Targeted base editing in rice and tomato using a CRISPR-Cas9 cytidine deaminase fusion.

Shimatani, Zenpei; Kashojiya, Sachiko; Takayama, Mariko; Terada, Rie; Arazoe, Takayuki; Ishii, Hisaki; Teramura, Hiroshi; Yamamoto, Tsuyoshi et al. · Nat Biotechnol · 2017

basic_science · Level V

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Abstract

We applied a fusion of CRISPR-Cas9 and activation-induced cytidine deaminase (Target-AID) for point mutagenesis at genomic regions specified by single guide RNAs (sgRNAs) in two crop plants. In rice, we induced multiple herbicide-resistance point mutations by multiplexed editing using herbicide selection, while in tomato we generated marker-free plants with homozygous heritable DNA substitutions, demonstrating the feasibility of base editing for crop improvement.

Medical subject headings