Google DeepMind has introduced SynthID Bio, a proof-of-concept technology that embeds imperceptible watermarks directly into the biological code of AI-designed proteins and structures. This approach ensures the signature is verifiable on the synthesized physical protein itself while preserving its biological function.
- The method adapts to data type by guiding amino acid choices for sequences or adjusting atomic coordinates for 3D structures.
- Watermarked protein binders matched unwatermarked versions in hit rate, binding affinity, and natural sequence diversity across targets like VEGF-A and SARS-CoV-2 spike protein RBD.
- For folding, SynthID Bio fine-tunes AlphaFold 3’s diffusion network to embed detectable signatures in model weights without reducing prediction accuracy.
- The system also successfully watermarked the genome of an Evo 2-designed bacteriophage, with early testing confirming functionality in bacteria cultures.
SynthID Bio aims to strengthen biosecurity by providing a tangible verification layer for DNA synthesis screening and maintaining the integrity of public databases like the Protein Data Bank.