摘要
Dear Editor,The clustered regularly interspaced short palindromic repeats/CRISPR-associated nuclease 9(CRISPR/Cas9)system,since it was excavated,has been rapidly developed and sparked a revolution in the genome editing field.In principle,CRISPR/Cas9 system relies on the recognition of specific loci on the genome,which is titled the protospacer adjacent motif(PAM).However,the canonical Streptococcus pyogenes Cas9(SpCas9)nuclease only recognizes NGG or NAG PAMs,rendering an inherent obstacle in amplifying the application of CRISPR/Cas9 technology.
基金
supported by the National Transgenic Science and Technology Program(2019ZX08010-003)
the Central Publicinterest Scientific Institution Basal Research Fund(Y2020XK17)
the Agricultural Science and Technology Innovation Program of Chinese Academy of Agricultural Sciences.