Structural basis for two metal-ion catalysis of DNA cleavage by Cas12i2.
Structural basis for two metal-ion catalysis of DNA cleavage by Cas12i2.
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Cas12i2 两种金属离子催化 DNA 切割的结构基础
DOI:
10.1038/s41467-020-19072-6
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发表时间:
2020-10-16
影响因子:
16.6
通讯作者:
Wang Y
中科院分区:
文献类型:
--
作者:
Huang X;Sun W;Cheng Z;Chen M;Li X;Wang J;Sheng G;Gong W;Wang Y
To understand how the RuvC catalytic domain of Class 2 Cas proteins cleaves DNA, it will be necessary to elucidate the structures of RuvC-containing Cas complexes in their catalytically competent states. Cas12i2 is a Class 2 type V-I CRISPR-Cas endonuclease that cleaves target dsDNA by an unknown mechanism. Here, we report structures of Cas12i2–crRNA–DNA complexes and a Cas12i2–crRNA complex. We reveal the mechanism of DNA recognition and cleavage by Cas12i2, and activation of the RuvC catalytic pocket induced by a conformational change of the Helical-II domain. The seed region (nucleotides 1–8) is dispensable for RuvC activation, but the duplex of the central spacer (nucleotides 9–15) is required. We captured the catalytic state of Cas12i2, with both metal ions and the ssDNA substrate bound in the RuvC catalytic pocket. Together, our studies provide significant insights into the DNA cleavage mechanism by RuvC-containing Cas proteins.
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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:
56.9
作者:
Jinek, Martin;Chylinski, Krzysztof;Charpentier, Emmanuelle
通讯作者:
Charpentier, Emmanuelle
影响因子:
56.9
作者:
Jiang, Fuguo;Zhou, Kaihong;Doudna, Jennifer A.
通讯作者:
Doudna, Jennifer A.
DOI:
10.1002/prot.10286
发表时间:
2003-02-15
期刊:
PROTEINS-STRUCTURE FUNCTION AND GENETICS
影响因子:
--
作者:
Lovell, SC;Davis, IW;Richardson, DC
通讯作者:
Richardson, DC
DOI:
10.1107/s0907444902016657
发表时间:
2002-11-01
影响因子:
2.2
作者:
Adams, PD;Grosse-Kunstleve, RW;Terwilliger, TC
通讯作者:
Terwilliger, TC