Cytosine but not adenine base editor generates mutations in mice
2019
Deaminase base editing has emerged as a tool to install or correct point mutations in the genomes of living cells in a wide range of organisms and its ultimate success therapeutically depends on its accuracy. Here we have investigated the fidelity of cytosine base editor 4 (BE4) and adenine base editor (ABE) in mouse embryos using unbiased whole genome sequencing of a family-based trio cohort. We demonstrate that BE4-edited mice carry an excess of single-nucleotide variants and deletions compared to ABE-edited mice and controls.
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