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関連する概念動画

RNA Structure01:23

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...
RNA Stability01:53

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...
RNA Structure01:23

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...
RNA Stability01:53

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...
RNA Structure01:19

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...
Nucleic Acid Structure01:25

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...

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関連する実験動画

Updated: Jul 6, 2026

Mapping RNA-RNA Interactions Globally Using Biotinylated Psoralen
11:32

Mapping RNA-RNA Interactions Globally Using Biotinylated Psoralen

Published on: May 24, 2017

RNA構造の情報的複雑性と機能的活動

James M Carothers1, Stephanie C Oestreich, Jonathan H Davis

  • 1Howard Hughes Medical Institute and Department of Molecular Biology, Massachusetts General Hospital, Boston, MA, 02114 USA.

Journal of the American Chemical Society
|April 22, 2004
PubMed
まとめ

RNAの構造的複雑性の増加は結合活動を強化するが,豊富性を減少させる. この研究は,RNAアプタマーとリボ酵素におけるより緊密な結合の情報コストを定量化し,分子機能の一般的な原理を示唆しています.

科学分野:

  • 分子生物学は分子生物学である.
  • バイオフィジックス 生物物理学
  • バイオインフォマティックス

背景:

  • 機能的な核酸とタンパク質の配列の配列空間における分布は,ほとんど未知のままである.
  • 分子複雑性と生化学活動の関係を理解することは,合成生物学や薬剤開発などの分野において極めて重要です.

研究 の 目的:

  • RNA分子における構造的複雑性と機能的活動との関係を調査する.
  • 結合親和度や触媒効率が異なるRNA構造を特定するために必要な情報を定量化する.

主な方法:

  • 11種類の異なるGTP結合RNAアプタマーに最適な結合構造を定義するために必要な情報内容を実験的に測定しました.
  • 2つの触媒RNA (リボ酵素リガゼ) 分子の構造的複雑性と活性を比較した.
  • ランダムな配列プールにおける機能性RNA配列の豊富さを分析した.

主要な成果:

  • RNAアプタマーの結合親和性を10倍に増やすには,約10ビット以上の情報が必要で,これは5つの核酸位に相当する.
  • この情報内容の増加は,配列の豊富さの1000倍減少と相関していた.
  • 同様の複雑性-活性関係が触媒RNAで観察され,一般的な原理を示唆しています.

さらに関連する動画

Probing RNA Structure with Dimethyl Sulfate Mutational Profiling with Sequencing In Vitro and in Cells
10:34

Probing RNA Structure with Dimethyl Sulfate Mutational Profiling with Sequencing In Vitro and in Cells

Published on: December 9, 2022

Comparative RNA Structure Analysis of Nascent and Mature Transcripts in Saccharomyces cerevisiae
09:12

Comparative RNA Structure Analysis of Nascent and Mature Transcripts in Saccharomyces cerevisiae

Published on: February 27, 2026

関連する実験動画

Last Updated: Jul 6, 2026

Mapping RNA-RNA Interactions Globally Using Biotinylated Psoralen
11:32

Mapping RNA-RNA Interactions Globally Using Biotinylated Psoralen

Published on: May 24, 2017

Probing RNA Structure with Dimethyl Sulfate Mutational Profiling with Sequencing In Vitro and in Cells
10:34

Probing RNA Structure with Dimethyl Sulfate Mutational Profiling with Sequencing In Vitro and in Cells

Published on: December 9, 2022

Comparative RNA Structure Analysis of Nascent and Mature Transcripts in Saccharomyces cerevisiae
09:12

Comparative RNA Structure Analysis of Nascent and Mature Transcripts in Saccharomyces cerevisiae

Published on: February 27, 2026

結論:

  • RNAの構造を特定するために必要な情報と,その機能的活動との間には直接的な相関関係がある.
  • この原則は,他の生物学的および合成ヘテロポリマーにも適用され,客観的な機能的比較のための方法を提供することができます.
  • この発見は,新しい分子配列の機能的可能性を予測するのに役立ちます.