Poised neuronal genes are repressed by REST and Polycomb in embryonic stem cells independently and via different chromatin modifications.

Characterization of Drosophila female germ cell differentiation shows that nurse cells initiate Polycomb silencing by regulating Pcl and Scm levels to alter the biochemical properties of the PRC2 H3K27 methylase.

Zebrafish early embryos initially package their developmental genes and enhancers in 'active' chromatin that subsequently receives polycomb repressive complex 1 (PRC1)-mediated histone H2A ubiquitylation, which confers silencing/poising – prior to Aebp2-PRC2-guided H3K27me3 addition.

Polycomb enables lineage priming in mouse embryonic stem cells by establishing a barrier to commitment.

The E3 ubiquitin ligase activity of polycomb repressive complex 1 is stimulated by RYBP to support a histone modification-dependent communication between polycomb repressive complexes in mice.

Global, multi-angled genetic analyses identified an age-associated loss of stem cell lineage fidelity that was linked to changes in polycomb regulation in the Drosophila intestinal epithelium.

A protein that can recognize regions of DNA with a high proportion of unmethylated CpG dinucleotides, and then recruit polycomb group proteins to these CpG islands, has been identified.

Genomic imprinting in the bryophyte Marchantia polymorpha by Polycomb results in maternal dominance of embryonic gene expression.

The MYC transcription factor network member MGA is a subunit of a non-canonical Polycomb complex, which, when inactivated, accelerates tumorigenesis in mouse models of cancer and proliferation in colon organoids.

Polycomb repressive complex 1.1 restricts precocious myeloid differentiation of hematopoietic stem/progenitor cells and expansion of myeloid progenitors, thereby serving as a gatekeeper of emergency myelopoiesis and myeloid transformation.