Structure of a type IV CRISPR-Cas ribonucleoprotein complex.
Structure of a type IV CRISPR-Cas ribonucleoprotein complex.
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DOI:
10.1016/j.isci.2021.102201
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发表时间:
2021-03-19
期刊:
影响因子:
5.8
通讯作者:
Taylor DW
中科院分区:
文献类型:
--
作者:
Zhou Y;Bravo JPK;Taylor HN;Steens JA;Jackson RN;Staals RHJ;Taylor DW
We reveal the cryo-electron microscopy structure of a type IV-B CRISPR ribonucleoprotein (RNP) complex (Csf) at 3.9-Å resolution. The complex best resembles the type III-A CRISPR Csm effector complex, consisting of a Cas7-like (Csf2) filament intertwined with a small subunit (Cas11) filament, but the complex lacks subunits for RNA processing and target DNA cleavage. Surprisingly, instead of assembling around a CRISPR-derived RNA (crRNA), the complex assembles upon heterogeneous RNA of a regular length arranged in a pseudo-A-form configuration. These findings provide a high-resolution glimpse into the assembly and function of enigmatic type IV CRISPR systems, expanding our understanding of class I CRISPR-Cas system architecture, and suggesting a function for type IV-B RNPs that may be distinct from other class 1 CRISPR-associated systems. The type IV-B CRISPR-Cas Csf proteins assemble around an RNA First structure of a type IV-B CRISPR-Cas RNP complex Structure confirms evolutionary link of type IV systems from a type III-like ancestor Assembly of RNP complex on non-CRISPR RNAs suggests a non-canonical role Biological Sciences; Structural Biology
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DOI:
10.1126/science.abb6151
发表时间:
2020-07-03
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Meeske AJ;Jia N;Cassel AK;Kozlova A;Liao J;Wiedmann M;Patel DJ;Marraffini LA
通讯作者:
Marraffini LA
影响因子:
64.8
作者:
Halpin-Healy, Tyler S.;Klompe, Sanne E.;Fernandez, Israel S.
通讯作者:
Fernandez, Israel S.
影响因子:
16
作者:
Jia, Ning;Mo, Charlie Y.;Patel, Dinshaw J.
通讯作者:
Patel, Dinshaw J.
DOI:
10.1107/s2059798318006551
发表时间:
2018-06-01
期刊:
Acta crystallographica. Section D, Structural biology
影响因子:
--
作者:
Afonine PV;Poon BK;Read RJ;Sobolev OV;Terwilliger TC;Urzhumtsev A;Adams PD
通讯作者:
Adams PD
DOI:
10.1107/s0907444909042073
发表时间:
2010-01
期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
--
作者:
Chen VB;Arendall WB 3rd;Headd JJ;Keedy DA;Immormino RM;Kapral GJ;Murray LW;Richardson JS;Richardson DC
通讯作者:
Richardson DC