DNA interference states of the hypercompact CRISPR-CasΦ effector.
DNA interference states of the hypercompact CRISPR-CasΦ effector.
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DOI:
10.1038/s41594-021-00632-3
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发表时间:
2021-08
影响因子:
16.8
通讯作者:
Doudna JA
中科院分区:
文献类型:
--
作者:
Pausch P;Soczek KM;Herbst DA;Tsuchida CA;Al-Shayeb B;Banfield JF;Nogales E;Doudna JA
CRISPR-CasΦ, a small RNA-guided enzyme found uniquely in bacteriophages, achieves programmable DNA cutting as well as genome editing. To investigate how the hypercompact enzyme recognizes and cleaves double-stranded DNA, we determined cryo-EM structures of CasΦ (Cas12j) in pre- and post-DNA binding states. The structures reveal a streamlined protein architecture that tightly encircles the CRISPR RNA and DNA target to capture, unwind and cleave DNA. Comparison of the pre- and post-DNA binding states reveals how the protein rearranges for DNA cleavage upon target recognition. Based on these structures, we created and tested mutant forms of CasΦ that cut DNA up to 20-fold faster relative to wildtype, showing how this system may be naturally attenuated to improve the fidelity of DNA interference. The structural and mechanistic insights into how CasΦ binds and cleaves DNA should allow for protein engineering for both in vitro diagnostics and genome editing.
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DOI:
10.1126/science.aav4294
发表时间:
2018-11-16
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Harrington LB;Burstein D;Chen JS;Paez-Espino D;Ma E;Witte IP;Cofsky JC;Kyrpides NC;Banfield JF;Doudna JA
通讯作者:
Doudna JA
DOI:
10.1107/s2059798318009324
发表时间:
2018-09-01
期刊:
Acta crystallographica. Section D, Structural biology
影响因子:
--
作者:
Afonine PV;Klaholz BP;Moriarty NW;Poon BK;Sobolev OV;Terwilliger TC;Adams PD;Urzhumtsev A
通讯作者:
Urzhumtsev A
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:
Anders, Carolin;Niewoehner, Ole;Duerst, Alessia;Jinek, Martin
通讯作者:
Jinek, Martin
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K