长长的双核金属圆柱体与DNA三向和四向结合点的相互作用
Samuel J Dettmer1, Hannah M P Stock1, Michael J Hannon2
1School of Chemistry, University of Birmingham, Edgbaston, B15 2TT, UK.
概括
研究人员开发了更长的金属圆柱体,可选择性地与非正规DNA结构结合,包括三向 (3WJ) 和四向 (4WJ) 连接. 这项工作凸显了长度如何调整DNA结合特异性的作用.
科学领域:
- 超分子化学 超分子化学
- 化学生物学 化学生物学
- 结构生物学 结构生物学
背景情况:
- 非正规的DNA结构,如三向 (3WJ) 和四向 (4WJ) 结,对于遗传代码的处理至关重要.
- 这些结构具有可以被互补分子准的中心腔.
- 之前的研究表明,双核金属圆柱由于尺寸,形状,电荷和π堆叠的互补性,有效地结合了3WJ腔.
研究的目的:
- 为了研究一个较长的金属圆柱体与延伸的π表面与非正规的DNA结构的结合.
- 为了评估这个新的金属圆柱体对3WJ和4WJ结构在双链DNA上的选择性.
- 了解调节超分子组件的长度如何影响DNA结合的特异性.
主要方法:
- 一个较长的金属圆柱体的合成和实验研究.
- 分子动力学 (MD) 模拟以建模结合相互作用.
- 用3WJ,4WJ和双链DNA进行比较的结合研究.
主要成果:
- 较长的金属圆柱选择性地与3WJ和4WJ结构结合,超过了双链DNA.
- 实验数据和MD模拟证实与3WJ结合,类似于较短的气.
- 医学模拟显示了两个转移稳定的4WJ形状,较长的圆柱体通过鱼在其中稳定一个形腔.
结论:
- 超分子气的长度是一个调节的参数,用于调节DNA结合.
- 金属圆柱体上延伸的π表面有助于结合到4WJ结构.
- 这项研究展示了一种针对不同DNA结构的策略,该策略使用了定制的超分子组件.
相关概念视频
Single-Strand DNA Binding Proteins
16.5K
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...
16.5K
DNA Topoisomerases
34.9K
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. ...
Types and Mechanism of action
Topoisomerases are divided into two main types. ...
34.9K
DNA Helicases
23.8K
DNA unwinding helicase enzymes are a type of motor protein. Motor proteins can translocate along filaments or polymers using energy generated from ATP hydrolysis. Helicases are involved in all the important cellular processes where DNA unwinding is required, such as DNA replication, repair, recombination, and transcription. They are present in all living organisms, but vary in their structure, function, and mechanism of action. For example, in prokaryotes, DnaB helicase binds and translocates...
23.8K
Nucleic Acid Structure
8.4K
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...
DNA Structure
DNA...
8.4K
The DNA Helix
155.4K
Overview
155.4K
The DNA Helix
28.8K
Deoxyribonucleic acid, or DNA, is the genetic material responsible for passing traits from generation to generation in all organisms and most viruses. DNA is composed of two strands of nucleotides that wind around each other to form a spring-like structure called a double helix. However, the double helix is not perfectly symmetrical. Instead, there are regularly occurring grooves in the structure. The major groove occurs where the sugar-phosphate backbones are relatively far apart. This space...
28.8K


