転写介質のNMR構造プロファイリングは,メタステーブルなRNA構成によるリボスイッチ調節を明らかにする
関連する実験動画
Updated: Mar 8, 2026
06:59
Nanomanipulation of Single RNA Molecules by Optical Tweezers
Published on: August 20, 2014
15.5K
Christina Helmling1, Anna Wacker1, Michael T Wolfinger2
1Institute for Organic Chemisty and Chemical Biology, Center for Biomolecular Magnetic Resonance (BMRZ), Johann Wolfgang Goethe-Universität , Frankfurt/M. 60438, Germany.
Journal of the American Chemical Society
|January 31, 2017
まとめ
研究者は,リボスイッチの調節を理解するために,転写中のRNAの構成変化をマッピングしました. 彼らは,トランスクリプトの長さに基づくリガンド結合とアロステリックスイッチングの正確な制御を発見し,遺伝子調節における転移状態の役割を強調した.
科学分野:
- 分子生物学
- 生物化学
- 構造生物学
背景:
- 遺伝子調節はRNA合成,折り畳み,終結と結びついています
- リボスイッチは小さな分子を感知し 遺伝子発現を制御する 制御RNAです
- リボスイッチの機能に トランスクリプトの長さがどう影響するかを理解することは リボスイッチの制御メカニズムの解読に不可欠です
研究 の 目的:
- リボスイッチにおけるmRNA転写長に対するリガンド結合とアロステル型変異の依存性を調査する.
- シングル・ヌクレオチド解像度でのRNA合成中の転写中間体の構成空間の変化をマッピングする.
- RNAベースの遺伝子調節におけるメタステーブル状態の役割を解明する.
主な方法:
- 転写介質の構造を分析するために,核磁気共振 (NMR) スペクトロスコーピーを用いた.
- 構造分析は単核酸解像度で実施した.
- この研究は,メソプラズマ・フローラムのIA型2'dGセンサーリボスイッチに焦点を当てた.
主要な成果:
- リガンド結合の厳格な微調整と構造空間における配列依存の変化が観察された.
- この研究では,トランスクリプトの長さがリボスイッチのアロステリック構成スイッチにどのように影響するかを明らかにした.
- メタステーブル状態は,RNAベースの遺伝子調節にとって重要であると特定された.
結論:
- この発見は,RNA合成とリボスイッチ機能の折り合いを解剖するための一般的な枠組みを提供します.
- トランスクリプトの長さは,リボスイッチ結合と調節活動に重大な影響を及ぼします.
- メタステーブルRNA状態は,リボスイッチ媒介の遺伝子調節のメカニズムにおいて重要な役割を果たします.
さらに関連する動画
10:34Probing RNA Structure with Dimethyl Sulfate Mutational Profiling with Sequencing In Vitro and in Cells
Published on: December 9, 2022
5.4K
12:54Real-time Analysis of Transcription Factor Binding, Transcription, Translation, and Turnover to Display Global Events During Cellular Activation
Published on: March 7, 2018
14.1K
関連する概念動画
01:56Riboswitches
9.9K
Riboswitches are non-coding mRNA domains that regulate the transcription and translation of downstream genes without the help of proteins. Riboswitches bind directly to a metabolite and can form unique stem-loop or hairpin structures in response to the amount of the metabolite present. They have two distinct regions – a metabolite-binding aptamer and an expression platform.
The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...
The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...
9.9K
01:23Transcriptional Regulation: Riboswitches
960
Riboswitches are RNA elements that regulate gene expression by altering their secondary structures in response to specific effector molecules. These elements, located in the leader regions of certain mRNAs, act as transcriptional regulators by toggling between alternative conformations to control downstream gene expression. Riboswitch-mediated regulation is a precise mechanism for modulating biosynthetic pathways, as exemplified by the riboflavin biosynthesis pathway in Bacillus...
960
01:29Translational Regulation
738
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,...
738
01:23Types of RNA
73.5K
Overview
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 the regulation of 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...
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 the regulation of 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...
73.5K
01:20Types of RNA
10.2K
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...
RNA Performs Diverse...
10.2K
01:53RNA Stability
36.0K
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...
36.0K