A dual-deaminase CRISPR base editor enables concurrent adenine and cytosine editing.

Grünewald, Julian; Zhou, Ronghao; Lareau, Caleb A; Garcia, Sara P; Iyer, Sowmya; Miller, Bret R; Langner, Lukas M; Hsu, Jonathan Y et al. · Nat Biotechnol · 2020

basic_science · Level V

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Abstract

Existing adenine and cytosine base editors induce only a single type of modification, limiting the range of DNA alterations that can be created. Here we describe a CRISPR-Cas9-based synchronous programmable adenine and cytosine editor (SPACE) that can concurrently introduce A-to-G and C-to-T substitutions with minimal RNA off-target edits. SPACE expands the range of possible DNA sequence alterations, broadening the research applications of CRISPR base editors.

Medical subject headings