Structural and mechanistic insights into the inhibition of type I-F CRISPR-Cas system by anti-CRISPR protein AcrIF23.
Structural and mechanistic insights into the inhibition of type I-F CRISPR-Cas system by anti-CRISPR protein AcrIF23.
复制标题
抗crispr蛋白AcrIF23抑制I-F型CRISPR-Cas系统的结构和机制研究
DOI:
10.1016/j.jbc.2022.102124
复制
发表时间:
2022-07
影响因子:
4.8
通讯作者:
Feng, Yue
中科院分区:
文献类型:
--
作者:
Ren, Junhui;Wang, Hao;Yang, Lingguang;Li, Feixue;Wu, Yao;Luo, Zhipu;Chen, Zeliang;Zhang, Yi;Feng, Yue
Prokaryotes evolved clustered regularly interspaced short palindromic repeats (CRISPR) and CRISPR-associated (Cas) proteins as a kind of adaptive immune defense against mobile genetic elements including harmful phages. To counteract this defense, many mobile genetic elements in turn encode anti-CRISPR proteins (Acrs) to inactivate the CRISPR-Cas system. While multiple mechanisms of Acrs have been uncovered, it remains unknown whether other mechanisms are utilized by uncharacterized Acrs. Here, we report a novel mechanism adopted by recently identified AcrIF23. We show that AcrIF23 interacts with the Cas2/3 helicase-nuclease in the type I-F CRISPR-Cas system, similar to AcrIF3. The structure of AcrIF23 demonstrated a novel fold and structure-based mutagenesis identified a surface region of AcrIF23 involved in both Cas2/3-binding and its inhibition capacity. Unlike AcrIF3, however, we found AcrIF23 only potently inhibits the DNA cleavage activity of Cas2/3 but does not hinder the recruitment of Cas2/3 to the CRISPR RNA-guided surveillance complex (the Csy complex). Also, in contrast to AcrIF3 which hinders substrate DNA recognition by Cas2/3, we show AcrIF23 promotes DNA binding to Cas2/3. Taken together, our study identifies a novel anti-CRISPR mechanism used by AcrIF23 and highlights the diverse mechanisms adopted by Acrs.
登录
查看更多内容
影响因子:
64.8
作者:
Bondy-Denomy J;Garcia B;Strum S;Du M;Rollins MF;Hidalgo-Reyes Y;Wiedenheft B;Maxwell KL;Davidson AR
通讯作者:
Davidson AR
DOI:
10.1073/pnas.1616395114
发表时间:
2017-06-27
影响因子:
11.1
作者:
Rollins, MaryClare F.;Chowdhury, Saikat;Wiedenheft, Blake
通讯作者:
Wiedenheft, Blake
影响因子:
16.6
作者:
Pinilla-Redondo R;Shehreen S;Marino ND;Fagerlund RD;Brown CM;Sørensen SJ;Fineran PC;Bondy-Denomy J
通讯作者:
Bondy-Denomy J
影响因子:
4.6
作者:
Luo Z
通讯作者:
Luo Z
影响因子:
16
作者:
Niu, Yiying;Yang, Lingguang;Feng, Yue
通讯作者:
Feng, Yue