DND1-NANOS3 shapes the PGC transcriptome via a heptanucleotide sequence in mRNA 3' UTRs.

DND1-NANOS3 complex represses key mRNAs via a heptamer motif in Mus musculus primordial germ cells, recognizing the AUGAAUU sequence in 3' UTRs.

• Why it matters: Understanding how RBPs collaborate to regulate germ cell survival addresses a gap in post-transcriptional gene regulation, which is crucial for fertility and development.
• What they did: The study used tandem PAR-CLIP, genome editing, high-resolution structural analysis, and biochemical assays to identify a heptamer motif and characterize the DND1-NANOS3 complex's RNA-binding mechanism.
• The result: Relieving repression of CDK1 by editing the motif demonstrates the complex's role in controlling cell-cycle regulators, suggesting two-factor RBP interactions are key for safeguarding gene expression.