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
中科院分区:
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
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.
登录
查看更多内容
影响因子:
56.9
作者:
Elf, Johan;Li, Gene-Wei;Xie, X. Sunney
通讯作者:
Xie, X. Sunney
影响因子:
3.7
作者:
Stagge F;Mitronova GY;Belov VN;Wurm CA;Jakobs S
通讯作者:
Jakobs S
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
影响因子:
56.9
作者:
Knight, Spencer C.;Xie, Liangqi;Tjian, Robert
通讯作者:
Tjian, Robert
影响因子:
56.9
作者:
Jinek, Martin;Chylinski, Krzysztof;Charpentier, Emmanuelle
通讯作者:
Charpentier, Emmanuelle