Inhibition Mechanism of an Anti-CRISPR Suppressor AcrIIA4 Targeting SpyCas9.
Inhibition Mechanism of an Anti-CRISPR Suppressor AcrIIA4 Targeting SpyCas9.
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DOI:
10.1016/j.molcel.2017.05.024
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发表时间:
2017-07-06
期刊:
影响因子:
16
通讯作者:
Patel DJ
中科院分区:
文献类型:
--
作者:
Yang H;Patel DJ
Prokaryotic CRISPR-Cas adaptive immune systems utilize sequence specific RNA-guided endonucleases to defend against infection by viruses, bacteriophages and mobile elements, while these foreign genetic elements evolve diverse anti-CRISPR proteins to overcome the CRISPR-Cas-mediated defense of the host. Recently, AcrIIA2 and AcrIIA4, encoded by Listeria monocytogenes prophages were shown to block the endonuclease activity of Type II-A Streptococcus pyogenes Cas9 (SpyCas9). We now report the crystal structure of AcrIIA4 in complex with single-guide RNA-bound SpyCas9, thereby establishing that AcrIIA4 preferentially targets critical residues essential for PAM duplex recognition, as well as blocks access to key catalytic residues lining the RuvC pocket. These structural insights, validated by biochemical assays on key mutants, demonstrate that AcrIIA4 competitively occupies both PAM-interacting and non-target DNA strand cleavage catalytic pockets. Our studies provide insights into anti-CRISPR mediated suppression mechanisms for inactivating SpyCas9, thereby broadening the applicability of CRISPR-Cas regulatory tools for genome editing.
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DOI:
10.1126/science.aaf5573
发表时间:
2016-08-05
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Abudayyeh OO;Gootenberg JS;Konermann S;Joung J;Slaymaker IM;Cox DB;Shmakov S;Makarova KS;Semenova E;Minakhin L;Severinov K;Regev A;Lander ES;Koonin EV;Zhang F
通讯作者:
Zhang F
影响因子:
64.8
作者:
East-Seletsky A;O'Connell MR;Knight SC;Burstein D;Cate JH;Tjian R;Doudna JA
通讯作者:
Doudna JA
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
影响因子:
64.8
作者:
Anders, Carolin;Niewoehner, Ole;Duerst, Alessia;Jinek, Martin
通讯作者:
Jinek, Martin
影响因子:
64.5
作者:
Hsu PD;Lander ES;Zhang F
通讯作者:
Zhang F