rEXPAR: An Isothermal Amplification Scheme That Is Robust to Autocatalytic Parasites
rEXPAR: An Isothermal Amplification Scheme That Is Robust to Autocatalytic Parasites
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rEXPAR:一种对自催化寄生虫具有鲁棒性的等温扩增方案
DOI:
10.1101/518118
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发表时间:
2019
期刊:
影响因子:
2.9
通讯作者:
André Estevez-Torres
中科院分区:
文献类型:
--
作者:
Georg Urtel;Jean-Christophe Galas;André Estevez-Torres
In the absence of DNA, a solution containing the four deoxynucleotidetriphosphates (dNTPs), a DNA polymerase, and a nicking enzyme generates a self-replicating mixture of DNA species called parasite. Parasites are problematic in template-based isothermal amplification schemes such as EXPAR as well as in related molecular programming approaches, such as the PEN DNA toolbox. Here we show that using a nicking enzyme with only three letters (C, G, T) in the top strand of its recognition site, such as Nb.BssSI, allows us to change the sequence design of EXPAR templates in a way that prevents the formation of parasites when dATP is removed from the solution. This method allows us to make the EXPAR reaction robust to parasite contamination, a common feature in the laboratory, while keeping it compatible with PEN programs, which we demonstrate by engineering a parasite-proof bistable reaction network.
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DOI:
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发表时间:
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期刊:
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