野:
- 生物化学
- 分子生物学
- 薬物の発見
背景:
- 複雑なRNA三次構造 (例えば,擬似結節,G四重複) に結合する小分子を特定することは,新しい治療薬の開発に不可欠である.
- 既存のスクリーニング方法は,複雑なRNA標的に必要なスループットや特異性を欠いていることが多い.
研究 の 目的:
- 高通量競争力のある結合アンチセンセスを開発し,RNAの三次構造のリガンドを特定するために検証する.
- バクテリアのリボスイッチとウイルスのRNA構造の両方に適用することによって,アッセイの汎用性を実証する.
主な方法:
- 潜在的リガンドがラベル付けられた抗意味オリゴヌクレオチドとラベル付けられたRNA構造に結合するために競合する競争性結合測定法が設計された.
- 試験は当初,PreQ1-Iリボスイッチシドノットにカスタマイズされ,既知のリガンドおよび同類を用いて検証された.
- このアッセイは後にSARS-CoV-2のG-クアドルプレックス構造に適応され,既知のG-クアドルプレックスリガンドでテストされました.
主要な成果:
- Fusobacterium nucleatumのリボスイッチに対するライブラリスクリーンからヒット化合物 (4494) を成功裏に特定し,翻訳を阻害しました.
- 汚染物質の活動が確認されましたが 検査の高感度性を強調しました
- このアッセイは,SARS-CoV-2のG-クアドルプレックス構造に対して検証され,その広範な適用性を実証した.
結論:
- コンペティティブ・バインディング・アンチセンス・アッセイは,多様なRNA三次構造を標的とするリガンドを発見するための敏感で汎用的なツールです.
- このアッセイは,RNA標的薬の発見のための利用可能な方法論を拡張します.
- この発見は,RNA結合分子の効率的なスクリーニングを可能にすることで,新しい治療法の開発を容易にする.
関連する概念動画
RNA Structure
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...
Ligand Binding and Linkage
Allosteric proteins have more than one ligand binding site; the binding of a ligand to any of these sites influences the binding of ligands to the other sites. When a protein is allosteric, its binding sites are called coupled or linked. In the case of enzymes, the site that binds to the substrate is known as the active site and the other site is known as the regulatory site. When a ligand binds to the regulatory site, this leads to conformational changes in the protein that can influence the...
RNA Structure
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...
RNA Structure
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...
Nucleic Acid Structure
The pentose sugar in DNA is deoxyribose, while in RNA the pentose sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the ribose's second carbon and a hydrogen on the deoxyribose's second carbon. The phosphate residue attaches to the hydroxyl group of the 5′ carbon of one sugar and the hydroxyl group of the 3′ carbon of the sugar of the next nucleotide, which forms a 5′ to 3′ phosphodiester linkage.
DNA Structure
DNA has a double-helix structure. The...
DNA Structure
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