Control of self-assembly of DNA tubules through integration of gold nanoparticles.

Control of self-assembly of DNA tubules through integration of gold nanoparticles.
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DOI:
10.1126/science.1165831
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发表时间:
2009-01-02
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Yan H
Yan H
中科院分区:
其他
文献类型:
--
作者:
Sharma J;Chhabra R;Cheng A;Brownell J;Liu Y;Yan H

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将纳米粒子组装成三维(3D)结构可以更好地控制这些粒子之间或与分子之间的相互作用。已知DNA管可通过多螺旋DNA束结构的自组装或二维DNA瓦片晶格的闭合形成。通过将单链DNA连接到金纳米粒子上,可以形成各种3D结构的纳米管,其形状从堆叠环到单螺旋、双螺旋和嵌套螺旋不等。纳米粒子是活性元素,通过尺寸相关的空间位阻效应控制对特定管构象的偏好。例如,我们可以使用10纳米金纳米粒子控制管组装,使其倾向于形成堆叠环结构。电子断层扫描显示螺旋管中存在左旋手性、双壁管特征以及管之间的构象转变。
The assembly of nanoparticles into three-dimensional (3D) architectures could allow for greater control of the interactions between these particles or with molecules. DNA tubes are known to form through either self-association of multi-helix DNA bundle structures or closing up of 2D DNA tile lattices. By the attachment of single-stranded DNA to gold nanoparticles, nanotubes of various 3D architectures can form, ranging in shape from stacked rings to single spirals, double spirals, and nested spirals. The nanoparticles are active elements that control the preference for specific tube conformations through size-dependent steric repulsion effects. For example, we can control the tube assembly to favor stacked-ring structures using 10-nanometer gold nanoparticles. Electron tomography revealed a left-handed chirality in the spiral tubes, double-wall tube features, and conformational transitions between tubes.
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