On the other hand, it is possible that the editing mediated by the APOBEC enzymes, upon sublethal conditions (which do not drive virus extinction), acts in the diversification of the viral genome, providing source for the selection and evolution of highly fit variants.
Sites A and B are edited preferentially by ADAR1, whereas the editing of site D is mediated specifically by ADAR2 [ 37].
We cloned the paired gRNAs into the plasmid expressing either Cas9 or Cas9n, the D10A mutant nickase version of Cas9 that mediates genome editing with improved specificity (Ran et al., 2013).
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Importantly, Drosha cleavage was not affected by either mutation, clearly showing that the nucleotide changes mediated by editing are not themselves sufficient to inhibit the processing of mir-376a2.
We used clustered regularly interspaced short palindromic repeat/Cas9 (CRISPR/Cas9)–mediated genome editing to correct the dystrophin gene (Dmd) mutation in the germ line of mdx mice, a model for DMD, and then monitored muscle structure and function.
Finally, spot 1429 decreased 1.2-fold and is identified as apolipoprotein B mRNA-editing enzyme, catalytic polypeptide-like 2 (APOBEC2) that belongs to the cytidine deaminase superfamily and mediates editing of mRNA.
Our study is the first to show that chemically modified crRNAs of the CRISPR-Cpf1 system can functionally replace and mediate comparable gene editing to the natural crRNA, which holds the potential for enhancing both viral- and non-viral-mediated in vivo gene editing.
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In addition, delivery of additional TALEN into the organism may increase the possibility of off-target cleavage, which is the major concern of hybrid nucleases mediated genome editing.
