Two distinct RNase activities of CRISPR-C2c2 enable guide-RNA processing and RNA detection.
Two distinct RNase activities of CRISPR-C2c2 enable guide-RNA processing and RNA detection.
复制标题
CRISPR-C2C2的两种不同的RNase活性启用了指导RNA处理和RNA检测。
DOI:
10.1038/nature19802
复制
发表时间:
2016-10-13
期刊:
影响因子:
64.8
通讯作者:
Doudna JA
中科院分区:
文献类型:
--
作者:
East-Seletsky A;O'Connell MR;Knight SC;Burstein D;Cate JH;Tjian R;Doudna JA
Bacterial adaptive immune systems employ CRISPRs (clustered regularly interspaced short palindromic repeats) and CRISPR-associated (Cas) proteins for RNA-guided nucleic acid cleavage. Although generally targeted to DNA substrates, the Type III and Type VI CRISPR systems direct interference complexes against single-stranded RNA (ssRNA) substrates. In Type VI systems, the single-subunit C2c2 protein functions as an RNA-guided RNA endonuclease. How this enzyme acquires mature CRISPR RNAs (crRNAs) essential for immune surveillance and its mechanism of crRNA-mediated RNA cleavage remain unclear. Here we show that C2c2 possesses a unique ribonuclease activity responsible for CRISPR RNA maturation that is distinct from its RNA-activated ssRNA-degradation activity. These dual ribonuclease functions are chemically and mechanistically different from each other and from the crRNA-processing behavior of the evolutionarily unrelated CRISPR enzyme Cpf1. We show that the two ribonuclease activities of C2c2 enable multiplexed processing and loading of guide RNAs that in turn allow for sensitive cellular transcript detection.
登录
查看更多内容
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:
48
作者:
Langmead, Ben;Salzberg, Steven L.
通讯作者:
Salzberg, Steven L.
DOI:
10.1126/science.aaf5573
发表时间:
2016-08-05
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Abudayyeh OO;Gootenberg JS;Konermann S;Joung J;Slaymaker IM;Cox DB;Shmakov S;Makarova KS;Semenova E;Minakhin L;Severinov K;Regev A;Lander ES;Koonin EV;Zhang F
通讯作者:
Zhang F
影响因子:
7.2
作者:
McIlwain, David R.;Berger, Thorsten;Mak, Tak W.
通讯作者:
Mak, Tak W.
影响因子:
56.9
作者:
Jinek, Martin;Chylinski, Krzysztof;Charpentier, Emmanuelle
通讯作者:
Charpentier, Emmanuelle