相关实验视频
Updated: Feb 28, 2026
16:24
Analyzing and Building Nucleic Acid Structures with 3DNA
Published on: April 26, 2013
21.3K
核酸基类FRET的完整序列灵活性
Moa S Wranne1, Anders Foller Füchtbauer1, Blaise Dumat1
1Department of Chemistry and Chemical Engineering/Chemistry and Biochemistry, Chalmers University of Technology , Gothenburg S-41296, Sweden.
Journal of the American Chemical Society
|June 15, 2017
概括
研究人员开发了Förster共振能量转移 (FRET) 的新光腺类型,以精确地绘制DNA结构和动态. 这些明亮,多功能探测器在结构研究中增强分辨率,并补充现有的生物物理技术.
科学领域:
- 生物物理
- 分子生物学
- 结构生物学
背景情况:
- 用光基相应物进行的福斯特共振能量转移 (FRET) 提供了高分辨率的核酸结构和动态数据.
- 现有的FRET方法提供了有价值的见解,但可以扩展以获得更大的多功能性.
研究的目的:
- 引入一种新型的氨酸模拟FRET对,用于DNA中的增强基基FRET测量.
- 证明这些类似物在确定DNA结构和构造变化的有用性.
主要方法:
- 用胺保护的四环2'-脱氧氨基类似物 (qAN1作为捐赠物,qAnitro作为接受物) 的合成
- 使用标准合成协议将这些类似物纳入DNA.
- 应用FRET测量来研究DNA结构和结合因子的变化.
主要成果:
- 合成的腺素类型具有高量子产量和亮度,是迄今为止DNA中最亮的腺素类型.
- qAN1/qAnitroFRET对可以在延长的DNA长度上进行准确的测量 (B-DNA超过一次).
- FRET效率对距离和方向高度敏感,在结构确定中显著提高分辨率,正如在netropsin的研究中显示的那样.
结论:
- 新的氨酸模拟FRET-pair扩大了基基FRET用于核酸结构分析的能力.
- 开发的类似物提供了增强的亮度和多功能性,补充了现有的基于细胞因子的FRET对进行全面的DNA分析.
- 这项工作有助于在DNA复合体中的所有序列位置之间进行FRET测量,从而实现详细的结构和动态研究.
相关概念视频
02:27DNA Base Pairing
34.4K
Erwin Chargaff’s rules on DNA equivalence paved the way for the discovery of base pairing in DNA. Chargaff’s rules state that in a double-stranded DNA molecule,
34.4K
02:27DNA Base Pairing
33.1K
33.1K
01:05Maxam-Gilbert Sequencing
13.3K
In the same year as the discovery of the Sanger sequencing method, another group of scientists, Allan Maxam and Walter Gilbert, demonstrated their chemical-cleavage method for DNA sequencing. The Maxam-Gilbert method relies on using different chemicals that can cleave the DNA sequence at specific sites, the separation of resulting DNA fragments of variable size using electrophoresis, and deciphering the DNA sequence from the resulting gel bands.
Challenges of the Maxam-Gilbert Method
The...
Challenges of the Maxam-Gilbert Method
The...
13.3K
03:00Next-generation Sequencing
99.5K
The first human genome sequencing project cost $2.7 billion and was declared complete in 2003, after 15 years of international cooperation and collaboration between several research teams and funding agencies. Today, with the advent of next-generation sequencing technologies, the cost and time of sequencing a human genome have dropped over 100 fold.
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features....
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features....
99.5K
01:57Sanger Sequencing
776.0K
DNA sequencing is a fundamental technique that is routinely used in the biological sciences. This method can be applied to a range of questions at different scales - from the sequencing of a cloned DNA fragment or the study of a mutation in a gene up to whole-genome sequencing. However, despite the widespread use of sequencing today, it was not until 1977 that Fredrick Sanger and his collaborators developed the chain-termination method to decode DNA sequences. It relies on the separation of a...
776.0K
01:25Nucleic Acid Structure
9.7K
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...
9.7K