精确地绘制RNA三级结构通过纳米距离测量与双电子-电子共振光谱学
Nak-Kyoon Kim1, Michael K Bowman, Victoria J DeRose
1Department of Chemistry, Texas A&M University, College Station, Texas 77842, USA.
Journal of the American Chemical Society
|June 19, 2010
概括
离子驱动头 рибо酶的折叠,这是一个关键的RNA分子. 双电子共振 (DEER) 谱学准确地测量了这些结构变化,证明了它对复杂的RNA分析的实用性.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 结构生物学 结构生物学
背景情况:
- 头核糖酶是关键的RNA酶,参与各种生物过程.
- 了解RNA折叠对于阐明它们的功能和机制至关重要.
- 二元金属离子,如,在稳定RNA结构方面发挥着至关重要的作用.
研究的目的:
- 为了研究Schistosoma mansoni头 ribozyme的Mg(2+) 依存折叠.
- 评估用于监测RNA结构动态的双电子共振 (DEER) 光谱的适用性.
- 将DEER衍生结构数据与现有的实验和计算模型进行比较.
主要方法:
- 利用脉冲电子磁共振光谱,特别是DEER,测量了 ribozyme 上的自旋标签之间的距离.
- 在头核糖酶的特定部位上附加了磁性旋转标签.
- 分析了DEER数据以确定纳米尺度的距离,反映了全球折叠事件.
主要成果:
- 德尔光谱学成功监测了头 рибо酶的双价金属离子依赖折叠.
- 测量的距离与实验,建模和结晶学数据的预测有很好的一致性.
- 证明了DEER在复杂RNA结构中捕捉全球折叠过渡的能力.
结论:
- 迪尔光谱是复杂RNA结构分析的强大而准确的工具.
- 这项研究提供了对头核糖酶的Mg2+依赖的折叠机制的见解.
- 这项工作验证了DEER作为一种有价值的技术,用于对核酸的结构生物学研究.
相关概念视频
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
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...
Double Resonance Techniques: Overview
Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
Spin decoupling is usually achieved by...
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 has a double-helix structure. The...
DNA Structure
DNA has a double-helix structure. The...


