Intra-Molecular Homologous Recombination of Scarless Plasmid
Intra-Molecular Homologous Recombination of Scarless Plasmid
复制标题
无疤质粒的分子内同源重组
DOI:
10.3390/ijms21051697
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发表时间:
2020-03
影响因子:
5.6
通讯作者:
Liu Liangwei
中科院分区:
文献类型:
--
作者:
Liang Yaping;Zhang Yu;Liu Liangwei
Although many methods have been reported, plasmid construction compromises transformant efficiency (number of transformants per ng of DNAs) with plasmid accuracy (rate of scarless plasmids). An efficient method is two-step PCR serving DNA amplification. An accurate method is ExnaseII cloning serving homology recombination (HR). We combine DNA amplification and HR to develop an intra-molecular HR by amplifying plasmid DNAs to contain homology 5′- and 3′-terminus and recombining the plasmid DNAs in vitro. An example was to construct plasmid pET20b-AdD. The generality was checked by constructing plasmid pET21a-AdD and pET22b-AdD in parallel. The DNAs having 30-bp homology arms were optimal for intra-molecular HR, and transformation of which created 14.2 transformants/ng and 90% scarless plasmids, more than the two-step PCR and the ExnaseII cloning. Transformant efficiency correlated with the component of nicked circular plasmid DNAs of HR products, indicating nick modification in vivo leads to scar plasmids.
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影响因子:
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Geiser, M;Cèbe, R;Schmitz, R
通讯作者:
Schmitz, R
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Ulrich A;Andersen KR;Schwartz TU
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Schwartz TU
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