Fig.1 Light-powering acceleration of ATP-driven production of useful chemical in E. coli expressing rhodopsin. (IMAGE)
Caption
Generally, E. coli pumps protons into extracellular space by the respiratory chain with consuming carbon atoms in the TCA cycle, produces ATP by ATP synthase using the generated proton gradient across the membrane, and drives various metabolic activities using the ATP. In contrast, our engineered E. coli expressing rhodopsin can pump proton using light energy and produce ATP without losing carbon atoms as CO2. Therefore, the cell can effectively produce some useful chemicals that require ATP for the synthesis.
Credit
Kiyotaka Y. Hara
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