作为DNA双重稳定性的忠实度和亲和度增强调节剂的5'-结合式stilbene衍生物
Zeynep Dogan1, Ralph Paulini, Jan A Rojas Stütz
1Institute for Organic Chemistry, University of Karlsruhe (TH), D-76131 Karlsruhe, Germany.
Journal of the American Chemical Society
|April 15, 2004
概括
斯蒂尔-DNA合物显著提高了DNA复杂稳定性和不匹配检测. 这些修改提高了DNA芯片的可靠性,使得基因分析更准确.
科学领域:
- 化学生物学 化学生物学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 对于分子诊断和遗传分析来说,DNA双重稳定性至关重要.
- 用外部连接体修改DNA可以改变其结构和热力学特性.
- 开发方法来提高DNA忠实性和不匹配歧视是一个持续的挑战.
研究的目的:
- 为了合成和表征新的5'-链接的stilbene-DNA结合物.
- 为了研究 stilbene 替代剂对 DNA 复合稳定性和化温度的影响.
- 评估这些结合物的潜力,以提高DNA微阵列的性能和保真度.
主要方法:
- 合成5'-链接的stilbene-DNA结合物与各种替代剂.
- 使用紫外线化曲线分析确定DNA双重稳定性.
- 在改造的DNA复合体中对不匹配歧视的评估.
- 评估DNA微阵列上的三甲氧基盖.
主要成果:
- 每次修改,trimethoxystilbene替代剂的双重点增加了高达12.2°C.
- 基替代剂显著放大了终端不匹配的破坏稳定的效果 (高达23.4°C).
- 氨基甲基基合物增加了A / T丰富的DNA的点,模仿了G / C丰富的双重组.
- 在DNA微阵列上增强了trimethoxystilbene的亲和力和选择性.
结论:
- 5'-链接的stilbene-DNA结合物提供了一个强大的策略来调节DNA双重稳定性并增强不匹配检测.
- 这些修改可以显著提高基于DNA的技术 (包括DNA芯片) 的性能和可靠性.
- 在自动化DNA合成中,易于将trimethoxystilbene phosphoramidite纳入,这有助于开发先进的DNA微阵列.
相关概念视频
Phosphodiester Linkages
Overview
Phosphodiester bond forms when a phosphoric acid molecule (H3PO4) links with two hydroxyl groups (–OH) of two other molecules, forming two ester bonds. Two water molecules are released in this process. The phosphodiester bond is commonly found in nucleic acids (DNA and RNA) and plays a critical role in their structure and function.
Phosphodiester Bonds Link Nucleotides Together
DNA and RNA are polynucleotides or long chains of nucleotides that are linked together. A nucleotide is...
Phosphodiester bond forms when a phosphoric acid molecule (H3PO4) links with two hydroxyl groups (–OH) of two other molecules, forming two ester bonds. Two water molecules are released in this process. The phosphodiester bond is commonly found in nucleic acids (DNA and RNA) and plays a critical role in their structure and function.
Phosphodiester Bonds Link Nucleotides Together
DNA and RNA are polynucleotides or long chains of nucleotides that are linked together. A nucleotide is...
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...
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...
Single-Strand DNA Binding Proteins
For successful DNA replication, the unwinding of double-stranded DNA must be accompanied by stabilization and protection of the separated single strands of the DNA. This crucial task is performed by single-strand DNA-binding (SSB) proteins. They bind to the DNA in a sequence-independent manner, which means that the nitrogenous bases of the DNA need not be present in a specific order for binding of SSB proteins to it. The binding of SSB proteins straightens single-stranded DNA (ssDNA) and makes...
Stability of Conjugated Dienes
Introduction
A comparison of the enthalpies of hydrogenation of dienes reveals that conjugated dienes release less heat on hydrogenation, rendering them more stable than their nonconjugated analogs.
A comparison of the enthalpies of hydrogenation of dienes reveals that conjugated dienes release less heat on hydrogenation, rendering them more stable than their nonconjugated analogs.
Radical Reactivity: Steric Effects
The presence of electron-donating, electron-withdrawing, or conjugating groups adjacent to a radical center, imparts electronic stabilization to the radicals. Examples of such electronically-stabilized radicals are triphenylmethyl, tetramethylpiperidine‐N‐oxide, and 2,2‐diphenyl‐1‐picrylhydrazyl. These radicals are remarkably stable and are known as persistent radicals. Some of the persistent radicals can even be isolated and purified.
Along with electronic factors, steric factors also account...
Along with electronic factors, steric factors also account...


