ArticleThe EMBO journal2026
RYBP regulates selective genomic binding of TrxG and PcG components in embryonic stem cell fate control.
Article in The EMBO journal, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Selective gene expression is pivotal in orchestrating human development. Specifically, trithorax group (TrxG) and polycomb group (PcG) components play crucial roles in transcriptional activation and repression of state-specific stem cell expression programs, yet the mechanisms underlying their selective genomic binding remain poorly understood. In this study, we report that the polycomb repressive complex 1 (PRC1) subunit RYBP co-localizes with TrxG component WDR5 and selectively enriches PcG component RING1B in condensates in murine embryonic stem cells (ESCs). RYBP deficiency impairs the genomic binding of WDR5 and RING1B. Further, STAT3 excludes RING1B binding at RYBP-associated transcriptionally active loci. Additionally, RYBP depletion attenuates WDR5-dependent activation of DNA repair gene expression and facilitates the transition of ESCs to 2-cell-like cells. Finally, RYBP depletion disrupts RING1B deposition at lineage-specific genes, promoting ESC differentiation towards mesendoderm fate. These findings uncover RYBP as a regulator of selective genomic binding of TrxG and PcG components, providing insights into their roles in cell fate determination during development.
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