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三丙二酸富勒烯对DNA限制性内切酶和Taq DNA聚合酶活性的抑制作用 被引量:4

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摘要 采用具有HindⅢ和EcoRⅠ单一酶切位点的pEGFP-N1超螺旋型质粒为底物,检测三丙二酸富勒烯(trimalonic acid C60,TMA C60)对DNA限制性酶切反应的作用.同时以该质粒为模板,测定TMA C60对Taq DNA聚合酶催化的聚合酶链式反应(polymerase chain reaction,PCR)的影响.酶切产物与PCR扩增产物均通过琼脂糖凝胶电泳来显示.实验发现,在质粒酶切体系或PCR体系中添加TMA C60后,酶切或扩增产物的生成量均显著减少.TMA C60的作用存在浓度依赖性,对HindⅢ,EcoRⅠ两种酶切反应和PCR的半抑制浓度IC50值分别为16.3,6.0,6.0μmol/L.两种活性氧清除剂L-抗坏血酸-2-磷酸酯镁和叠氮化钠在浓度为2~10mmol/L时,不能拮抗TMA C60对PCR和两种酶切反应的抑制作用.但是,在PCR体系中增加Taq DNA聚合酶能够拮抗TMA C60的作用.这些结果表明,TMA C60能够抑制上述3种DNA代谢相关酶的活性,其作用可能与活性氧无关.
出处 《科学通报》 EI CAS CSCD 北大核心 2007年第4期399-403,共5页 Chinese Science Bulletin
基金 高等学校博士学科点专项科研基金(编号:20030007011) 北京理工大学基础研究基金(编号:000Y06)资助项目
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参考文献32

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同被引文献80

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