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Bacterial genome sequencing projects routinely uncover gene clusters that are predicted to encode the biosynthesis of uncharacterized small molecules. A subset of these cryptic genetic elements appears as individual operons. Here we investigate potential single-operon biosynthetic systems found in the genome of the pathogenic bacterium  Burkholderia pseudomallei . Placing these operons under the control of an inducible promoter led to the production of seven new metabolites. Among the molecules we identified are inhibitors of type-4 phosphodiesterases, suggesting that previously cryptic biosynthetic operons may encode metabolites that could contribute to microbial virulence by disrupting host signaling pathways.

Metabolites from the Induced Expression of Cryptic Single Operons Found in the Genome of Burkholderia pseudomallei