Affiliation:
1. Institute of Biological Chemistry Academia Sinica Taipei 115 Taiwan R.O.C.
2. Chemical Biology and Molecular Biophysics Program Taiwan International Graduate Program Academia Sinica Taipei 115 Taiwan R.O.C.
3. Department of Chemistry National Tsing Hua University Hsinchu 300 Taiwan R.O.C.
Abstract
AbstractWe report the discovery and biosynthesis of new piperazine alkaloids‐arizonamides, and their derived compounds‐arizolidines, featuring heterobicyclic and spirocyclic isoquinolone skeletons, respectively. Their biosynthetic pathway involves two crucial non‐heme iron enzymes, ParF and ParG, for core skeleton construction. ParF has a dual function facilitating 2,3‐alkene formation of helvamide, as a substrate for ParG, and oxidative cleavage of piperazine. Notably, ParG exhibits catalytic versatility in multiple oxidative reactions, including cyclization and ring reconstruction. A key amino acid residue Phe67 was characterized to control the formation of the constrained arizonamide B backbone by ParG.
Funder
National Science and Technology Council