Orthogonal Cas9-Cas9 chimeras provide a versatile platform for genome editing.

Orthogonal Cas9-Cas9 chimeras provide a versatile platform for genome editing.
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DOI:
10.1038/s41467-018-07310-x
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发表时间:
2018-11-19
影响因子:
16.6
通讯作者:
Wolfe SA
Wolfe SA
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Bolukbasi MF;Liu P;Luk K;Kwok SF;Gupta A;Amrani N;Sontheimer EJ;Zhu LJ;Wolfe SA

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The development of robust, versatile and accurate toolsets is critical to facilitate therapeutic genome editing applications. Here we establish RNA-programmable Cas9-Cas9 chimeras, in single- and dual-nuclease formats, as versatile genome engineering systems. In both of these formats, Cas9-Cas9 fusions display an expanded targeting repertoire and achieve highly specific genome editing. Dual-nuclease Cas9-Cas9 chimeras have distinct advantages over monomeric Cas9s including higher target site activity and the generation of predictable precise deletion products between their target sites. At a therapeutically relevant site within the BCL11A erythroid enhancer, Cas9-Cas9 nucleases produced precise deletions that comprised up to 97% of all sequence alterations. Thus Cas9-Cas9 chimeras represent an important tool that could be particularly valuable for therapeutic genome editing applications where a precise cleavage position and defined sequence end products are desirable. Therapeutic genome engineering relies on the development of reliable, robust and versatile tools. Here the authors develop Cas9-Cas9 chimeras with high target site activity that generate predictable deletions.
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