Mismatch Intolerance of 5'-Truncated sgRNAs in CRISPR/Cas9 Enables Efficient Microbial Single-Base Genome Editing.

ABSTRACT: The CRISPR/Cas9 system has recently emerged as a useful gene-specific editing tool. However, this approach occasionally results in the digestion of both the DNA target and similar DNA sequences due to mismatch tolerance, which remains a significant drawback of current genome editing technologies. However, our study determined that even single-base mismatches between the target DNA and 5'-truncated sgRNAs inhibited target recognition. These results suggest that a 5'-truncated sgRNA/Cas9 complex could be used to negatively select single-base-edited targets in microbial genomes. Moreover, we demonstrated that the 5'-truncated sgRNA method can be used for simple and effective single-base editing, as it enables the modification of individual bases in the DNA target, near and far from the 5' end

SUBMITTER: Lee HJ 

PROVIDER: S-EPMC8235755 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature