The Cucurbit[7]Uril-Based Supramolecular Chemistry for Reversible B/Z-DNA Transition.

The Cucurbit[7]Uril-Based Supramolecular Chemistry for Reversible B/Z-DNA Transition.
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基于葫芦[7]Uril的可逆B/Z-DNA转变的超分子化学

DOI:
10.1002/advs.201800231
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发表时间:
2018-07
期刊:
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
影响因子:
--
通讯作者:
Zhou X
Zhou X
中科院分区:
其他
文献类型:
--
作者:
Wang SR;Wang JQ;Xu GH;Wei L;Fu BS;Wu LY;Song YY;Yang XR;Li C;Liu SM;Zhou X

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Z-DNA是一种左旋螺旋结构,具有生物活性,可能与转录和基因组稳定性有关。直到最近,在生理条件下控制B/Z-DNA转换仍然是一个巨大的挑战。目前的研究是首次使用基于葫芦醇的超分子方法可逆地控制B/Z-DNA转变。结果表明,葫芦醇能包裹中心丁二胺[HN(CH2)4NH],并将精胺引起的Z-DNA逆转为B-DNA。随后用1-金刚烷胺处理会分解葫芦醇/精胺复合体,并很容易诱导B-重新转化为Z-DNA。用不同的独立方法明确地证明了DNA构象的变化。进一步提供了超分子相互作用参与DNA构象变化的直接证据。因此,这些发现可以开辟一条以可逆方式控制DNA螺旋结构的新途径。
As a left‐handed helical structure, Z‐DNA is biologically active and it may be correlated with transcription and genome stability. Until recently, it remained a significant challenge to control the B/Z‐DNA transition under physiological conditions. The current study represents the first to reversibly control B/Z‐DNA transition using cucurbit[7]uril‐based supramolecular approach. It is demonstrated that cucurbit[7]uril can encapsulate the central butanediamine moiety [HN(CH2)4NH] and reverses Z‐DNA caused by spermine back to B‐DNA. The subsequent treatment with 1‐adamantanamine disassembles the cucurbit[7]uril/spermine complex and readily induces reconversion of B‐ into Z‐DNA. The DNA conformational change is unequivocally demonstrated using different independent methods. Direct evidence for supramolecular interactions involved in DNA conformational changes is further provided. These findings can therefore open a new route to control DNA helical structure in a reversible way.
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