A proteomics approach to discovering natural products and their biosynthetic pathways.

ABSTRACT: Many natural products with antibiotic, anticancer and antifungal properties are synthesized by nonribosomal peptide synthetases (NRPSs) and polyketide synthases (PKSs). Although genome sequencing has revealed the diversity of these enzymes, identifying new products and their biosynthetic pathways remains challenging. By taking advantage of the size of these enzymes (often >2,000 amino acids) and unique marker ions derived from their common phosphopantetheinyl cofactor, we adapted mass spectrometry-based proteomics to selectively detect NRPS and PKS gene clusters in microbial proteomes without requiring genome sequence information. We detected known NRPS systems in members of the genera Bacillus and Streptomyces, and screened 22 environmental isolates to uncover production of unknown natura

SUBMITTER: Bumpus SB 

PROVIDER: S-EPMC2782881 | biostudies-literature | 2009 Oct

REPOSITORIES: biostudies-literature