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Evidence shows that chromatin modifiers regulate genetic outcomes in genome engineering, suggesting new approaches.
In toto, these experiments underscore the profound impact that chromatin modifiers - and by extension, chromatin structure - have on PGE outcomes. Specifically, we have identified SETDB1/ATF7IP and the HUSH complex as major negative regulators of the HDR subpathway, ssDI, when the target is a transgene. These experiments are a proof-of-principle that chromatin can act as a potent barrier to genetic recombination and they strongly support the feasibility of extending similar chromatin modulating strategies to enhance PGE efficiency at endogenous single-copy loci.
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Ruis et al. (2026) studied this question.
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