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High Homology-Directed Repair Using Mitosis Phase and Nucleus Localizing Signal

Overview
Journal Int J Mol Sci
Publisher MDPI
Date 2020 May 30
PMID 32466470
Citations 8
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Abstract

In homology-directed repair, mediated knock-in single-stranded oligodeoxynucleotides (ssODNs) can be used as a homologous template and present high efficiency, but there is still a need to improve efficiency. Previous studies have mainly focused on controlling double-stranded break size, ssODN stability, and the DNA repair cycle. Nevertheless, there is a lack of research on the correlation between the cell cycle and single-strand template repair (SSTR) efficiency. Here, we investigated the relationship between cell cycle and SSTR efficiency. We found higher SSTR efficiency during mitosis, especially in the metaphase and anaphase. A Cas9 protein with a nuclear localization signal (NLS) readily migrated to the nucleus; however, the nuclear envelope inhibited the nuclear import of many nucleotide templates. This seemed to result in non-homologous end joining (NHEJ) before the arrival of the homologous template. Thus, we assessed whether NLS-tagged ssODNs and free NLS peptides could circumvent problems posed by the nuclear envelope. NLS-tagging ssODNs enhanced SSTR and indel efficiency by 4-fold compared to the control. Our results suggest the following: (1) mitosis is the optimal phase for SSTR, (2) the donor template needs to be delivered to the nucleus before nuclease delivery, and (3) NLS-tagging ssODNs improve SSTR efficiency, especially high in mitosis.

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References
1.
Giraud G, Stadhouders R, Conidi A, Dekkers D, Huylebroeck D, Demmers J . NLS-tagging: an alternative strategy to tag nuclear proteins. Nucleic Acids Res. 2014; 42(21). PMC: 4245968. DOI: 10.1093/nar/gku869. View

2.
Gu B, Posfai E, Rossant J . Efficient generation of targeted large insertions by microinjection into two-cell-stage mouse embryos. Nat Biotechnol. 2018; 36(7):632-637. DOI: 10.1038/nbt.4166. View

3.
Rodriguez A, DAndrea A . Fanconi anemia pathway. Curr Biol. 2017; 27(18):R986-R988. DOI: 10.1016/j.cub.2017.07.043. View

4.
Chazaud C, Yamanaka Y . Lineage specification in the mouse preimplantation embryo. Development. 2016; 143(7):1063-74. DOI: 10.1242/dev.128314. View

5.
Bertoni C, Rustagi A, Rando T . Enhanced gene repair mediated by methyl-CpG-modified single-stranded oligonucleotides. Nucleic Acids Res. 2009; 37(22):7468-82. PMC: 2794159. DOI: 10.1093/nar/gkp757. View