Natural Sciences and Engineering Research Council (NSERC, Canada)
PDF-578176-2023
カナダ
Howard Hughes Medical Institute (HHMI)
米国
Other government
DE-AC52-07NA27344
引用
ジャーナル: Proc Natl Acad Sci U S A / 年: 2025 タイトル: Mechanism-guided engineering of a minimal biological particle for genome editing. 著者: Wayne Ngo / Julia Peukes / Alisha Baldwin / Zhiwei Wayne Xue / Sidney Hwang / Robert R Stickels / Zhi Lin / Ansuman T Satpathy / James A Wells / Randy Schekman / Eva Nogales / Jennifer A Doudna / 要旨: The widespread application of genome editing to treat and cure disease requires the delivery of genome editors into the nucleus of target cells. Enveloped delivery vehicles (EDVs) are engineered ...The widespread application of genome editing to treat and cure disease requires the delivery of genome editors into the nucleus of target cells. Enveloped delivery vehicles (EDVs) are engineered virally derived particles capable of packaging and delivering CRISPR-Cas9 ribonucleoproteins (RNPs). However, the presence of lentiviral genome encapsulation and replication proteins in EDVs has obscured the underlying delivery mechanism and precluded particle optimization. Here, we show that Cas9 RNP nuclear delivery is independent of the native lentiviral capsid structure. Instead, EDV-mediated genome editing activity corresponds directly to the number of nuclear localization sequences on the Cas9 enzyme. EDV structural analysis using cryo-electron tomography and small molecule inhibitors guided the removal of ~80% of viral residues, creating a minimal EDV (miniEDV) that retains full RNP delivery capability. MiniEDVs are 25% smaller yet package equivalent amounts of Cas9 RNPs relative to the original EDVs and demonstrated increased editing in cell lines and therapeutically relevant primary human T cells. These results show that virally derived particles can be streamlined to create efficacious genome editing delivery vehicles with simpler production and manufacturing.
名称: capsid (immature Gag) / タイプ: complex / ID: 2 / 親要素: 1 詳細: The capsid map was generated by subtomogram averaging of the capsid protein density from immature Gag in tomograms of Cas9 containing EDVs that were generated by expressing constructs derived ...詳細: The capsid map was generated by subtomogram averaging of the capsid protein density from immature Gag in tomograms of Cas9 containing EDVs that were generated by expressing constructs derived from lentiviral vectors.