Structures and Strategies of Anti-CRISPR-Mediated Immune Suppression.
Structures and Strategies of Anti-CRISPR-Mediated Immune Suppression.
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DOI:
10.1146/annurev-micro-020518-120107
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发表时间:
2020-09-08
影响因子:
10.5
通讯作者:
Wiedenheft B
中科院分区:
文献类型:
--
作者:
Wiegand T;Karambelkar S;Bondy-Denomy J;Wiedenheft B
Nearly fifty protein families have been identified that inhibit CRISPR (Clustered Regularly Interspaced Short Palindromic Repeats)-Cas mediated adaptive immune systems. Here, we analyze the available anti-CRISPR (Acr) structures and describe common themes and unique mechanisms of stoichiometric and enzymatic suppressors of CRISPR-Cas. Stoichiometric inhibitors sterically block interactions with DNA or prevent conformational changes that recruit or activate Cas nucleases, whereas enzymatic inhibitors covalently modify Cas proteins or cleave the CRISPR RNA. Here, we discuss some of the trade-offs associated with each of these strategies and highlight mechanistic insights revealed by atomic-resolution structures of Acrs.
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通讯作者:
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