相关实验视频
Updated: Jul 9, 2026

07:44
Design and Synthesis of a Reconfigurable DNA Accordion Rack
Published on: August 15, 2018
一个DNA化过渡产物可以通过结合局部化来稳定
Willem F Veldhuyzen1, Praveen Pande, Steven E Rokita
1Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742, USA.
Journal of the American Chemical Society
|November 13, 2003
概括
一种新型的9-氨基亚克里丁合物通过产生活性甲基中间体作为可诱导的DNA交叉链接剂. 这种合物高效地交叉链接DNA,产品显示出对 piperidine 处理的可变性.
科学领域:
- 有机化学 有机化学
- 化学生物学 化学生物学
- 分子生物学分子生物学
背景情况:
- DNA交叉链接剂是分子生物学和药物开发中的关键工具.
- 反应性中间体,如金甲基 (QM),提供独特的化学反应性进行修改.
- 阿克里丁衍生物以它们的DNA结合特性而闻名,使得有针对性的输送成为可能.
研究的目的:
- 为了合成和评估一个 9-aminoacridine 结合物,一个 silyl-protected bis(acetoxymethyl) (bisQMP) 作为一种可诱导的 DNA 交叉链接剂.
- 研究用于DNA修饰的反应性甲基中间体 (QM) 的化学成分.
- 探索阿克里丁部分和反应条件对DNA附加物形成的影响.
主要方法:
- 合成一个9-aminoacridine-bisQMP联合体.
- 使用化物离子诱导QM生成.
- 使用各种生物化学技术分析DNA化和交叉链接产品.
- 在特定处理条件下 (例如,热皮佩里丁) 评估产品的可变性.
主要成果:
- 结合物成功生成了QM等价物,导致DNA化和交叉链接.
- 反应主要发生在瓜的N7位置,尽管与2-氨基基组竞争.
- 阿克里丁的存在影响了对离子强度的反应性和灵敏性,模仿了间隙.
- 化物对于启动反应至关重要,没有观察到直接的基替代.
- 观察到交叉链接的高效率 (每4个化事件中有1个交叉链接).
- 化和交叉连接产品都对热皮佩里丁具有可变性,导致链分裂和逆转.
结论:
- 9-氨基亚克里丁-bisQMP结合物作为一种有效的诱导性DNA交叉链接剂.
- 这项研究表明,利用QM化学来针对性地修改DNA的实用性.
- 亚克里丁成分在指导反应性和调节交叉链接过程中发挥着关键作用.
相关概念视频
DNA Topoisomerases
Topoisomerases are enzymes that relax overwound DNA molecules during various cell processes, including DNA replication and transcription. These enzymes regulate positive and negative DNA supercoiling without changing the nucleotide sequence. DNA overwinding in a clockwise direction results in positively supercoiled DNA, whereas underwinding in a counterclockwise direction produces negatively supercoiled DNA.
Types and Mechanism of action
Topoisomerases are divided into two main types. Type I...
Types and Mechanism of action
Topoisomerases are divided into two main types. Type I...
Overview of DNA Repair
In order to be passed through generations, genomic DNA must be undamaged and error-free. However, every day, DNA in a cell undergoes several thousand to a million damaging events by natural causes and external factors. Ionizing radiation such as UV rays, free radicals produced during cellular respiration, and hydrolytic damage from metabolic reactions can alter the structure of DNA. Damages caused include single-base alteration, base dimerization, chain breaks, and cross-linkage.
Chemically...
Chemically...
Homologous Recombination
The basic reaction of homologous recombination (HR) involves two chromatids that contain DNA sequences sharing a significant stretch of identity. One of these sequences uses a strand from another as a template to synthesize DNA in an enzyme-catalyzed reaction. The final product is a novel amalgamation of the two substrates. To ensure an accurate recombination of sequences, HR is restricted to the S and G2 phases of the cell cycle. At these stages, the DNA has been replicated already and the...
Gene Conversion
Other than maintaining genome stability via DNA repair, homologous recombination plays an important role in diversifying the genome. In fact, the recombination of sequences forms the molecular basis of genomic evolution. Random and non-random permutations of genomic sequences create a library of new amalgamated sequences. These newly formed genomes can determine the fitness and survival of cells. In bacteria, homologous and non-homologous types of recombination lead to the evolution of new...
Conservative Site-specific Recombination and Phase Variation
Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
The recognition sites for Cre recombinase called LoxP...
The recognition sites for Cre recombinase called LoxP...
Gene Conversion
Other than maintaining genome stability via DNA repair, homologous recombination plays an important role in diversifying the genome. In fact, the recombination of sequences forms the molecular basis of genomic evolution. Random and non-random permutations of genomic sequences create a library of new amalgamated sequences. These newly formed genomes can determine the fitness and survival of cells. In bacteria, homologous and non-homologous types of recombination lead to the evolution of new...

