Azetidine is a pharmacophore present in drug-related molecules. Here the authors unveil a two-metalloenzyme cascade leading to the azetidine-containing polyoximic acid, in which PolE functions as an Fe2+/pterin-dependent l-isoleucine desaturase, while PolF is a haem-oxygenase-like diiron oxidase, orchestrating the sequential desaturation and cyclization. These findings expand our knowledge of metalloenzymes.
- Rong Gong
- Yao Qu
- Wenqing Chen
