Nature Communications: Manchester Team Reports Alternative Enzymatic Pathway to Penicillins via Standalone Ligase Plus Engineered IPNS
Saha, Xu, Panda, and Micklefield at the University of Manchester and Manchester Institute of Biotechnology published a Nature Communications paper April 30 describing a fundamentally simpler biosynthetic route to penicillin antibiotics. Instead of the traditional ACV tripeptide assembled by complex non-ribosomal peptide synthetase (NRPS) machinery, the team uses standalone glutathione-style ligase and epimerase enzymes to generate the peptide precursor, then transforms it with an engineered isopenicillin N synthase (IPNS) to produce penicillin G, penicillin V, and ampicillin directly. The pathway sidesteps the semisynthesis steps currently required for these penicillins and could simplify production at scale — material in an AMR landscape where supply economics matter as much as new chemistry.