eLife assessment
In this manuscript, the authors investigate the role of histone deacetylases in the spatial epigenetic control of zygotic gene expression in early gastrulation. They discover HDAC1 binding is maternally-controlled and that inhibition of histone acetylation blocks gastrulation and disrupts cell lineage integrity, tied to both positive and negative regulatory effects on gene transcription in space and time. The study contributes to a growing body of evidence that highlights a central role of histone acetylation-deacetylation dynamics in epigenetic regulation of gene expression and cell fating in early tissue patterning of the embryo.