An AsCas12f-based compact genome-editing tool derived by deep mutational scanning and structural analysis.
CRISPR-Cas
animal experiments
cryo-EM
deep mutational scanning
gene therapy
genome editing
iPS cells
Journal
Cell
ISSN: 1097-4172
Titre abrégé: Cell
Pays: United States
ID NLM: 0413066
Informations de publication
Date de publication:
26 10 2023
26 10 2023
Historique:
received:
21
04
2023
revised:
27
06
2023
accepted:
23
08
2023
medline:
30
10
2023
pubmed:
1
10
2023
entrez:
30
9
2023
Statut:
ppublish
Résumé
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.
Identifiants
pubmed: 37776859
pii: S0092-8674(23)00963-7
doi: 10.1016/j.cell.2023.08.031
pii:
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
4920-4935.e23Informations de copyright
Copyright © 2023 The Authors. Published by Elsevier Inc. All rights reserved.
Déclaration de conflit d'intérêts
Declaration of interests T.H., S.N.O., R.N., Y.K., S.M., T.O., A.H., and O.N. have filed a patent application related to this work.