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Several polyketide secondary metabolites are predicted to undergo isoprenoid-like β-alkylations during biosynthesis. One such secondary metabolite is myxovirescin A1, produced by Myxococcus xanthus. Myxovirescin is of special interest in that it appears to undergo two distinct β-alkylations. Additionally, the myxovirescin biosynthetic gene cluster lacks tandem thiolation domains required in the synthesis...
We have developed a phage-display method for high-throughput mining of bacterial gene clusters encoding the natural-product biosynthetic enzymes, polyketide synthases (PKSs) and nonribosomal peptide synthetases (NRPSs). This method uses the phosphopantetheinyl transferase activity of Sfp to specifically biotinylate NRPS and PKS carrier-protein domains expressed from a library of random genome fragments...
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