TALEN outperforms Cas9 in editing heterochromatin target sites.

TALEN outperforms Cas9 in editing heterochromatin target sites.
复制标题

DOI:
10.1038/s41467-020-20672-5
复制
发表时间:
2021-01-27
影响因子:
16.6
通讯作者:
Zhao H
Zhao H
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Jain S;Shukla S;Yang C;Zhang M;Fatma Z;Lingamaneni M;Abesteh S;Lane ST;Xiong X;Wang Y;Schroeder CM;Selvin PR;Zhao H

文献摘要

参考文献

被引文献

相似文献

基因组编辑主要依赖于对目标位点的选择性识别。然而,尽管最近取得了进展,基因组编辑蛋白的潜在搜索机制在细胞染色质环境中尚未完全理解。在这里,我们利用活细胞中的单分子成像直接研究CRISPR/Cas9和TALEN的行为。我们对基因组编辑蛋白的单分子成像显示,Cas9在异染色质上的效率低于TALEN,因为Cas9在这些区域的非特异性位点上被局部搜索所阻碍。我们发现,与异染色质区域的Cas9相比,TALEN的编辑效率提高了5倍。总体而言,我们的研究结果表明,Cas9和TALEN使用三维和局部搜索相结合的方法来识别靶点,而局部搜索的纳米级粒度决定了基因组编辑蛋白的编辑结果。综上所述,我们的研究结果表明,在异染色质应用方面,TALEN是一种比Cas9更有效的基因编辑工具。虽然Cas9在常染色质中优于TALENs,但在异染色质区域效率较低。在这里,作者使用单分子成像表明,与TALENs相比,Cas9在这些区域使用的搜索策略效率较低。
Genome editing critically relies on selective recognition of target sites. However, despite recent progress, the underlying search mechanism of genome-editing proteins is not fully understood in the context of cellular chromatin environments. Here, we use single-molecule imaging in live cells to directly study the behavior of CRISPR/Cas9 and TALEN. Our single-molecule imaging of genome-editing proteins reveals that Cas9 is less efficient in heterochromatin than TALEN because Cas9 becomes encumbered by local searches on non-specific sites in these regions. We find up to a fivefold increase in editing efficiency for TALEN compared to Cas9 in heterochromatin regions. Overall, our results show that Cas9 and TALEN use a combination of 3-D and local searches to identify target sites, and the nanoscopic granularity of local search determines the editing outcomes of the genome-editing proteins. Taken together, our results suggest that TALEN is a more efficient gene-editing tool than Cas9 for applications in heterochromatin. While Cas9 outperforms TALENs in euchromatin, it is less efficient in heterochromatic regions. Here the authors, using single-molecule imaging, show that Cas9 uses a less efficient search strategy compared to TALENs in these regions.
DOI: 10.1126/science.1141967
发表时间: 2007-05-25
期刊: SCIENCE
影响因子: 56.9
作者:
Elf, Johan;Li, Gene-Wei;Xie, X. Sunney
通讯作者: Xie, X. Sunney
DOI: 10.1371/journal.pone.0078745
发表时间: 2013
期刊: PloS one
影响因子: 3.7
作者:
Stagge F;Mitronova GY;Belov VN;Wurm CA;Jakobs S
通讯作者: Jakobs S
DOI: 10.1016/j.tibtech.2013.04.004
发表时间: 2013-07
影响因子: 17.3
作者:
Gaj, Thomas;Gersbach, Charles A.;Barbas, Carlos F., III
通讯作者: Barbas, Carlos F., III
DOI: 10.1126/science.aac6572
发表时间: 2015-11-13
期刊: SCIENCE
影响因子: 56.9
作者:
Knight, Spencer C.;Xie, Liangqi;Tjian, Robert
通讯作者: Tjian, Robert
DOI: 10.1126/science.1225829
发表时间: 2012-08-17
期刊: SCIENCE
影响因子: 56.9
作者:
Jinek, Martin;Chylinski, Krzysztof;Charpentier, Emmanuelle
通讯作者: Charpentier, Emmanuelle