AI Insight
Researchers successfully engineered E. coli bacteria to grow using carbon dioxide from the atmosphere as their sole carbon source, powered by solar energy, rather than relying on organic compounds like sugars. This was achieved through extensive genetic modifications and laboratory evolution over approximately one year, fundamentally shifting the bacteria's metabolism from heterotrophy to autotrophy. The modified bacteria can now fix CO2 using the Calvin cycle, similar to plants, while deriving energy from formate produced through renewable electricity.
Why it matters
This breakthrough could enable sustainable production of food, fuels, and useful chemicals without competing for agricultural land or relying on plant-based feedstocks. The technology demonstrates the possibility of decoupling industrial biotechnology from agriculture, potentially reducing the carbon footprint of biomanufacturing processes.
Source: Harnessing solar energy for autotrophic E. coli growth