Structures of the holo CRISPR RNA-guided transposon integration complex.
Structures of the holo CRISPR RNA-guided transposon integration complex.
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DOI:
10.1038/s41586-022-05573-5
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发表时间:
2023-01
期刊:
影响因子:
64.8
通讯作者:
Kellogg, Elizabeth H. H.
中科院分区:
文献类型:
--
作者:
Park, Jung-Un;Tsai, Amy Wei-Lun;Rizo, Alexandrea N. N.;Truong, Vinh H. H.;Wellner, Tristan X. X.;Schargel, Richard D. D.;Kellogg, Elizabeth H. H.
CRISPR-associated transposons (CAST) are programmable mobile genetic elements that insert large DNA cargos using an RNA-guided mechanism. CAST elements contain multiple conserved proteins: a CRISPR effector (Cas12k or Cascade), a AAA+ regulator (TnsC), a transposase (TnsA–TnsB) and a target-site-associated factor (TniQ). These components are thought to cooperatively integrate DNA via formation of a multisubunit transposition integration complex (transpososome). Here we reconstituted the approximately 1 MDa type V-K CAST transpososome from Scytonema hofmannii (ShCAST) and determined its structure using single-particle cryo-electon microscopy. The architecture of this transpososome reveals modular association between the components. Cas12k forms a complex with ribosomal subunit S15 and TniQ, stabilizing formation of a full R-loop. TnsC has dedicated interaction interfaces with TniQ and TnsB. Of note, we observe TnsC–TnsB interactions at the C-terminal face of TnsC, which contribute to the stimulation of ATPase activity. Although the TnsC oligomeric assembly deviates slightly from the helical configuration found in isolation, the TnsC-bound target DNA conformation differs markedly in the transpososome. As a consequence, TnsC makes new protein–DNA interactions throughout the transpososome that are important for transposition activity. Finally, we identify two distinct transpososome populations that differ in their DNA contacts near TniQ. This suggests that associations with the CRISPR effector can be flexible. This ShCAST transpososome structure enhances our understanding of CAST transposition systems and suggests ways to improve CAST transposition for precision genome-editing applications. Structural studies of the CRISPR-associated transposon comprising Cas12k, TnsC, TnsB and TniQ from Scytonema hofmannii using cryo-electron microscopy reveal insights into the architecture and mechanism of RNA-guided DNA transposition.
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影响因子:
16
作者:
Kaczmarska, Zuzanna;Czarnocki-Cieciura, Mariusz;Gorecka-Minakowska, Karolina M.;Wingo, Robert J.;Jackiewicz, Justyna;Zajko, Weronika;Poznanski, Jaroslaw T.;Rawski, Michal;Grant, Timothy;Peters, Joseph E.;Nowotny, Marcin
通讯作者:
Nowotny, Marcin
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:
Jumper J;Evans R;Pritzel A;Green T;Figurnov M;Ronneberger O;Tunyasuvunakool K;Bates R;Žídek A;Potapenko A;Bridgland A;Meyer C;Kohl SAA;Ballard AJ;Cowie A;Romera-Paredes B;Nikolov S;Jain R;Adler J;Back T;Petersen S;Reiman D;Clancy E;Zielinski M;Steinegger M;Pacholska M;Berghammer T;Bodenstein S;Silver D;Vinyals O;Senior AW;Kavukcuoglu K;Kohli P;Hassabis D
通讯作者:
Hassabis D
影响因子:
64.5
作者:
Petassi MT;Hsieh SC;Peters JE
通讯作者:
Peters JE
影响因子:
56.9
作者:
Park, Jung-Un;Tsai, Amy Wei-Lun;Mehrotra, Eshan;Petassi, Michael T.;Hsieh, Shan-Chi;Ke, Ailong;Peters, Joseph E.;Kellogg, Elizabeth H.
通讯作者:
Kellogg, Elizabeth H.