生物技术通报 ›› 2019, Vol. 35 ›› Issue (1): 161-169.doi: 10.13560/j.cnki.biotech.bull.1985.2018-0502

• 技术与方法 • 上一篇    下一篇

末端脱氧核酸转移酶介导的功能核酸生物传感器研究进展

张媛2, 梁嘉慧2, 罗云波2, 田晶晶2, 田洪涛1, 许文涛2   

  1. 1. 河北农业大学食品科技学院,保定 071001;
    2. 农业部农业转基因生物安全评价(食用)重点实验室 中国农业大学食品科学与营养工程学院,北京 100083
  • 收稿日期:2018-05-30 出版日期:2019-01-26 发布日期:2019-01-23
  • 作者简介:张媛,女,硕士,研究方向:功能核酸生物传感器;E-mail:1209478938@qq.com; 田洪涛,男,教授,博士生导师,研究方向:食品生物技术;E-mail:tht631022@163.com
  • 基金资助:
    国家自然科学基金项目(31671922)

Research Progress on Functional Nucleic acid Biosensors Mediated by Terminal Deoxynucleotidyl Transferase

ZHANG Yuan1,2, LIANG Jia-hui2, LUO Yun-bo2, TIAN Jing-jing2, TIAN Hong-tao1, XU Wen-tao2   

  1. 1. College of Food Science and Technology,Agricultural University of Hebei,Baoding 071001;
    2. Key Laboratory of Safety Assessment of Genetically Modified Organism(Food Safety),Ministry of Agriculture of the P. R. China,College of Food Science and Nutritional Engineering,China Agricultural University,Beijing 100083
  • Received:2018-05-30 Published:2019-01-26 Online:2019-01-23

摘要: 末端脱氧核酸转移酶(TdT酶)是一种DNA聚合酶,可以催化脱氧核苷酸结合到DNA分子的3'羟基端,并且该反应无需特定的模板。目前,基于末端脱氧核酸转移酶可对模板核酸链的末端进行延伸这一特性,搭载不同的信号输出及扩增方式,构建了一系列的生物传感技术,如电化学生物传感器、荧光生物传感器、表面离子共振生物传感器等。对各类传感器的基本设计原理和应用进行了阐述。根据TdT酶的性质设计的一系列生物传感器具有简单、快速、廉价、灵敏度高、特异性好等优点,实现了对金属离子、病原体、蛋白质等的检测。最后对TdT酶介导的生物传感器目前的研究现状进行了总结并且对TdT酶未来的发展方向进行了展望。

关键词: 末端脱氧核酸转移酶, 3'羟基, 脱氧核苷酸, 末端延伸, 生物传感器

Abstract: Terminal deoxynucleotidyl transferase(TdT enzyme)is a DNA polymerase that catalyzes the binding of deoxynucleotides to the 3’ hydroxyl end of a DNA molecule,and for which a specific template is not demanded. Currently,based on the characteristics of terminal deoxynucleotidyl transferases that can extend the ends of the template nucleic acid strands and carried on with different signal outputs and amplification methods,a series of biosensing technologies were constructed,such as electrochemical biosensors,fluorescent biosensor,and surface ion resonance biosensors. This article describes the basic design principles and applications of various sensors. A series of biosensors can be designed for the detection of metal ions,pathogens,and proteins according to the properties of TdT enzymes,with the advantages of simplicity,rapidity,low cost,high sensitivity,and fine specificity. At the end of this article,the current research status on TdT-mediated biosensors is summarized and its future development direction is prospected.

Key words: terminal deoxynucleotidyl transferase, 3'-OH, deoxynucleotide, end extension, biosensor