Enzymatic digestion of single DNA molecules anchored on nanogold-modified surfaces.

Enzymatic digestion of single DNA molecules anchored on nanogold-modified surfaces.
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DOI:
10.1007/s11671-009-9350-6
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发表时间:
2009-05-31
影响因子:
--
通讯作者:
Li B
Li B
中科院分区:
材料科学3区
文献类型:
--
作者:
Lü J;Ye M;Duan N;Li B

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要在单分子水平上研究酶-DNA相互作用,必须仔细考虑表面的附着点和邻近环境,以便它们不会损害被研究样品的结构信息和生物学特性。本工作证明了酶消化附着在纳米颗粒修饰表面上的单个DNA分子的可行性。纳米金通过静电作用将DNA连接到云母表面,获得了对DNA长度和形貌影响较小的有利条件,并为DNA的活动创造了合适的环境。我们证明,通过使用Dip-Pen纳米光刻技术,附着在修饰云母表面的单个DNA分子可以有效地被DNase I消化。
To study enzyme–DNA interactions at single molecular level, both the attachment points and the immediate surroundings of surfaces must be carefully considered such that they do not compromise the structural information and biological properties of the sample under investigation. The present work demonstrates the feasibility of enzymatic digestion of single DNA molecules attached to nanoparticle-modified surfaces. With Nanogold linking DNA to the mica surface by electrostatic interactions, advantageous conditions with fewer effects on the length and topography of DNA are obtained, and an appropriate environment for the activities of DNA is created. We demonstrate that by using Dip-Pen Nanolithography, individual DNA molecules attached to modified mica surfaces can be efficiently digested by DNase I.
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