We were trying to Terraform Mars but instead we saved the sea snails
a day ago
- #synthetic biology
- #terraforming
- #enzyme engineering
- Using the imaginative goal of terraforming Mars as a constraint spurred creative scientific thinking, leading to innovations in enzyme engineering.
- The project focused on engineering halogenase enzymes to interact with halogenated greenhouse gases like CFCs, which are potent but problematic.
- A novel biosensor using aminoacyl tRNA synthetases (AARS) was developed to detect halogenation in cells, enabling continuous evolution of enzymes.
- The evolved halogenase, RebHEvo4, showed ~40x higher activity and better solubility than natural versions, making it suitable for industrial use.
- Practical applications include producing halogenated antimicrobial peptides (which kill bacteria by damaging membranes) and eco-friendly biomanufacturing of pigments like Tyrian purple, traditionally made from sea snails.
- Despite advances making CFCs unnecessary for terraforming (e.g., metallic glitter proposals), the project yielded valuable tools for therapeutics and green chemistry on Earth.
- The approach highlights how 'weird' constraints can drive practical innovation, fostering creativity by reframing familiar problems in new contexts.