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Dual base editor catalyzes both cytosine and adenine base conversions in human cells.

Xiaohui Zhang | Biyun Zhu | Liang Chen | Ling Xie | Weishi Yu | Ying Wang | Linxi Li | Shuming Yin | Lei Yang | Handan Hu | Honghui Han | Yongmei Li | Liren Wang | Geng Chen | Xueyun Ma | Hongquan Geng | Wanfeng Huang | Xiufeng Pang | Zuozhen Yang | Yuxuan Wu | Stefan Siwko | Ryo Kurita | Yukio Nakamura | Li Yang | Mingyao Liu | Dali Li
Nature biotechnology | 2020

Although base editors are useful tools for precise genome editing, current base editors can only convert either adenines or cytosines. We developed a dual adenine and cytosine base editor (A&C-BEmax) by fusing both deaminases with a Cas9 nickase to achieve C-to-T and A-to-G conversions at the same target site. Compared to single base editors, A&C-BEmax's activity on adenines is slightly reduced, whereas activity on cytosines is higher and RNA off-target activity is substantially decreased.

Pubmed ID: 32483363

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