In Nature, Proteins Sweep up Nanoparticles

Here’s a pollution-control tip from nature: Deep inside a flooded mine in Wisconsin, scientists from several institutions including the U.S. Department of Energy’s Lawrence Berkeley National Laboratory (Berkeley Lab) have discovered a world in which bacteria emit proteins that sweep up metal nanoparticles into immobile clumps. Their finding may lead to innovative ways to remediate subsurface metal toxins. “We have found, in the environment, that cells release proteins and polypeptides which promote the aggregation of nanoparticulate metals,” says John Moreau, lead author of the study and a former PhD student in UC Berkeley’s Department of Earth and Planetary Sciences.