関連する実験動画
Updated: Jul 13, 2025
16:24
Analyzing and Building Nucleic Acid Structures with 3DNA
Published on: April 26, 2013
20.6K
RNA ダイナミック・アンサンブルにおける基底状態と興奮状態によって形成された原子3D構造の運動解像度
Rohit Roy1, Ainan Geng2, Honglue Shi3
1Center for Genomic and Computational Biology, Duke University School of Medicine, Durham, North Carolina 27710, United States.
Journal of the American Chemical Society
|October 13, 2023
まとめ
研究者はRNA興奮状態 (ES) の3D構造とダイナミクスを決定する新しい方法を開発した. このアプローチは RNAの折りたたみと機能の原子的な詳細を明らかにし, 人口が少ない,短命な形状も含む.
科学分野:
- 構造生物学
- バイオ物理学
- コンピュータ生物学
背景:
- RNAの折り畳みを理解するには,人口が少ない,短命の興奮状態 (ESs) を含む,その構成の風景の知識が必要です.
- 既存の方法はこれらの一時的なRNA状態の3D構造とダイナミクスを決定するのに苦労しています
研究 の 目的:
- ESを含むRNAコンフォメーションアンサンブルを特徴付けるための統合計算および実験的アプローチを開発し,実証する.
- 広範囲の時間スケールでRNAの3D構造を運動的に解明する.
主な方法:
- ローゼッタ-FARFARRNA構造予測とNMR残留二極結合とリラクゼーション分散を統合する.
- グラウンドステート (GS) とESサブセット,その相対的多量,および相互変換率の同時決定.
- このアプローチを検証するためにHIV-1 TAR RNAのアピカルループに適用します.
主要な成果:
- この研究は,HIV-1 TARのアピカルループのGSとESの両方の3D構造を成功裏に決定した.
- GSはオープンでタンパク質に結合する形状を持ち ESは閉じられた形状を示しています
- ピコ秒からマイクロ秒までの相互変換率で,ESの相対的な豊富さ (∼13%) と寿命 (∼45 μs) を定量化した.
結論:
- 開発されたアプローチは,RNA ESの原子的な見方を提供し,形状的サブステートを動態的に解消する.
- この方法は,RNAの折り畳み動力学と機能の定量的な理解を進める.
- 複雑なRNA構造の詳細な特徴づけを可能にします.
関連する概念動画
01:23RNA Structure
71.6K
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...
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...
71.6K
00:52¹H NMR of Conformationally Flexible Molecules: Temporal Resolution
868
At room temperature, the chair conformer of cyclohexane undergoes rapid ring flipping between two equivalent chair conformers at a rate of approximately 105 times per second. These two chair conformers are in equilibrium. The rapid ring flipping results in the interconversion of the axial proton to an equatorial proton and an equatorial to the axial proton. Such interconversions are too rapid and cannot be detected on the NMR timescale. Hence, the NMR spectrometer cannot distinguish between the...
868
01:19Protein Dynamics in Living Cells
2.1K
Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
2.1K
01:25Nucleic Acid Structure
6.2K
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...
DNA Structure
DNA...
6.2K