Abstract
CRISPR-Cas9 has revolutionized the field of genome engineering. Base editing, a new genome editing strategy, was recently developed to engineer nucleotide substitutions. DNA base editing systems use a catalytically impared Cas nuclease together with a nucleobase deaminase enzyme to specifically introduce point mutations without generating double-stranded breaks, which provide huge potential in crop improvement. Here, we describe fast and efficient preparation of user-friendly C to T base editors, BE3, and Target-AID. Presented are detailed protocols for T-DNA vector preparation with BE3 or modified Target-AID base editor based on Gateway assembly and efficiency assessment of base editing through a rice protoplast transient expression system.
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