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相关概念视频

Nucleic acids02:43

Nucleic acids

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, the...
RNA Stability01:53

RNA Stability

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...
Nucleic Acids02:43

Nucleic Acids

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, the...
RNA Stability01:53

RNA Stability

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...
Nucleic Acids and Nucleotides01:20

Nucleic Acids and Nucleotides

Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and have instructions for its functioning. The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).
Deoxyribonucleic Acid (DNA)
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 the organelles such as chloroplasts and mitochondria. In...
Nucleic Acid Structure01:25

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...

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相关实验视频

Updated: Jun 20, 2026

Sequence-specific and Selective Recognition of Double-stranded RNAs over Single-stranded RNAs by Chemically Modified Peptide Nucleic Acids
09:04

Sequence-specific and Selective Recognition of Double-stranded RNAs over Single-stranded RNAs by Chemically Modified Peptide Nucleic Acids

Published on: September 21, 2017

氨基糖化物-核酸相互作用:通过neomycincin显著稳定DNA和RNA三重螺旋.

D P Arya1, R L Coffee, B Willis

  • 1Laboratory of Medicinal Chemistry, Department of Chemistry, Clemson University, Clemson, SC 29634, USA. dparya@clemson.edu

Journal of the American Chemical Society
|June 8, 2001
PubMed
概括

尼奥米辛有效地稳定了DNA和RNA三重螺旋,比其他药物具有更高的选择性. 这种稳定与氨基糖化物毒性相关,这表明它在H-DNA稳定中发挥了作用.

科学领域:

  • 分子生物学分子生物学
  • 生物化学 生物化学
  • 结构生物学 结构生物学

背景情况:

  • DNA和RNA三重螺旋是关键的核酸结构.
  • 已知氨基糖化物与核酸相互作用.

研究的目的:

  • 通过neomycin研究DNA和RNA三重螺旋的稳定.
  • 为了比较neomycin与其他三倍结合配体的效果.

主要方法:

  • 紫外线热分析以确定融温度.
  • 协会和解离率的动态分析.
  • 激活能量的确定 (E (开启) 和E (关闭)).

主要成果:

  • 菌素显著稳定了DNA和RNA的三重螺旋,对双螺旋的影响最小.
  • 与其他氨基糖化物,小沟结合剂和聚合物相比,尼奥米辛表现出优异的三倍选择性.
  • 增加的新米素度会增加三倍体形成率 (k ((on)) 并改变激活能量.
  • 三重螺旋的氨基糖化物稳定与它们已知的毒性作用相关.

结论:

  • 尼奥米是一种强大且有选择性的稳定核酸三重螺旋体的药物.

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Sequence-specific and Selective Recognition of Double-stranded RNAs over Single-stranded RNAs by Chemically Modified Peptide Nucleic Acids
09:04

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Published on: September 21, 2017

DNAzyme-dependent Analysis of rRNA 2’-O-Methylation
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DNAzyme-dependent Analysis of rRNA 2’-O-Methylation

Published on: September 16, 2019

CD Spectroscopy to Study DNA-Protein Interactions
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CD Spectroscopy to Study DNA-Protein Interactions

Published on: February 10, 2022

  • 这些发现表明,氨基甘油酸在稳定分子内三重螺旋 (H-DNA) 中可能发挥作用.
  • 对氨基糖化物-H-DNA相互作用的进一步研究可能会阐明它们的生物功能和毒性机制.