相关实验视频
Updated: Jul 16, 2026

16:24
Analyzing and Building Nucleic Acid Structures with 3DNA
Published on: April 26, 2013
使用DNA作为分子桥梁的中尺度结构的受控组装
Carissa M Soto1, Amritha Srinivasan, Banahalli R Ratna
1Naval Research Laboratory, Center for Bio/Molecular Science and Engineering, 4555 Overlook Avenue SW, Washington, DC 20375, USA. cmsoto@cbmse.nrl.navy.mil
Journal of the American Chemical Society
|July 18, 2002
概括
研究人员使用DNA纳米技术创建了中等尺度的多面体结构. 特定尺寸的聚乙烯珠的二元混合物与DNA相连,形成四面体和八面体,证明了新的构建块.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 生物化学 生物化学
背景情况:
- 自组装是自然和材料科学中的一个基本过程.
- DNA纳米技术提供了对分子组装的精确控制.
- 从体颗粒中创建有序的中等尺度结构是具有挑战性的.
研究的目的:
- 开发一种方法来构建精确的介面尺度多面体结构.
- 为了利用DNA作为一种特定的分子链接器,用于体组装.
- 用二元微球混合物演示定义的多面体构建块的形成.
主要方法:
- 用 carboxydiimide 化学物质对碳氧基改性聚乙烯微球进行了功能化,并与单链DNA进行了功能化.
- 在共聚焦显微镜中,使用光标记的DNA来确认通过光共振能量转移 (FRET) 的杂交.
- 具有特定尺寸比的微球的二元混合物 (0.818/0.211微米和0.818/0.364微米) 结合在一起形成多面体结构.
- 在反射模式的共聚焦显微镜和扫描电子显微镜 (SEM) 用于结构特征.
主要成果:
- 通过FRET证实了聚乙烯珠子与DNA的成功装饰.
- 自组装成定义的多面体结构的DNA功能化珠子的特定尺寸比.
- 使用0.818微米和0.211微米的珠子形成了四面体结构.
- 使用0.818微米和0.364微米的珠子形成了八面体结构.
- 同焦点和SEM数据证实了中等尺度多面体构建块的形成.
结论:
- 通过DNA介导的组装提供了一种强大的方法来创建有序的中等尺度多面体结构.
- 构成微球的尺寸比对于指导特定多面体几何形状的形成至关重要.
- 这种方法为设计和制造新型中介尺度材料提供了一条途径,在光子学,催化和传感方面具有潜在的应用.
相关概念视频
The DNA Helix
Overview
DNA as a Genetic Template
Two structural features of the DNA molecule provide a basis for the mechanisms of heredity: the four nucleotide bases and its double-stranded nature. The Watson-Crick model of double-helical DNA structure, proposed in 1952, drew heavily upon the X-ray crystallography work of researchers Rosalind Franklin and Maurice Wilkins. Watson, Crick, and Wilkins jointly received the Nobel Prize in Physiology or Medicine for their work in 1962. Franklin was, controversially, excluded from the prize for...
DNA Microarrays
Microarrays are high-throughput and relatively inexpensive assays that can be automated to analyze large quantities of data at a time. They are used in genome-wide studies to compare gene or protein expression under two varied conditions, such as healthy and diseased states. Microarrays consist of glass or silica slides on which probe molecules are covalently attached through surface functionalization. Most commonly, the slides are prepared through the chemisorption of silanes to silica...
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...
The DNA Helix
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...
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...
DNA Structure
DNA has a double-helix structure. The...

