On the binding of cationic, water-soluble conjugated polymers to DNA: electrostatic and hydrophobic interactions.

On the binding of cationic, water-soluble conjugated polymers to DNA: electrostatic and hydrophobic interactions.
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DOI:
10.1021/ja908890q
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发表时间:
2010-02-03
影响因子:
15
通讯作者:
Plaxco, Kevin W.
Plaxco, Kevin W.
中科院分区:
化学1区
文献类型:
--
作者:
Xia, Fan;Zuo, Xiaolei;Yang, Renqiang;Xiao, Yi;Kang, Di;Vallee-Belisle, Alexis;Gong, Xiong;Heeger, Alan J.;Plaxco, Kevin W.

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水溶性阳离子共轭聚合物与单链 DNA 的结合亲和力高于与双链或其他“折叠”DNA 的结合力。这种更强的结合是由于单链 DNA 具有更大的疏水性。当疏水相互作用的强度降低时,静电引力成为调节水溶性共轭聚合物与DNA之间结合的重要相互作用。阳离子共轭聚合物与各种形式的DNA(分子信标及其开放状态;单链DNA和双链DNA以及单链DNA和复杂的DNA折叠)之间的不同亲和力可用于设计各种生物传感器。
Water-soluble, cationic conjugated polymer binds single-stranded DNA with higher affinity than it binds double-stranded or otherwise “folded” DNA. This stronger binding results from the greater hydrophobicity of single-stranded DNA. Upon reducing the strength of the hydrophobic interactions, the electrostatic attraction becomes the important interaction that regulates the binding between the water-soluble conjugated polymer and DNA. The different affinities between the cationic conjugated polymer and various forms of DNA (molecular beacons and its open state; single-stranded DNA and double-stranded DNA and single-stranded DNA and complex DNA folds) can be used to design a variety of biosensors.
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