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基于分子信标实时监测大肠杆菌DNA连接酶催化的DNA连接过程 被引量:5

Real-time Visualization of Ligation Reaction Catalyzed by E.coli DNA Ligase Based on Molecular Beacon
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摘要 报道了一种对 DNA连接过程进行实时监测的方法 ,利用分子信标核酸探针作为 DNA连接反应的模板和检测探针 ,实时监测了 E.coli DNA连接酶催化的 DNA连接反应 ,克服了传统的凝胶电泳技术操作复杂、周期长及无法实时监测 DNA连接过程的缺点 ,为核酸连接过程的实时监测和连接酶催化机理的研究提供了更为丰富的信息 .在此基础上 ,发展了一种快速、准确测定 E.coli DNA连接酶的方法 ,线性响应范围为 4.0× 1 0 -6~ 2 .0× 1 0 -4U /μL,检测下限为 4.0× 1 0 -6U/μL. Nucleic acids ligation is a crucial step in replication and repair of DNA and in genetic recombination. Researches on DNA ligation have been generally based on gel electrophoresis and autoradiography in the past, which include complex work and are time-consuming. In this paper, a novel approach was developed for real-time monitoring of DNA ligation process. By using this approach, DNA ligation process can be monitored in real-time providing abundant, successive, dynamic and real-time data, which is of great importance for the mechanistic studies and dynamics research of DNA ligation. Ulteriorly, a qualification assay method for the ligase is developed, with a linear range from 4.0×10 -6 to 2.0×10 -4 U/μL and a detection limit of 4.0×10 -6 U/μL.
出处 《高等学校化学学报》 SCIE EI CAS CSCD 北大核心 2003年第10期1761-1764,共4页 Chemical Journal of Chinese Universities
基金 国家重点基础研究发展计划 (批准号 :2 0 0 2 CB13 10 0 ) 科学技术部基础研究重大项目前期研究专项基金 (批准号 :2 0 0 1-5 1) 国家自然科学基金重点项目 (批准号 :2 0 13 5 0 10 ) 教育部重大项目基金 (批准号 :2 0 0 0 -15 6) 海外青年学者合作研究基金 (?
关键词 分子信标 实时监测 大肠杆菌 DNA 连接酶 催化 核酸连接 E.coli DNA ligase DNA ligation Molecular beacon Real-time monitoring
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共引文献8

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