TY - JOUR TI - Multiplex Genome Engineering Using CRISPR/Cas Systems AU - Le Cong AU - F. Ann Ran AU - David Cox AU - Shuailiang Lin AU - Robert P. J. Barretto AU - Naomi Habib AU - Patrick D. Hsu AU - Xuebing Wu AU - Wenyan Jiang AU - Luciano A. Marraffini AU - Feng Zhang PY - 2013 JO - Science DO - 10.1126/science.1231143 UR - https://doi.org/10.1126/science.1231143 AB - Functional elucidation of causal genetic variants and elements requires precise genome editing technologies. The type II prokaryotic CRISPR (clustered regularly interspaced short palindromic repeats)/Cas adaptive immune system has been shown to facilitate RNA-guided site-specific DNA cleavage. We engineered two different type II CRISPR/Cas systems and demonstrate that Cas9 nucleases can be directed by short RNAs to induce precise cleavage at endogenous genomic loci in human and mouse cells. Cas9 can also be converted into a nicking enzyme to facilitate homology-directed repair with minimal mutagenic activity. Lastly, multiple guide sequences can be encoded into a single CRISPR array to enable simultaneous editing of several sites within the mammalian genome, demonstrating easy programmability and wide applicability of the RNA-guided nuclease technology. ER -