Programmable autonomous synthesis of single-stranded DNA.

Programmable autonomous synthesis of single-stranded DNA.
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单链DNA的可编程自主合成。

DOI:
10.1038/nchem.2872
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发表时间:
2018-03
期刊:
影响因子:
21.8
通讯作者:
Yin P
Yin P
中科院分区:
化学1区
文献类型:
--
作者:
Kishi JY;Schaus TE;Gopalkrishnan N;Xuan F;Yin P

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DNA在生物学、纳米技术和生物技术中发挥着不同的功能作用,但目前自主合成任意单链DNA的方法有限。在这里,我们介绍了引物交换反应(PER)级联的概念,它按照规定的反应路径生长出具有用户指定序列的新生单链DNA。PER合成以可编程、自主、原位和环境响应的方式进行,为设计具有广泛传感、监控、记录、信号处理和致动能力的分子电路和设备提供了平台。我们在实验中展示了一种纳米设备,它将触发RNA的检测转化为产生降解独立RNA底物的DNAzyme,一个信号放大器,它只在特定RNA信号存在的情况下有条件地合成长荧光链,分子计算电路,它评估RNA输入的逻辑(与,或,非)组合,以及一个临时分子事件记录器,它在PER记录中记录不同的RNA输入被顺序检测的顺序。
DNA performs diverse functional roles in biology, nanotechnology, and biotechnology, but current methods for autonomously synthesizing arbitrary single-stranded DNA are limited. Here, we introduce the concept of Primer Exchange Reaction (PER) cascades, which grow nascent single-stranded DNA with user-specified sequences following prescribed reaction pathways. PER synthesis happens in a programmable, autonomous, in situ, and environmentally responsive fashion, providing a platform for engineering molecular circuits and devices with a wide range of sensing, monitoring, recording, signal processing, and actuation capabilities. We experimentally demonstrate a nanodevice that transduces the detection of a trigger RNA into the production of a DNAzyme that degrades an independent RNA substrate, a signal amplifier that conditionally synthesizes long fluorescent strands only in the presence of a particular RNA signal, molecular computing circuits that evaluate logic (AND, OR, NOT) combinations of RNA inputs, and a temporal molecular event recorder that records in the PER transcript the order in which distinct RNA inputs are sequentially detected.
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