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一个不匹配的选择性双功能罗 - 俄勒冈绿色合物:一种光探针用于不匹配的DNA
Brian M Zeglis1, Jacqueline K Barton
1Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, USA.
Journal of the American Chemical Society
|April 28, 2006
概括
一种新型的光金属接器结合剂可以选择性地检测DNA不匹配. 它的光在结合不匹配的DNA时显著增加,使得目标DNA骨干分裂成为可能.
科学领域:
- 生物结合化学 生物结合化学
- 分子生物学分子生物学
- DNA损伤和修复的过程
背景情况:
- 基因基因不匹配对遗传不稳定性和疾病至关重要.
- 开发用于DNA不匹配的选择性探针对于诊断和治疗至关重要.
- 金属间接器具有独特的DNA结合和功能化特性.
研究的目的:
- 为了合成和表征一种新的光金属接器.
- 为了研究结合物的选择性结合和光反应对DNA基因不匹配.
- 为了评估结合体在不匹配位置的DNA裂变的潜力.
主要方法:
- 一个Rh(III) 金属间隔器与有机光体结合的合成.
- 对光变化的光谱分析在与匹配和不匹配的DNA结合时发生变化.
- 化聚烯胺凝电泳 (PAGE) 来评估DNA结合亲和力和裂变.
- 32P标记的寡核酸,用于在结合和裂解试验中的敏感检测.
主要成果:
- 结合体在溶液中呈现灭的光,并且由于离子配对而与匹配的DNA相匹配.
- 在与不匹配的DNA结合时观察到>300%的光增强.
- 确认了对不匹配的DNA的选择性结合,结合亲和力为6 x 10^5 M^-1.
- 对结合结合的不匹配DNA的辐射导致与不匹配相邻的DNA骨干分裂.
结论:
- 开发的光金属接器结合剂作为DNA基基不匹配的选择性传感器.
- 光启动机制为DNA异常提供了一种敏感的检测方法.
- 结合体在不匹配的部位分裂DNA的能力表明,在向基因疗法或分子外科手术中具有潜在的应用.
相关概念视频
Labeling DNA Probes
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...
Reporter Genes
Reporter genes are a type of protein-coding gene that are often tagged to a gene of interest. Once inside a target cell, reporter genes usually produce visually identifiable characteristics like fluorescence and luminescence when expressed along with the gene of interest. Thus, reporter genes “report” the presence or absence of genes of interest in an organism, determine the gene expression pattern, or track the physical location of a DNA segment or protein in the cell.
Commonly used reporter...
Commonly used reporter...

