Signatures of nonsense-mediated mRNA decay but no evidence for transcriptional adaptation associated with protein-truncating variants in wild yeast diploids.

Nonsense-mediated mRNA decay effectively degrades PTV transcripts in wild yeast diploids but shows no widespread evidence of transcriptional adaptation.

• Why it matters: Understanding how natural yeast populations cope with protein-truncating variants is crucial for revealing mechanisms of genetic robustness and mutation mitigation.
• What they did: The study analyzed PTVs in natural yeast diploids, measuring transcript levels and surveillance activity, focusing on the presence of transcriptional adaptation signals.
• The result: Despite active NMD reducing PTV transcript abundance, no general transcriptional compensation was observed, indicating that yeast rely mainly on network robustness rather than specific adaptive responses.