由L-DNA和可点击的L-配置的尿素制成的抗细胞波长转移分子信标
Fabian Lang1, Franziska Rönicke1, Hans-Achim Wagenknecht1
1Institute of Organic Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany. Wagenknecht@kit.edu.
Organic & biomolecular chemistry
|May 21, 2024
概括
新型L-DNA分子信标表现出增强的稳定性和光对比度,在细胞溶解物中表现优于D-DNA版本. 这些L-DNA信标显示出作为细胞内温度计的前景.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 纳米技术纳米技术
背景情况:
- 分子信标是基于DNA的传感器,对于检测核酸至关重要.
- 现有的分子信标经常在生物环境中面临稳定性问题.
- 开发用于细胞内应用的强大的信标仍然是一个挑战.
研究的目的:
- 合成和描述由L-DNA构建的波长转移分子信标.
- 评估L-DNA信标在细胞溶解物中的稳定性和性能,与D-DNA信标相比.
- 评估L-DNA信标作为细胞内温度计的潜力.
主要方法:
- 合成2'-O-propargyl-L-uridine作为染料的可点击.
- 使用点击化学制备四个可点击的分子信标.
- 用Cy3和Cy5染料进行修改,用于福斯特共振能量转移 (FRET) 分析.
- 温度依赖的光测量和细胞溶解物稳定性测试.
- 对焦显微镜用于细胞内验证.
主要成果:
- 成功合成了用Cy3和Cy5染料组成FRET对的L-DNA分子信标.
- 显示了鲜明的红色 (关闭) 和绿色 (开放) 光读数.
- 确定了两个具有卓越光对比度的L-DNA信标.
- L-DNA信标在细胞解质和热循环中表现出了显著的稳定性.
- D-DNA信标在细胞溶解酸中表现出减少的光对比,表明不稳定.
结论:
- 与它们的D-DNA对应物相比,L-DNA分子信标提供了卓越的稳定性和光对比度.
- 开发的L-DNA信标在复杂的生物环境中如细胞溶解物中具有强大性能.
- 这些发现凸显了L-DNA分子信标作为可靠的细胞内温度计在各种应用中的潜力.
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