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Ribosome Profiling02:24

Ribosome Profiling

3.4K
Ribosome profiling or ribo-sequencing is a deep sequencing technique that produces a snapshot of active translation in a cell. It selectively sequences the mRNAs protected by ribosomes to get an insight into a cell’s translation landscape at any given point in time.
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique...
3.4K
RNA Stability01:53

RNA Stability

33.0K
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...
33.0K
Nucleic Acid Structure01:25

Nucleic Acid Structure

5.8K
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...
5.8K
RNA Structure01:19

RNA Structure

4.5K
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...
4.5K
Types of RNA01:20

Types of RNA

5.5K
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...
5.5K
Nucleic Acids02:43

Nucleic Acids

43.0K
Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and carry instructions for its functioning.
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes,...
43.0K

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相关实验视频

Updated: May 12, 2025

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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研究RNA结构动态和RNA化学探测实验之间的相互作用.

Ethan B Arnold1, Daniel Cohn1, Emma Bose1

  • 1Department of Chemistry, New York University, 31 Washington Place, NY 10003, United States.

Nucleic acids research
|April 16, 2025
PubMed
概括

化学探测器揭示了复杂的RNA动态. 与探针度的意外反应性转移表明合作结合,可以帮助推断核酸配对相互作用,影响RNA结构.

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Practical Aspects of Sample Preparation and Setup of 1H R1ρ Relaxation Dispersion Experiments of RNA
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Practical Aspects of Sample Preparation and Setup of 1H R1ρ Relaxation Dispersion Experiments of RNA

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科学领域:

  • 分子生物学分子生物学
  • 生物物理学的生物物理.
  • 化学生物学 化学生物学

背景情况:

  • 小分子化学探针对于确定RNA结构至关重要.
  • 最近的模拟表明,合作性RNA探针结合会影响反应性.
  • 了解这种关系是准确RNA结构分析的关键.

研究的目的:

  • 为了研究RNA结构动力学和化学探针反应性之间的相互作用.
  • 探索探针度如何影响核酸修饰率.
  • 为了确定观察到的反应性转移是否可以推断出RNA配对相互作用.

主要方法:

  • 使用选择性2'-基乙化,通过原料扩展 (SHAPE) 和二甲基硫酸盐 (DMS) 化学探测进行分析.
  • 采用核磁共振 (NMR) 光谱,包括化学交换实验.
  • 分析了不同探针度的RNA核酸活性.

主要成果:

  • 核磁共振 (NMR) 显示了SHAPE反应性,基配对核酸中的高伊米诺质子交换率.
  • 随着探针度的增加,核酸修饰速率的意外变化被观察到.
  • 证明了一些基配对核酸在更高的探针度下变得有反应性,与补充核酸变化相关.

结论:

  • RNA的结构动力学对化学探测器的反应性有着复杂的影响.
  • 合作约束效应可以导致非线性反应性趋势.
  • 利用度依赖的反应性转移可能使得RNA配对相互作用和结构组合的推断成为可能.