関連する実験動画
Updated: Jul 9, 2026

09:12
DNAzyme-dependent Analysis of rRNA 2’-O-Methylation
Published on: September 16, 2019
2'-5'RNAリガゼ活性を持つデオキシリボ酵素
Amber Flynn-Charlebois1, Yangming Wang, Tracey K Prior
1Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, IL 61801, USA.
Journal of the American Chemical Society
|February 27, 2003
まとめ
新しいデオキシリボ酵素はRNA基板を結合し,2′−5′結合を形成する. これらのDNA酵素はRNA結合を促進し,折り畳みを妨げることなく,改変したRNA構造と触媒の研究を可能にします.
科学分野:
- 分子生物学は分子生物学である.
- バイオケミストリー バイオケミストリー
- 合成生物学 合成生物学とは
背景:
- デオキシリボ酵素,またはDNA酵素は,伝統的にRNAと関連付けられている触媒的機能を提供します.
- 特定のRNA結合を創造するための効率的な方法は,RNAエンジニアリングと構造研究において極めて重要です.
研究 の 目的:
- 2つのRNA基板を結合できる新しいデオキシリボ酵素を特定し,特徴づけること.
- 新しく形成された2′-5′フォスフォディエステル結合がRNA構造と折り畳みに与える影響を評価する.
主な方法:
- RNA結合デオキシリボジームを発見するために,インビトロ選択が採用されました.
- 結合反応は,異なる条件 (pH,温度) で,収量と運動量に最適化されました.
- 非自然化するゲル電泳は,結合された構造RNAドメインの折り畳みを分析するために使用されました.
主要な成果:
- Mg(2+) に依存するデオキシリボ酵素が特定され,一晩間のインキュベーションで,結合RNAの50-60%の収量を達成しました.
- pH 9.0 でより迅速な結合 (1 時間で 40-50% の収量) が観察されました.
- テトラヒメナ群IイントロンP4-P6ドメインに導入された2′-5′結合は,そのMg(2+) 依存の折り畳みを有意に破壊しませんでした.
結論:
- 新種のデオキシリボ酵素は,2′-5′RNAのリンパエステル結合の形成を効率的に触媒化する.
- 導入された非ネイティブの2′-5′結合は,RNAの二次および三次構造形成と互換性があります.
- これらのデオキシリボ酵素は,構造-機能の研究のためにサイト特異的に改変されたRNAを準備するための貴重なツールです.
関連する概念動画
Types of RNA
Overview
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
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...
Eukaryotic RNA Polymerases
RNA Polymerase (RNAP) is conserved in all animals, with bacterial, archaeal, and eukaryotic RNAPs sharing significant sequence, structural, and functional similarities. Among the three eukaryotic RNAPs, RNA Polymerase II is most similar to bacterial RNAP in terms of both structural organization and folding topologies of the enzyme subunits. However, these similarities are not reflected in their mechanism of action.
All three eukaryotic RNAPs require specific transcription factors, of which the...
All three eukaryotic RNAPs require specific transcription factors, of which the...
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...
Ribozymes
The term ribozyme is used for RNA that can act as an enzyme. Ribozymes are mainly found in selected viruses, bacteria, plant organelles, and lower eukaryotes. Ribozymes were first discovered in 1982 when Tom Cech’s laboratory observed Group I introns acting as enzymes. This was shortly followed by the discovery of another ribozyme, Ribonulcease P, by Sid Altman’s laboratory. Both Cech and Altman received the Nobel Prize in chemistry in 1989 for their work on ribozymes.
Ribozymes can be...
Ribozymes can be...
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
DNA has a double-helix structure. The...

