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Abstract
<abstract> <p>Nucleases currently used in genome engineering induce hydrolysis of DNA phosphate backbone in a sequence-specific manner. The RNA guided nucleases describe today are recognizing a sequence with two distinct molecular interactions: first, like a restriction endonuclease, by direct interaction between the protein and the DNA; and second, by hybridization of the guide RNA with the target DNA sequence. Here we report an in vitro assay to assess the cleavage specificity and the selectivity of the nucleases. The assay is designed using a plasmid encompassing the DNA target site degenerated at positions determined on structural feature. The results demonstrate that the Cpf1 RNA guided nuclease is highly specific for the target sequence, nevertheless its substrate selectivity is low compare to a restriction endonuclease.</p> </abstract>
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