SpCas9-NG
Engineering MethodSpCas9-NG is an engineered Streptococcus pyogenes Cas9 nuclease variant that recognizes NGN protospacer-adjacent motifs instead of the NGG PAM required by wild-type SpCas9. In the cited 2021 Communications Biology study, it was used for RNA-guided genome editing to target the boundary of expanded CAG repeats and induce precise repeat contraction in a Huntington’s disease mouse model context.