Fungal decarboxylases in the isopenicillin N synthase subfamily exhibit unique N- and C-terminal insertions, but the mechanistic roles of these elements remain largely elusive. Here, the authors report crystal structures of TraH in complex with various substrates, showing an N-terminal lid loop that undergoes substrate-dependent rearrangements, facilitating a distinct decarboxylation mechanism.
- Xuehua Zheng
- Rui Ge
- Liujuan Zheng