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Updated: Jul 6, 2025

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基于FAM标签大小分离的捕获 - - 通过指数式丰富用于具有高特异性的固醇胺结合性aptamers的连接体的系统演化

Mengyao Zheng^1,2, Jin Ye¹, Hongmei Liu²

¹College of Food Science and Engineering, Henan University of Technology, Zhengzhou 450001, China.

Analytical chemistry

|January 4, 2024

概括

研究人员开发了一种新型的aptamer用于Sterigmatocystin (ST),这是一个难以准的毒素. 这种新型的体体表现出高亲和度和特异性,为改进的ST检测方法铺平了道路.

科学领域:

生物化学生物化学
分子生物学分子生物学
分析化学分析化学

背景情况:

斯特里格马托西斯 (ST) 是一种毒素,由于其水不溶性和很少的活性部位,报告的体数量有限.
传统的aptamer查方法面临的挑战是像ST这样的小,疏水分子.

研究的目的:

开发一种高亲和度和特定的aptamer,用于Sterigmatocystin (ST).
建立一个新的ST检测方法的基础.

主要方法:

通过指数式丰富 (SELEX) 与分子激活相结合,将FAM标签大小分离纳入连接体的系统演化.
利用定量聚合酶连锁反应 (qPCR) 进行选监测和分子对接以预测结合部位.
经过循环二元化 (CD) 和异热定位热量计 (ITC) 验证的阿普坦-标相互作用.

主要成果:

开发了对ST的H Seq02合体,其解离常数 (Kd) 为25.3nM.
构建了一个aptamer-affinity列,容量约为80 ng,显示出优越的特异性,以抗体为基础的列.
分子对接模拟预测了结合点,阐明了增强的特异性.

结论:

这种新型的阿巴酶H Seq02对固囊素具有很高的亲和力和特异性.
开发的aptamer-affinity列为ST检测的现有方法提供了一个有希望的替代方案.
这项研究为开发先进的ST检测技术提供了关键基础.

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