関連する実験動画
Updated: Jul 31, 2026
06:59
Nanomanipulation of Single RNA Molecules by Optical Tweezers
Published on: August 20, 2014
マルチサブユニットリボ酵素は,補完鎖RNA合成の触媒およびテンプレートである
J A Doudna1, S Couture, J W Szostak
1Department of Molecular Biology, Massachusetts General Hospital, Boston 02114.
Science (New York, N.Y.)
|March 29, 1991
まとめ
SunYのイントロン誘導体は,リボ酵素として作用し,補完的なRNA鎖を効率的に合成しました. これらのマルチサブユニットRNA複合体は,自己複製能力を示し,生命の初期における潜在的な経路を示唆した.
科学分野:
- 分子生物学は分子生物学である.
- 生命の起源 研究 研究 生命の起源
- RNAのカタリシス
背景:
- セルフスプライシング・イントロンは,トランスクリプトから自身の除去を触媒化するRNA分子です.
- リボ酵素,RNA酵素は,様々な生物学的プロセスにおいて重要な役割を果たします.
- RNAの触媒的潜在力を理解することは,前生物化学の探索の鍵です.
研究 の 目的:
- sunYセルフスプライシングイントロン誘導体の触媒的能力を調査する.
- 生命の初期シナリオにおけるRNAベースの自己複製の可能性を探求する.
- 分断されたリボ酵素が活性な触媒複合体を形成できるかどうかを判断する.
主な方法:
- sunYのセルフスプライシングイントロンの改変により,触媒派生物質が生成される.
- 改変したリボ酵素を RNA 断片に分離する.
- これらの断片化されたリボ酵素によって補完的なRNA鎖のテンプレート誘導合成を測定する.
主要な成果:
- SunYのイントロン誘導体は,オリゴヌクレオチドテンプレートを使用してRNA合成を効率的に触媒化しました.
- 3つの短いRNA断片から活性触媒複合体が形成された.
- マルチサブユニットリボジーム誘導体は,自身のサブユニットの一つに補完的なRNAを合成する能力を示しました.
結論:
- 断片化されたリボ酵素は,機能的な触媒複合体に組み立てることができます.
- セルフスプライシングイントロンから派生したRNA分子は,テンプレート誘導RNA合成を行うことができます.
- これらの発見は,RNAベースの自己複製が生命の先駆者であった可能性があるという仮説を支持する.
関連する概念動画
01:23Types 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...
02:53Ribosomal RNA Synthesis
Ribosome synthesis is a highly complex and coordinated process involving more than 200 assembly factors. The synthesis and processing of ribosomal components occurs not only in the nucleolus but also in the nucleoplasm and the cytoplasm of eukaryotic cells.
Ribosome biogenesis begins with the synthesis of 5S and 45S pre-rRNAs by distinct RNA polymerases. The primary transcripts are extensively processed and modified before they are bound and folded by ribosomal proteins and assembly factors,...
Ribosome biogenesis begins with the synthesis of 5S and 45S pre-rRNAs by distinct RNA polymerases. The primary transcripts are extensively processed and modified before they are bound and folded by ribosomal proteins and assembly factors,...
01:56Riboswitches
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...
02:47Ribozymes
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...
02:47Ribozymes
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...
02:53Ribosomal RNA Synthesis
Ribosome synthesis is a highly complex and coordinated process involving more than 200 assembly factors. The synthesis and processing of ribosomal components occurs not only in the nucleolus but also in the nucleoplasm and the cytoplasm of eukaryotic cells.
Ribosome biogenesis begins with the synthesis of 5S and 45S pre-rRNAs by distinct RNA polymerases. The primary transcripts are extensively processed and modified before they are bound and folded by ribosomal proteins and assembly factors,...
Ribosome biogenesis begins with the synthesis of 5S and 45S pre-rRNAs by distinct RNA polymerases. The primary transcripts are extensively processed and modified before they are bound and folded by ribosomal proteins and assembly factors,...