Enzymatic Approaches for Next Generation Peptide Synthesis

Peptide synthesis still relies on a method from 1963 that uses large volumes of toxic solvents and wasteful chemical protecting groups. The ENGPEP project aims to replace this outdated chemistry with engineered enzymes—ligases designed to stitch amino acids together without those harmful reagents. This matters because current solid-phase peptide synthesis has not advanced in its core principles for decades, despite being essential for producing many life-saving pharmaceuticals. The process generates significant environmental damage through the sheer quantity of deleterious solvents and reagents it requires. If successful, enzymatic peptide synthesis would be a step change for pharmaceutical manufacturing. It could enable cleaner, more efficient production of peptide-based drugs that are already widely used, while reducing the environmental footprint of their manufacture. The approach also opens the door to coupling amino acids and other precursors without protecting groups, which current chemistry cannot easily do. This is a fundamental advance in synthetic methodology—not a new drug itself, but a better way to make many existing and future peptide therapeutics.