相关实验视频
Updated: May 26, 2026

06:59
Nanomanipulation of Single RNA Molecules by Optical Tweezers
Published on: August 20, 2014
自动RNA结构预测揭示了双糖氨酸核酸开关中的一个扭转链接器
Wipapat Kladwang1, Fang-Chieh Chou, Rhiju Das
1Department of Biochemistry, Stanford University, Stanford, California 94305, USA.
Journal of the American Chemical Society
|December 24, 2011
概括
自动化工具准确地预测了一种新型的RNA结构元素,对糖氨酸核糖交换机功能至关重要. 这一发现完善了我们对RNA三级结构和连接体结合的理解.
科学领域:
- 分子生物学分子生物学
- 结构生物学 结构生物学
- 生物信息学是一种生物信息学.
背景情况:
- 解读功能性RNA三级结构是一项挑战.
- 自动RNA结构预测工具需要实验验证.
研究的目的:
- 为了实验验证自动RNA结构预测工具.
- 为了研究双甘氨酸 рибо开关的结构和功能.
主要方法:
- 应用四种预测工具 (BPPalign,RMdetect,JAR3D,罗塞塔3D建模).
- 化学探测 (N-甲基化酸无水化物,二甲基硫酸盐等) 在 Fusobacterium nucleatum riboswitch 上. 这是一个很大的问题.
- 突变和映射研究和突变/救援实验.
- 对RNA结构破坏的热力学分析.
主要成果:
- 通过所有工具一致预测新型茎P0和扭转动机.
- 实验验证了体之间的结构化链接器.
- 螺旋连接螺旋结构的破坏显著损害了甘氨酸结合 (120倍和6-30倍增加解离常数).
- 结构链接器 (4.3 ± 0.5 kcal/mol) 的量化能量影响.
结论:
- 自动预测工具在识别新型RNA结构元素方面非常有效.
- 已识别的结构化链接器对于合作性糖氨酸结合在 рибо开关中至关重要.
- 之前的研究可能因RNA过度截断而错过了功能元素.
- 功能性RNA中的其他未被发现的元素可以使用自动预测工具来检测.
相关概念视频
Riboswitches
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...
Transcriptional Regulation: Riboswitches
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...
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...
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
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...
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...
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...
Types of RNA
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...

