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| タイトル | Computational design of a high-precision mitochondrial DNA cytosine base editor. |
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| ジャーナル・号・ページ | Nat Struct Mol Biol, Vol. 32, Issue 12, Page 2575-2586, Year 2025 |
| 掲載日 | 2025年11月17日 |
著者 | Li Mi / Yu-Xuan Li / Xinchen Lv / Zi-Li Wan / Xu Liu / Kairan Zhang / Huican Li / Yue Yao / Leping Zhang / Zhe Xu / Xingyu Zhuang / Kunqian Ji / Min Jiang / Yangming Wang / Peilong Lu / ![]() |
| PubMed 要旨 | Bystander editing remains a major limitation of current base editors, hindering their precision and therapeutic potential. Here, we present a de novo protein design strategy that creates a ...Bystander editing remains a major limitation of current base editors, hindering their precision and therapeutic potential. Here, we present a de novo protein design strategy that creates a structurally rigid interface between a DNA-binding TALE domain and a cytosine deaminase, forming a unified editing module termed TALE-oriented deaminase (TOD). Cryo-EM analysis of TOD-DNA complexes confirms that this precise spatial architecture tightly restricts the deaminase activity window, thereby minimizing unwanted deamination. To further enhance editing specificity, we develop a split version, termed DdCBE-TOD, which virtually eliminates off-target editing. As a proof of concept, we apply DdCBE-TOD to generate a mitochondrial disease mouse model and to correct a pathogenic mutation associated with MERRF syndrome in patient-derived cells, achieving single-nucleotide precision. This work introduces a generalizable and computationally guided approach for ultra-precise base editing, offering a promising platform for both mechanistic studies and therapeutic correction of single-nucleotide mutations. |
リンク | Nat Struct Mol Biol / PubMed:41249818 |
| 手法 | EM (単粒子) |
| 解像度 | 2.64 - 3.18 Å |
| 構造データ | EMDB-62995, PDB-9lcx: EMDB-62996, PDB-9lcy: EMDB-62997, PDB-9lcz: EMDB-62998, PDB-9ld0: EMDB-62999, PDB-9ld1: |
| 化合物 | ![]() ChemComp-ZN: |
| 由来 |
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キーワード | DE NOVO PROTEIN / De novo design / DNA-binding TALE domain / deaminase (Ddd_Ss) / orienting domain / deaminase(Ddd_Ss) |
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burkholderia cenocepacia (バクテリア)
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