Cas6 specificity and CRISPR RNA loading in a complex CRISPR-Cas system.
Cas6 specificity and CRISPR RNA loading in a complex CRISPR-Cas system.
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DOI:
10.1093/nar/gku308
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发表时间:
2014-06
影响因子:
14.9
通讯作者:
White MF
中科院分区:
文献类型:
--
作者:
Sokolowski RD;Graham S;White MF
CRISPR-Cas is an adaptive prokaryotic immune system, providing protection against viruses and other mobile genetic elements. In type I and type III CRISPR-Cas systems, CRISPR RNA (crRNA) is generated by cleavage of a primary transcript by the Cas6 endonuclease and loaded into multisubunit surveillance/effector complexes, allowing homology-directed detection and cleavage of invading elements. Highly studied CRISPR-Cas systems such as those in Escherichia coli and Pseudomonas aeruginosa have a single Cas6 enzyme that is an integral subunit of the surveillance complex. By contrast, Sulfolobus solfataricus has a complex CRISPR-Cas system with three types of surveillance complexes (Cascade/type I-A, CSM/type III-A and CMR/type III-B), five Cas6 paralogues and two different CRISPR-repeat families (AB and CD). Here, we investigate the kinetic properties of two different Cas6 paralogues from S. solfataricus. The Cas6-1 subtype is specific for CD-family CRISPR repeats, generating crRNA by multiple turnover catalysis whilst Cas6-3 has a broader specificity and also processes a non-coding RNA with a CRISPR repeat-related sequence. Deep sequencing of crRNA in surveillance complexes reveals a biased distribution of spacers derived from AB and CD loci, suggesting functional coupling between Cas6 paralogues and their downstream effector complexes.
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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:
48
作者:
Mali, Prashant;Esvelt, Kevin M.;Church, George M.
通讯作者:
Church, George M.
DOI:
10.1126/science.1165771
发表时间:
2008-12-19
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Marraffini LA;Sontheimer EJ
通讯作者:
Sontheimer EJ
影响因子:
14.9
作者:
Niewoehner O;Jinek M;Doudna JA
通讯作者:
Doudna JA
影响因子:
16
作者:
Spilman M;Cocozaki A;Hale C;Shao Y;Ramia N;Terns R;Terns M;Li H;Stagg S
通讯作者:
Stagg S