β-Lactone-containing natural products are rare. Now, a polyketide with a unique cyclopentane–β-lactone skeleton is reported. The key enzymes identified for the formation of the bicyclic core are a non-ribosomal peptide synthetase-like module with a β-lactone ring forming esterase and peptidyl carrier protein, thioester reductase and condensation domains.
- Zi Fei Xu
- Ye Lei Zhou
- Hui Ming Ge