DNA Repair Pathway Choices in CRISPR-Cas9-Mediated Genome Editing.
DNA Repair Pathway Choices in CRISPR-Cas9-Mediated Genome Editing.
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DOI:
10.1016/j.tig.2021.02.008
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发表时间:
2021-07
期刊:
影响因子:
--
通讯作者:
Greene EC
中科院分区:
文献类型:
--
作者:
Xue C;Greene EC
Many CRISPR-Cas-based genome editing technologies take advantage of Cas nucleases to induce DNA double-strand breaks (DSBs) at desired locations within a genome. Further processing of the DSBs by the cellular DSB repair machinery is then necessary to introduce desired mutations, sequence insertions, or gene deletions. Thus, the accuracy and efficiency of genome editing are influenced by the cellular DSB repair pathways. DSBs are themselves highly genotoxic lesions and as such cells have evolved multiple mechanisms for their repair. These repair pathways include homologous recombination (HR), classical non-homologous end joining (cNHEJ), microhomology-mediated end joining (MMEJ) and single-strand annealing (SSA). In this review, we briefly highlight the CRISPR-Cas9 system and we then describe the mechanisms of DSB repair. Finally, we summarize recent findings of factors that can influence the choice of DNA repair pathway response to Cas9-induced DSBs.
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