Cas12a mediates efficient and precise endogenous gene tagging via MITI: microhomology-dependent targeted integrations.
Cas12a mediates efficient and precise endogenous gene tagging via MITI: microhomology-dependent targeted integrations.
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DOI:
10.1007/s00018-019-03396-8
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发表时间:
2020-10
期刊:
影响因子:
--
通讯作者:
Wu S
中科院分区:
文献类型:
--
作者:
Li P;Zhang L;Li Z;Xu C;Du X;Wu S
Efficient exogenous DNA integration can be mediated by Cas9 through the non-homology end-joining pathway. However, such integrations are often imprecise and contain a variety of mutations at the junctions between the external DNA and the genomic loci. Here we describe a microhomology-dependent targeted integration method, designated MITI, for precise site-specific gene insertions. We found that the MITI strategy yielded higher knock-in accuracy than Cas9 HITI for the insertion of external DNA and tagging endogenous genes. Furthermore, in combination with negative selection and four different CrRNAs targeting donor vectors and genome-targeted sites with a CrRNA array, MITI facilitated precise ligation at all junctions. Therefore, our Cas12a-based MITI method increases the repertoire of precision genome engineering approaches and provides a useful tool for various gene editing applications. The online version of this article (10.1007/s00018-019-03396-8) contains supplementary material, which is available to authorized users.
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