Yinghui Wei, Ming Jin, Shuhong Huang, Fangyao Yao, Ningxin Ren, Kun Xu, Shangpu Li, Pengfei Gao, Yingsi Zhou, Yulin Chen, Hui Yang, Wen Li, Chunlong Xu, Meiling Zhang, Xiaolong Wang
Mitochondrial base editing with DddA-derived cytosine base editor (DdCBE) is limited in the accessible target sequences and modest activity. Here, the optimized DdCBE tools is presented with improved editing activity and expanded C-to-T targeting scope by fusing DddA11 variant with different cytosine deaminases with single-strand DNA activity. Compared to previous DdCBE based on DddA11 variant alone, fusion of the activation-induced cytidine deaminase (AID) from Xenopus laevis not only permits cytosine editing of 5'-GC-3' sequence, but also elevates editing efficiency at 5'-TC-3', 5'-CC-3', and 5'-GC-3' targets by up to 25-, 10-, and 6-fold, respectively...
January 2024: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)