New insights into the construction of wild-type Saba pig-derived Escherichia coli irp2 gene deletion strains

Abstract To construct wild-type E. coli irp2 gene deletion strains, CRISPR/Cas9 gene editing technology was used, and the difficulty and key points of gene editing of wild-type strains were analyzed. Based on the resistance of the CRISPR/Cas9 system expression vector, 4 strains of 41 E. coli strains isolated from Saba pigs were selected as the target strains for the deletion of the irp2 gene, which were sensitive to both ampicillin and kanamycin. Then, CRISPR/Cas9 technology was combined with homologous recombination technology to construct recombinant vectors containing Cas9, sgRNA and donor... Mehr ...