超分子可卡因 - 胺体复合体激活生物催化级联
Ronit Freeman1, Etery Sharon, Ran Tel-Vered
1Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.
Journal of the American Chemical Society
|March 25, 2009
概括
这项研究介绍了用于可卡因检测的基于aptamer的新型生物传感器. 这些系统利用酶级联来产生可检测的信号,以响应可卡因结合,为诊断提供生物模拟方法.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 生物传感器技术技术
背景情况:
- 亚胺是核酸序列,对目标分子具有很高的特异性.
- 酶级联为生物传感应用提供信号放大.
- 仿生系统的目的是为了技术应用而复制生物功能.
研究的目的:
- 开发用于可卡因检测的基于aptamer的新型生物传感器.
- 为可卡因特定的信号生成而设计酶-胺酶结合体.
- 探索系统生物学应用的仿生原型.
主要方法:
- 一个抗可卡因胺体的碎片化成两个功能性核酸.
- 核酸 (1) 与氨基乙烯尼古丁胺胺氨基二核酸 (氨基-NAD+) 或黄过氧化酶 (HRP) 的结合.
- 核酸 (2) 通过酒精脱酶 (AlcDH) 或葡萄糖氧化酶 (GOx) 的功能化.
- 在可卡因的存在下形成超分子复合体.
- 激活生物催化级联用于信号生成.
主要成果:
- 形成一个超分子NAD+/AlcDH/可卡因-阿普坦综合体,在可卡因的存在下激活乙醇氧化.
- 形成一个GOx/HRP/可卡因-阿普坦综合体,激活葡萄糖氧化级联,产生H2O2.2.
- 由葡萄糖氧化产生的H2O2激活了ABTS的HRP催化氧化.
- 证明了两种不同的生物催化系统的可卡因依赖激活.
结论:
- 开发了用于可卡因检测的基于aptamer的新型生物传感器系统.
- 在可卡因结合后激活生物催化级联的工程酶-阿巴特马结合物.
- 这些系统作为仿生原型,在系统生物学和诊断中具有潜在的应用.
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