Writing of H3K4Me3 overcomes epigenetic silencing in a sustained but context-dependent manner

Abstract

Epigenome editing by zinc finger (ZF) and CRISPR-dCas9 technologies can induce or repress gene expression. Here, the authors show that histone methyltransferase PRDM9 fused to either dCas9 or ZF proteins can sustain gene re-expression, and H3K79me is required for stable gene re-expression.