CRISPR RNA-guided DNA cleavage by reconstituted Type I-A immune effector complexes.
CRISPR RNA-guided DNA cleavage by reconstituted Type I-A immune effector complexes.
复制标题
DOI:
10.1007/s00792-018-1057-0
复制
发表时间:
2019-01
期刊:
影响因子:
--
通讯作者:
Terns MP
中科院分区:
文献类型:
--
作者:
Majumdar S;Terns MP
Diverse CRISPR-Cas immune systems protect archaea and bacteria from viruses and other mobile genetic elements. All CRISPR-Cas systems ultimately function by sequence-specific destruction of invading complementary nucleic acids. However, each CRISPR system uses compositionally distinct crRNP [CRISPR (cr) RNA/Cas protein] immune effector complexes to recognize and destroy invasive nucleic acids by unique molecular mechanisms. Previously, we found that Type I-A (Csa) effector crRNPs from Pyrococcus furiosus function in vivo to eliminate invader DNA. Here, we reconstituted functional Type I-A effector crRNPs in vitro with recombinant Csa proteins and synthetic crRNA and characterized properties of crRNP assembly, target DNA recognition and cleavage. Six proteins (Csa 4–1, Cas3″, Cas3′, Cas5a, Csa2, Csa5) are essential for selective target DNA binding and cleavage. Native gel shift analysis and UV-induced RNA–protein crosslinking demonstrate that Cas5a and Csa2 directly interact with crRNA 5′ tag and guide sequences, respectively. Mutational analysis revealed that Cas3″ is the effector nuclease of the complex. Together, our results indicate that DNA cleavage by Type I-A crRNPs requires crRNA-guided and protospacer adjacent motif-dependent target DNA binding to unwind double-stranded DNA and expose single strands for progressive ATP-dependent 3′–5′ cleavage catalyzed by integral Cas3′ helicase and Cas3″ nuclease crRNP components.
登录
查看更多内容
影响因子:
16
作者:
Hale, Caryn R.;Majumdar, Sonali;Elmore, Joshua;Pfister, Neil;Compton, Mark;Olson, Sara;Resch, Alissa M.;Glover, Claiborne V. C., III;Graveley, Brenton R.;Terns, Rebecca M.;Terns, Michael P.
通讯作者:
Terns, Michael P.
影响因子:
5.6
作者:
Lintner NG;Frankel KA;Tsutakawa SE;Alsbury DL;Copié V;Young MJ;Tainer JA;Lawrence CM
通讯作者:
Lawrence CM
影响因子:
3.2
作者:
Deveau, Helene;Barrangou, Rodolphe;Moineau, Sylvain
通讯作者:
Moineau, Sylvain
影响因子:
11.4
作者:
Beloglazova, Natalia;Petit, Pierre;Yakunin, Alexander F.
通讯作者:
Yakunin, Alexander F.
影响因子:
10.5
作者:
Elmore JR;Sheppard NF;Ramia N;Deighan T;Li H;Terns RM;Terns MP
通讯作者:
Terns MP