在Morpholino-DNA表面杂交中的分子机制
Ping Gong1, Kang Wang, Yatao Liu
1Seventh Sense Biosystems Inc., 101 Binney Street, Cambridge, Massachusetts 02142, USA.
Journal of the American Chemical Society
|June 25, 2010
概括
莫尔福利诺斯 (MOs),无电荷核酸模仿,在表面杂交中比DNA具有明显的优势. MO-DNA相互作用对离子强度和表面拥挤不那么敏感,改善了诊断信号检测.
科学领域:
- 生物化学 生物化学
- 材料科学 材料科学 材料科学
- 分子生物学分子生物学
背景情况:
- 合成核酸模仿剂可以被设计为与DNA/RNA的特定杂交.
- 增强的特异性和亲和力对于诊断应用至关重要.
- 形态分子 (MOs) 是无电荷的核酸模仿物,具有改善杂交的潜力.
研究的目的:
- 为了比较Morpholino-DNA (MO-DNA) 的杂交行为与DNA-DNA相互作用.
- 在溶液和表面上研究这些相互作用.
- 评估离子强度和表面条件对杂交的影响.
主要方法:
- 基于溶液的混合化试验.
- 用固定探头进行基于表面的杂交测试.
- 在不同的离子强度和探头覆盖面下对杂交的分析.
主要成果:
- 在溶液中的MO-DNA杂交是独立于对等离子度的,与DNA-DNA不同.
- 在表面上,MO-DNA和DNA-DNA杂交都取决于离子强度,但行为不同.
- 在低离子强度下,MO-DNA杂交显示出动力限制,而DNA-DNA则受到多南潜力的限制.
- 在高离子强度下,MO-DNA杂交受探头覆盖范围的影响要小于DNA-DNA.
结论:
- 与DNA相比,Morpholinos表现出独特的杂交特征,特别是在表面上.
- 单层MO的结构模型解释了观察到的杂交行为.
- 像MO和PNA这样的未加电的DNA类似物在诊断中显示出表面杂交应用的前景.
相关概念视频
Southern Blot
Agarose gel electrophoresis is very useful in separating DNA fragments by size. Running a DNA ladder containing fragments of the known length alongside the sample helps determine the approximate length of the sample DNA fragments. However, additional steps are needed to verify the sequence identity of the sample DNA fragments.
Denatured DNA fragments must be transferred onto a carrier membrane from the gel to make it accessible to a probe - a small ssDNA fragment complementary to the target DNA...
Denatured DNA fragments must be transferred onto a carrier membrane from the gel to make it accessible to a probe - a small ssDNA fragment complementary to the target DNA...
In-situ Hybridization
In situ hybridization (ISH) is a technique used to detect and localize specific DNA or RNA molecules in cells, tissue, or tissue sections using a labeled probe. The technique was first used in 1969 for the investigation of nucleic acids. It is currently an essential tool in scientific research and clinical settings, especially for diagnostic purposes.
Types of probes and labels
A probe is a complementary strand of DNA or RNA that binds to corresponding nucleotide sequences in a cell. Many...
Types of probes and labels
A probe is a complementary strand of DNA or RNA that binds to corresponding nucleotide sequences in a cell. Many...
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...


