相关实验视频
Updated: May 2, 2026

08:51
Monitoring Protein Adsorption with Solid-state Nanopores
Published on: December 2, 2011
13.6K
纳米孔映射出单个DNA分子中单个位点的酸性质
Drew C Smith1, Christopher A Thomas1, Jonathan M Craig1
1Department of Physics, University of Washington, Seattle, WA 98195, USA.
Nucleic acids research
|June 17, 2024
概括
纳米孔测序现在可以检测聚合物中单个基的质子化状态. 这一突破允许精确的pKa部分的确定,改进了改进的核酸和的测序.
科学领域:
- 生物物理学的生物物理.
- 纳米技术 纳米技术
- 分子生物学分子生物学
背景情况:
- 纳米孔是有效的单分子传感,特别是DNA,RNA和序列.
- 测序非正规基和氨基酸是一个新兴的研究领域.
- 许多非正规基和氨基酸具有接近中性pH的pKa值,使纳米孔分析复杂化.
研究的目的:
- 为了研究纳米孔信号对单个小组的质子化状态的灵敏度.
- 证明纳米孔在聚合物内的特定位点的pKa定位和确定能力.
- 为优化含有近中性pKa值部分的聚合物的测序提供见解.
主要方法:
- 利用MspA纳米孔对离子电流进行测序.
- 采用单链DNA,其中含有单个非正规Z基,pKa近中性 (∼7.8).
- 在各种pH条件下进行实验,观察信号变化.
主要成果:
- 观察到测量离子电流对Z基的质子化状态的显著灵敏度.
- 成功证明了基于纳米孔的定位和pKa确定Z基部分.
- 通过纳米孔技术验证了在聚合物沿线绘制质子化位点的潜力.
结论:
- 纳米孔感应对单个基的质子化状态非常敏感,即使是那些具有近中性pKa的基.
- 这种方法可以精确地绘制聚合物内部的pKa部分.
- 这些发现为增强改性核酸和的纳米孔测序提供了一条途径.
相关概念视频
Labeling DNA Probes
7.7K
DNA probes are fragments of DNA labeled with a reporter tag to enable their detection or purification. The resulting labeled DNA probes can then hybridize to target nucleic acid sequences through complementary base-pairing, and may be used to recover or identify these regions.
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...
7.7K
DNA Microarrays
16.8K
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...
16.8K

