What are 'de novo proteins' and why are they a 2025 breakthrough?

The answer

De novo protein design - creating entirely new proteins that don't exist in nature - emerged as a major breakthrough in 2025. Using AI tools like David Baker's Nobel Prize-winning RosettaFold and AlphaFold, scientists can now design custom enzymes, binding proteins, and molecular machines from first principles. These designed-from-scratch proteins can perform tasks evolution never addressed: breaking down plastic waste, neutralizing specific toxins, or catalyzing chemical reactions for sustainable manufacturing. The breakthrough means humanity is no longer limited to the protein toolkit that billions of years of evolution produced - we can now engineer molecular machines for any purpose, from carbon capture to targeted drug delivery.