DUX Proteins Drive Phase Separation to Activate Zygotic Genome and Establish Totipotency

Researchers have identified a critical mechanism underlying the acquisition of totipotency, one of the earliest and most significant events in mammalian development. This process, known as zygotic genome activation (ZGA), marks the initiation of an embryo’s transcriptional activity and is characterized by the temporary expression of specific genes associated with the 2-cell stage (2C) and endogenous retrotransposons. The study highlights the role of DUX family proteins in orchestrating phase separation to remodel the three-dimensional genome structure and activate retrotransposons, ultimately inducing totipotent-like states.

The findings reveal that DUX family proteins play a central role in facilitating this transition by driving phase separation, which reorganizes genomic architecture during ZGA. This reorganization enables the activation of 2C-specific genes and endogenous retrotransposons, elements crucial for establishing totipotency. The research sheds light on how these proteins contribute to early embryonic development through their influence on gene expression patterns and chromatin dynamics. By uncovering these molecular processes, scientists aim to deepen understanding of developmental biology and cellular reprogramming mechanisms.

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Date: April 23, 2026

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GOAI