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RNA Structure

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...

RNA Structure

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...

Nucleic Acid Structure

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...

Nucleic Acids

Nucleic Acids

Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and carry instructions for its functioning.
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes,...

RNA Stability

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...

Translational Regulation

Translational Regulation

Translational regulation in prokaryotes ensures efficient protein synthesis by controlling ribosome access to mRNA. This regulation is mediated by secondary RNA structures, including translational riboswitches, RNA thermometers, and small RNAs (sRNAs), which respond to intracellular and environmental signals to modulate gene expression.Translational RiboswitchesRiboswitches in the leader region of mRNAs can regulate translation by altering the accessibility of the Shine-Dalgarno (SD) sequence,...

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Updated: Jan 15, 2026

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

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

Published on: December 9, 2022

説明可能な機械学習を用いたRNA四量体構造ランドスケープの特性評価

Sompriya Chatterjee^1,2, Dhiman Ray^1,2

¹Department of Chemistry and Biochemistry, University of Oregon, Eugene, Oregon 97403, United States.

The journal of physical chemistry letters

|January 14, 2026

まとめ

この要約は機械生成です。

説明可能なAIと拡張サンプリングを組み合わせることで、RNA四量体の構造ランドスケープを効率的に探索できる。このアプローチは、主要な状態と遷移を明らかにし、計算コストを削減して核酸フォースフィールドを改善する。

キーワード:

RNA 四量体構造機械学習拡張サンプリングフォースフィールド

さらに関連する動画

Mapping RNA-RNA Interactions Globally Using Biotinylated Psoralen

Mapping RNA-RNA Interactions Globally Using Biotinylated Psoralen

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Sample Preparation for Mass Spectrometry-based Identification of RNA-binding Regions

Sample Preparation for Mass Spectrometry-based Identification of RNA-binding Regions

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関連する実験動画

Last Updated: Jan 15, 2026

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

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

Published on: December 9, 2022

Mapping RNA-RNA Interactions Globally Using Biotinylated Psoralen

Mapping RNA-RNA Interactions Globally Using Biotinylated Psoralen

Published on: May 24, 2017

Sample Preparation for Mass Spectrometry-based Identification of RNA-binding Regions

Sample Preparation for Mass Spectrometry-based Identification of RNA-binding Regions

Published on: September 28, 2017

科学分野:

計算生物学
構造生物学
生物物理学

背景:

RNA分子は、多様な生理機能に不可欠な構造的柔軟性を示します。
RNAの構造的複雑性は、短い四量体であっても、定量的な構造ランドスケープ解析に課題をもたらします。
従来の分子動力学法は、RNAの構造空間を探索するには計算コストが高すぎます。

研究の目的:

RNA四量体の構造ランドスケープを効率的に探索するための計算アプローチを開発および検証すること。
一本鎖RNA四量体における主要な構造状態と遷移を特定および特徴付けること。
データ駆動型の洞察を通じて核酸フォースフィールドの精度を向上させること。

主な方法:

説明可能な人工知能（XAI）と拡張サンプリングアルゴリズムの統合。
RNA四量体の分子動力学シミュレーションの実行。
構造変化における主要な駆動力の特定に解釈可能な機械学習を利用すること。

主要な成果:

積み重ね、インターカレーション、核酸塩基の反転、ランダムコイルといった主要なRNA四量体の構造状態を捉えることに成功しました。
標準的な手法と比較して計算コストを大幅に削減し、バイアスのない集団サンプリングを達成しました。
従来の解析で見逃されがちな準安定状態を区別しました。
遅いダイナミクスと非物理的な構造に影響を与える重要なねじれ角を特定しました。

結論:

説明可能なAIと拡張サンプリングは、複雑なRNA構造ランドスケープを探索するための効率的な戦略を提供します。
このデータ駆動型アプローチは、RNA構造ダイナミクスの特徴付けを強化します。
本研究の結果は、核酸フォースフィールドの改良とRNA機能の理解の基盤を提供します。