@article{Kim19012016, author = {Kim, Daesik and Kim, Sojung and Kim, Sunghyun and Park, Jeongbin and KIM, Jin-Soo}, title = {Genome-wide target specificities of CRISPR-Cas9 nucleases revealed by multiplex Digenome-seq}, year = {2016}, doi = {10.1101/gr.199588.115}, elocation-id = {gr.199588.115}, abstract ={We present multiplex Digenome-seq to profile genome-wide specificities of up to 11 CRISPR-Cas9 nucleases simultaneously, saving time and reducing cost. Cell-free human genomic DNA was digested using multiple sgRNAs combined with the Cas9 protein and then subjected to whole genome sequencing. In vitro cleavage patterns, characteristic of on- and off-target sites, were computationally identified across the genome using a new DNA cleavage scoring system. We found that many false-positive, bulge-type off-target sites were cleaved by sgRNAs transcribed from an oligonucleotide duplex but not by those transcribed from a plasmid template. Multiplex Digenome-seq captured many bona fide off-target sites, missed by other genome-wide methods, at which indels were induced at frequencies below 0.1%. After analyzing 964 sites cleaved in vitro by these sgRNAs and measuring indel frequencies at hundreds of off-target sites in cells, we propose a guideline for the choice of target sites for minimizing CRISPR-Cas9 off-target effects in the human genome.}, URL = {http://genome.cshlp.org/content/early/2016/01/19/gr.199588.115.abstract}, eprint = {http://genome.cshlp.org/content/early/2016/01/19/gr.199588.115.full.pdf+html}, journal = {Genome Research} }