Regulation of mRNA poly(A) tail length governs mammalian body plan formation in gastruloids
A single-cell CRISPR screening platform is established in gastruloids to identify Cnot8-dependent mRNA deadenylation as a driver of mesoderm patterning and identify the deadenylase Cnot8 as a fundamental mechanism linking cellular identity with morphogenetic signaling during mammalian body plan formation.