Nanomechanical DNA origami 'single-molecule beacons' directly imaged by atomic force microscopy.

Nanomechanical DNA origami 'single-molecule beacons' directly imaged by atomic force microscopy.
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DOI:
10.1038/ncomms1452
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发表时间:
2011-08-23
影响因子:
16.6
通讯作者:
--
中科院分区:
综合性期刊1区
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--
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DNA折纸涉及在短钉合链的帮助下将长单链DNA折叠成设计的结构;这样的结构可以使有用的纳米机械DNA装置的开发成为可能。在这里,我们开发了多功能的传感系统,用于各种化学和生物目标的分子分辨率。我们已经设计了功能性纳米机械DNA折纸装置,可以用作“单分子信标”,并作为捏装置的功能。使用“DNA折纸钳”和“DNA折纸钳”,由两个约170 nm长的杠杆连接在一个支点,各种单分子无机和有机目标,从金属离子到蛋白质,可以使用原子力显微镜通过折纸装置的形状转变进行视觉检测。可以选择适合于感兴趣的目标的任何检测机构,夹紧、拉上拉链或拉开拉链,并使用单个平台与相同混合物中的不同形状的折纸装置正交地使用。DNA折纸涉及将长单链DNA折叠成设计的结构,这可能有助于开发有用的纳米机械DNA设备。在这项研究中,DNA折纸钳和镊子被证明在单分子结合时会发生构象变化。
DNA origami involves the folding of long single-stranded DNA into designed structures with the aid of short staple strands; such structures may enable the development of useful nanomechanical DNA devices. Here we develop versatile sensing systems for a variety of chemical and biological targets at molecular resolution. We have designed functional nanomechanical DNA origami devices that can be used as 'single-molecule beacons', and function as pinching devices. Using 'DNA origami pliers' and 'DNA origami forceps', which consist of two levers ~170 nm long connected at a fulcrum, various single-molecule inorganic and organic targets ranging from metal ions to proteins can be visually detected using atomic force microscopy by a shape transition of the origami devices. Any detection mechanism suitable for the target of interest, pinching, zipping or unzipping, can be chosen and used orthogonally with differently shaped origami devices in the same mixture using a single platform. DNA origami involves the folding of long single-stranded DNA into designed structures that may aid the development of useful nanomechanical DNA devices. In this study, DNA origami pliers and forceps are shown to undergo conformational changes on single-molecule binding.
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