C2c2 is a single-component programmable RNA-guided RNA-targeting CRISPR effector

Omar O. Abudayyeh, Jonathan S. Gootenberg, Silvana Konermann, Julia Joung, Ian M. Slaymaker, David B.T. Cox, Sergey Shmakov, Kira S. Makarova, Ekaterina Semenova, Leonid Minakhin, Konstantin Severinov, Aviv Regev, Eric S. Lander, Eugene V. Koonin, Feng Zhang

Research output: Contribution to journalArticlepeer-review

789 Scopus citations


The clustered regularly interspaced short palindromic repeat (CRISPR) - CRISPR-associated genes (Cas) adaptive immune system defends microbes against foreign genetic elements via DNA or RNA-DNA interference. We characterize the class 2 type VI CRISPR-Cas effector C2c2 and demonstrate its RNA-guided ribonuclease function. C2c2 from the bacterium Leptotrichia shahii provides interference against RNA phage. In vitro biochemical analysis shows that C2c2 is guided by a single CRISPR RNA and can be programmed to cleave single-stranded RNA targets carrying complementary protospacers. In bacteria, C2c2 can be programmed to knock down specific mRNAs. Cleavage is mediated by catalytic residues in the two conserved Higher Eukaryotes and Prokaryotes Nucleotide-binding (HEPN) domains, mutations of which generate catalytically inactive RNA-binding proteins. These results broaden our understanding of CRISPR-Cas systems and suggest that C2c2 can be used to develop new RNA-targeting tools.

Original languageEnglish (US)
Article numberaaf5573
Issue number6299
StatePublished - Aug 5 2016

All Science Journal Classification (ASJC) codes

  • General


Dive into the research topics of 'C2c2 is a single-component programmable RNA-guided RNA-targeting CRISPR effector'. Together they form a unique fingerprint.

Cite this