Bacteria Clean Up

Hair-like extensions on microbes that remove uranium and other metals from contaminated groundwater could one day help clean up after radiation spills.

By | September 7, 2011

FLICKR, J.B HILL

The bacterium Geobacter sulfurreducens lives by reducing metals, such as radioactive uranium, rendering them much less soluble and thus less of a threat to the environment. New research published yesterday (September 5) in the Proceedings of the National Academy of Sciences points to how they do it, seemingly without suffering any effects of the toxic substances. They use hair-like filaments known as pili to reduce, or add electrons to, the metal, and depositing the products of the reaction out into the environment via the pili, away from where they could harm the cell.

While it was known that G. sulfurreducens could reduce uranium, understanding how they do it could help researchers use the bacteria more effectively as bioremediators to clean up pollutants from the environment. “Current methods to stimulate the growth of these bacteria in the environment are pretty crude and empirical,” University of Massachusetts Amherst’s Derek Lovley, who recently published on the role of G. sulfurreducens’s pili in electrical conduction, told Nature. “This new mechanism will allow us to better predict how uranium can be depleted.” Furthermore, study author Gemma Reguera of Michigan State University in East Lansing is hopeful that one day the bacteria won’t be necessary at all, and bioremediation technologies could be designed based on the non-living pili. "This would allow us to work in sites where bacteria cannot live," she told Nature.

The authors also plan to see if G. sulfurreducens can also precipitate other toxic elements, such as technetium, plutonium and cobalt.

Add a Comment

Avatar of: You

You

Processing...
Processing...

Sign In with your LabX Media Group Passport to leave a comment

Not a member? Register Now!

LabX Media Group Passport Logo

Popular Now

  1. UC Berkeley Receives CRISPR Patent in Europe
    Daily News UC Berkeley Receives CRISPR Patent in Europe

    The European Patent Office will grant patent rights over the use of CRISPR in all cell types to a University of California team, contrasting with a recent decision in the U.S.

  2. DNA Replication Errors Contribute to Cancer Risk
  3. Should Healthy People Have Their Exomes Sequenced?
    Daily News Should Healthy People Have Their Exomes Sequenced?

    With its announced launch of a whole-exome sequencing service for apparently healthy individuals, Ambry Genetics is the latest company to enter this growing market. But whether these services are useful for most people remains up for debate.  

  4. Rethinking a Cancer Drug Target
    Daily News Rethinking a Cancer Drug Target

    The results of a CRISPR-Cas9 study suggest that MELK—a protein thought to play a critical role in cancer—is not necessary for cancer cell survival.

Business Birmingham