Enhancement of homology-directed repair with chromatin donor templates in cells.
- Author(s): Cruz-Becerra, Grisel;
- Kadonaga, James T
- et al.
Published Web Locationhttps://doi.org/10.7554/elife.55780
A key challenge in precise genome editing is the low efficiency of homology-directed repair (HDR). Here we describe a strategy for increasing the efficiency of HDR in cells by using a chromatin donor template instead of a naked DNA donor template. The use of chromatin, which is the natural form of DNA in the nucleus, increases the frequency of HDR-edited clones as well as homozygous editing. In addition, transfection of chromatin results in negligible cytotoxicity. These findings suggest that a chromatin donor template should be useful for a wide range of HDR applications such as the precise insertion or replacement of DNA fragments that contain the coding regions of genes.