Japan Agency for Medical Research and Development (AMED)
日本
引用
ジャーナル: Cell / 年: 2023 タイトル: An AsCas12f-based compact genome-editing tool derived by deep mutational scanning and structural analysis. 著者: Tomohiro Hino / Satoshi N Omura / Ryoya Nakagawa / Tomoki Togashi / Satoru N Takeda / Takafumi Hiramoto / Satoshi Tasaka / Hisato Hirano / Takeshi Tokuyama / Hideki Uosaki / Soh Ishiguro / ...著者: Tomohiro Hino / Satoshi N Omura / Ryoya Nakagawa / Tomoki Togashi / Satoru N Takeda / Takafumi Hiramoto / Satoshi Tasaka / Hisato Hirano / Takeshi Tokuyama / Hideki Uosaki / Soh Ishiguro / Madina Kagieva / Hiroyuki Yamano / Yuki Ozaki / Daisuke Motooka / Hideto Mori / Yuhei Kirita / Yoshiaki Kise / Yuzuru Itoh / Satoaki Matoba / Hiroyuki Aburatani / Nozomu Yachie / Tautvydas Karvelis / Virginijus Siksnys / Tsukasa Ohmori / Atsushi Hoshino / Osamu Nureki / 要旨: SpCas9 and AsCas12a are widely utilized as genome-editing tools in human cells. However, their relatively large size poses a limitation for delivery by cargo-size-limited adeno-associated virus (AAV) ...SpCas9 and AsCas12a are widely utilized as genome-editing tools in human cells. However, their relatively large size poses a limitation for delivery by cargo-size-limited adeno-associated virus (AAV) vectors. The type V-F Cas12f from Acidibacillus sulfuroxidans is exceptionally compact (422 amino acids) and has been harnessed as a compact genome-editing tool. Here, we developed an approach, combining deep mutational scanning and structure-informed design, to successfully generate two AsCas12f activity-enhanced (enAsCas12f) variants. Remarkably, the enAsCas12f variants exhibited genome-editing activities in human cells comparable with those of SpCas9 and AsCas12a. The cryoelectron microscopy (cryo-EM) structures revealed that the mutations stabilize the dimer formation and reinforce interactions with nucleic acids to enhance their DNA cleavage activities. Moreover, enAsCas12f packaged with partner genes in an all-in-one AAV vector exhibited efficient knock-in/knock-out activities and transcriptional activation in mice. Taken together, enAsCas12f variants could offer a minimal genome-editing platform for in vivo gene therapy.