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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

Nanomanipulation of Single RNA Molecules by Optical Tweezers
06:59

Nanomanipulation of Single RNA Molecules by Optical Tweezers

Published on: August 20, 2014

RNAの二重複形成のための塩に依存した熱容量変化.

Jennifer C Takach1, Peter J Mikulecky, Andrew L Feig

  • 1Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, USA.

Journal of the American Chemical Society
|May 27, 2004
PubMed
まとめ

RNAの二重複形成の熱容量変化 (DeltaCP) は溶液のイオン強度に敏感であり,塩分濃度が高い場合より負になる. これはタンパク質の折りたたみと対照的であり,イオン凝縮がRNAの安定性に影響することを示唆しています.

科学分野:

  • バイオケミストリー バイオケミストリー
  • 分子生物学は分子生物学である.
  • 熱力学は熱力学である.

背景:

  • 熱容量変化 (DeltaCP) は,生物分子相互作用における重要な熱力学パラメータである.
  • タンパク質の折りたたみでは,デルタCPは主に水害性の表面埋葬と関連しており,弱いイオン強度依存を示しています.
  • RNAのデュプレックス形成には,そのポリイオニオン骨格による静電相互作用が含まれています.

研究 の 目的:

  • 溶液のイオン強度の熱容量変化 (DeltaCP) に及ぼす影響について,RNAの二重複形成過程で調べる.
  • タンパク質の折りたたみで観察されたものと,RNAの二重複形成におけるDeltaCPのイオン強度依存を比較する.

主な方法:

  • デュプレックス形成を測定するために,同熱定位熱計 (ITC) が使用されました.
  • DeltaCP.を決定するために,さまざまな温度で測定を行った.
  • イオン強度は,0.1から1.5Mの範囲のNaCl濃度を加えて体系的に変化させられました.

主要な成果:

  • RNA二重複の形成のためのDeltaCPは,研究された両方のRNA二重複のイオン強さに有意な依存を示した.
  • この依存性は,加えたNaCl濃度の対数と線形であった.

さらに関連する動画

Sequence-specific and Selective Recognition of Double-stranded RNAs over Single-stranded RNAs by Chemically Modified Peptide Nucleic Acids
09:04

Sequence-specific and Selective Recognition of Double-stranded RNAs over Single-stranded RNAs by Chemically Modified Peptide Nucleic Acids

Published on: September 21, 2017

Visualization and Quantification of Intermolecular RNA Base Pairing in in vitro RNA Clusters Using Split Broccoli RNA Reporters
10:52

Visualization and Quantification of Intermolecular RNA Base Pairing in in vitro RNA Clusters Using Split Broccoli RNA Reporters

Published on: May 29, 2026

関連する実験動画

Last Updated: Jul 6, 2026

Nanomanipulation of Single RNA Molecules by Optical Tweezers
06:59

Nanomanipulation of Single RNA Molecules by Optical Tweezers

Published on: August 20, 2014

Sequence-specific and Selective Recognition of Double-stranded RNAs over Single-stranded RNAs by Chemically Modified Peptide Nucleic Acids
09:04

Sequence-specific and Selective Recognition of Double-stranded RNAs over Single-stranded RNAs by Chemically Modified Peptide Nucleic Acids

Published on: September 21, 2017

Visualization and Quantification of Intermolecular RNA Base Pairing in in vitro RNA Clusters Using Split Broccoli RNA Reporters
10:52

Visualization and Quantification of Intermolecular RNA Base Pairing in in vitro RNA Clusters Using Split Broccoli RNA Reporters

Published on: May 29, 2026

  • デルタCP値は,イオン強度が増加するにつれて,より負の値になりました.

    • 結論:

    • RNAの二重複形成におけるDeltaCPの観察されたイオン強さの依存性は,RNAのポリイオニオン性および関連するイオン凝縮効果に起因する.
    • これは,タンパク質の折りたたみと対照的に,水害性の効果がDeltaCP.を支配する.
    • この発見は,静電相互作用がRNA二重複形成の熱力学において重要な役割を果たし,近隣効果を明らかにすることを示唆しています.