Genome-scale CRISPR screens are efficient in non-homologous end-joining deficient cells.
Sci Rep
; 9(1): 15751, 2019 10 31.
Article
em En
| MEDLINE
| ID: mdl-31673055
ABSTRACT
The mutagenic repair of Cas9 generated breaks is thought to predominantly rely on non-homologous end-joining (NHEJ), leading to insertions and deletions within DNA that culminate in gene knock-out (KO). In this study, by taking focused as well as genome-wide approaches, we show that this pathway is dispensable for the repair of such lesions. Genetic ablation of NHEJ is fully compensated for by alternative end joining (alt-EJ), in a POLQ-dependent manner, resulting in a distinct repair signature with larger deletions that may be exploited for large-scale genome editing. Moreover, we show that cells deficient for both NHEJ and alt-EJ were still able to repair CRISPR-mediated DNA double-strand breaks, highlighting how little is yet known about the mechanisms of CRISPR-based genome editing.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Sistemas CRISPR-Cas
/
Edição de Genes
Limite:
Humans
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article