We find many lncRNAs degraded by DCP2 are expressed proximal to inducible genes.
Of these, we show several genes required for galactose utilization are associated with lncRNAs that have expression patterns inversely correlated with their mRNA counterpart. Moreover, decapping of these lncRNAs is critical for rapid and robust induction of GAL gene expression.
Failure to destabilize a lncRNA known to exert repressive histone modifications results in perpetuation of a repressive chromatin state that contributes to reduced plasticity of gene activation.
We propose that decapping and lncRNA degradation serve a vital role in transcriptional regulation specifically at inducible genes.