Shedding New Light on Proteorhodopsin

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This overview of transmembrane fluxes and proton pumping in E.coli cell carrying proteorhodopsin show respiration and light-driven proton pumping as sources of proton motive force that can power such functions as ATP synthesis and the rotation of the ...
This overview of transmembrane fluxes and proton pumping in E.coli cell carrying proteorhodopsin show respiration and light-driven proton pumping as sources of proton motive force that can power such functions as ATP synthesis and the rotation of the flagellar motor. Credit: Berkeley Lab

New light has been shed on proteorhodopsin, the light-sensitive protein found in many marine bacteria. Researchers at the U.S. Department of Energy’s Lawrence Berkeley National Laboratory and the University of California at Berkeley have demonstrated that when the ability to respire oxygen is impaired, bacterium equipped with proteorhodopsin will switch to solar power to carry out vital life processes.


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