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関連する概念動画

RNA Structure01:23

RNA Structure

78.6K
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...
78.6K
RNA Structure01:19

RNA Structure

6.7K
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...
6.7K
Leaky Scanning02:28

Leaky Scanning

5.6K
During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA.  Marilyn Kozak discovered that the sequence RCCAUGG (where R...
5.6K
Types of RNA01:20

Types of RNA

8.7K
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 regulating 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 Performs Diverse...
8.7K
RNA Stability01:53

RNA Stability

35.5K
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...
35.5K
Conserved Binding Sites01:49

Conserved Binding Sites

5.0K
Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally...
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関連する実験動画

Updated: Jan 2, 2026

Optical Tweezers to Study RNA-Protein Interactions in Translation Regulation
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Optical Tweezers to Study RNA-Protein Interactions in Translation Regulation

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隠された高アフィニティRNAコンフォーメーション状態を暴露する

Nicole I Orlovsky1, Hashim M Al-Hashimi1,2, Terrence G Oas1,2

  • 1Department of Biochemistry , Duke University Medical Center , Durham , North Carolina 27710 , United States.

Journal of the American Chemical Society
|December 10, 2019
PubMed
まとめ
この要約は機械生成です。

RNA結合親和性を理解するには,形状的罰則を考慮する必要があります. この研究は,RNA-リガンド結合が全体的に弱い場合でも,特定のプリフォールドされたRNA状態に強い結合が関与し,薬物発見に影響を及ぼすことを明らかにしています.

さらに関連する動画

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

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An Assay for Quantifying Protein-RNA Binding in Bacteria
07:02

An Assay for Quantifying Protein-RNA Binding in Bacteria

Published on: June 12, 2019

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関連する実験動画

Last Updated: Jan 2, 2026

Optical Tweezers to Study RNA-Protein Interactions in Translation Regulation
12:26

Optical Tweezers to Study RNA-Protein Interactions in Translation Regulation

Published on: February 12, 2022

5.6K
Probing RNA Structure with Dimethyl Sulfate Mutational Profiling with Sequencing In Vitro and in Cells
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Probing RNA Structure with Dimethyl Sulfate Mutational Profiling with Sequencing In Vitro and in Cells

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An Assay for Quantifying Protein-RNA Binding in Bacteria
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An Assay for Quantifying Protein-RNA Binding in Bacteria

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科学分野:

  • 生物化学
  • 構造生物学
  • 分子生物物理学

背景:

  • RNA結合親和性は,構成変化と関連するエネルギーコストによって影響を受け",構成ペナルティ"と呼ばれます.
  • これらの罰則を測定することは,結合されたRNA構成はしばしば結合されていない状態で検知できない集団を持っているため,困難です.

研究 の 目的:

  • 結合RNAの構成変化とリガンド結合の熱力学モデルを開発する.
  • HIV-1 TAR RNA-アルギニナミド (ARG) 相互作用モデルシステムにおける構成上の罰則を定量化する.

主な方法:

  • 核磁気共鳴 (NMR) 化学シフトの乱れとリラクゼーションの分散を利用した.
  • 低人口状態のエネルギーを推定するために12状態モデルにベイジアン推論を適用した.
  • HIV-1 TAR RNAとアルギニナミド (ARG) の相互作用を,タットタンパク質の模倣として調査した.

主要な成果:

  • TAR構成とARG占有率に基づいて,少なくとも4つの異なるRNA中間物質を特定した.
  • 2つのARGリガンドを持つ支配的な結合された TAR構成は,検出限界以下の均衡集団が結合されていないことが明らかになった.
  • ARGは,弱い表面的な全体的な親和度 (0. 2mM) にかかわらず,ナノモラー親和度で,前折れた TAR形状に結合することを実証した.

結論:

  • 適合性罰則は,RNA-リガンド結合親和性を著しく決定し,結合協力性を誘導することができる.
  • RNA認識の正確な予測には,形状転換のエネルギーコストを考慮する必要があります.
  • この発見は,RNA標的薬の発見とRNA-タンパク質の相互作用の理解に意味を持つ.