Abstract
The polytheonamides are among the most complex and biosynthetically distinctive natural products known to date. These potent peptide cytotoxins are derived from a ribosomal precursor processed by 49 mostly non-canonical posttranslational modifications. As the producer is a ‘microbial dark matter’ bacterium only distantly related to any cultivated organism, >70-step chemical syntheses have been developed to access these unique compounds. Here, we mined prokaryotic diversity to establish a synthetic platform based on the new host Microvirgula aerodenitrificans that produces hypermodified peptides within two days. Using this system, we generated the aeronamides, new polytheonamide-type compounds with near-picomolar cytotoxicity. Aeronamides, as well as the polygeonamides produced from deep-rock biosphere DNA, contain the highest numbers of d-amino acids in known biomolecules. With increasing bacterial genomes being sequenced, similar host mining strategies might become feasible to access further elusive natural products from uncultivated life.
Original language | English (US) |
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Pages (from-to) | 931-939 |
Number of pages | 9 |
Journal | Nature Chemistry |
Volume | 11 |
Issue number | 10 |
DOIs | |
State | Published - Oct 1 2019 |
Bibliographical note
Publisher Copyright:© 2019, The Author(s), under exclusive licence to Springer Nature Limited.