ZME Science
No Result
View All Result
ZME Science
No Result
View All Result
ZME Science

Home → Science → Biology

Gold-digging bacterium makes precious particles

Mihai AndreibyMihai Andrei
February 5, 2013
in Biology, Science
A A
Share on FacebookShare on TwitterSubmit to Reddit

Gold prospecting’s future may very well lie in a Petri dish – a species of bacterium forms nanoscale gold nuggets to help it to grow in toxic solutions of the precious metal, according to a new study published in Nature Chemical Biology.

gold The bacteria could be used to collect gold from mine waste, says Frank Reith, an environmental microbiologist at the University of Adelaide in Australia, who works on gold-processing bacteria but was not involved in the study. Mining methods have an extraction efficiency that technically varies between 50% and 99% – though extremely high efficiencies are very rare.

At multiple sites, thousands of kilometres apart, researchers found the bacterium Cupriavidus metallidurans living in so-called biofilms on gold nuggets; biofilms are aggregates of microorganisms in which cells adhere to each other on a surface. The gold is toxic for the bacteria, so it detoxified dissolved gold by accumulating it in inert nanoparticles inside their cells. A definite conclusion on how that works exactly has not been published yet.

However, these biofilms also contained a second type of bacterium: Delftia acidovarans – relevant to this study; when Nathan Magarvey, a biochemist at McMaster University in Hamilton, Canada, and his team grew this species in the presence of a gold solution, they found that the bacteria colonies were surrounded by dark haloes of gold nanoparticles. They concluded that this bacteria somehow isolates the gold particles outside of its cell, unlike inside, like Cupriavidus.

They then analyzed the bacteria biochemically and genetically, finding the set of genes and a chemical metabolite that were responsible for precipitating the gold. Bacteria engineered without these genes generated no gold, and their growth was stopped by the mere presence of the element. They also isolated an entirely new chemical from the natural, non-engineered bacteria, that caused gold particles to precipitate out of a solution. The chemical was dubbed delftibactin.

It is actually possible that the two bacteria live in symbiosis, with one of them using delftibactin to diminish the soluble gold to levels that both species can cope with. But what’s more interesting from an economic point of view, is that this research paves the way for an entirely new wave type of microbe-assisted gold rush.

Via Nature

RelatedPosts

Life’s Final Flash: First-ever recorded brain activity at death reveals insight into life’s last moments
Pluto is covered in ice and has an atmosphere, new pics reveal
The “pins and needles” feeling explained
Climate change killed almost 90% of the baby coral in the Great Barrier Reef

ShareTweetShare
Mihai Andrei

Mihai Andrei

Dr. Andrei Mihai is a geophysicist and founder of ZME Science. He has a Ph.D. in geophysics and archaeology and has completed courses from prestigious universities (with programs ranging from climate and astronomy to chemistry and geology). He is passionate about making research more accessible to everyone and communicating news and features to a broad audience.

Related Posts

Art

AI-Based Method Restores Priceless Renaissance Art in Under 4 Hours Rather Than Months

byTibi Puiu
1 hour ago
News

Meet the Dragon Prince: The Closest Known Ancestor to T-Rex

byTibi Puiu
4 hours ago
Biology

Your Breathing Is Unique and Can Be Used to ID You Like a Fingerprint

byTibi Puiu
4 hours ago
Health

In the UK, robotic surgery will become the default for small surgeries

byMihai Andrei
4 hours ago

Recent news

AI-Based Method Restores Priceless Renaissance Art in Under 4 Hours Rather Than Months

June 13, 2025

Meet the Dragon Prince: The Closest Known Ancestor to T-Rex

June 13, 2025

Your Breathing Is Unique and Can Be Used to ID You Like a Fingerprint

June 13, 2025
  • About
  • Advertise
  • Editorial Policy
  • Privacy Policy and Terms of Use
  • How we review products
  • Contact

© 2007-2025 ZME Science - Not exactly rocket science. All Rights Reserved.

No Result
View All Result
  • Science News
  • Environment
  • Health
  • Space
  • Future
  • Features
    • Natural Sciences
    • Physics
      • Matter and Energy
      • Quantum Mechanics
      • Thermodynamics
    • Chemistry
      • Periodic Table
      • Applied Chemistry
      • Materials
      • Physical Chemistry
    • Biology
      • Anatomy
      • Biochemistry
      • Ecology
      • Genetics
      • Microbiology
      • Plants and Fungi
    • Geology and Paleontology
      • Planet Earth
      • Earth Dynamics
      • Rocks and Minerals
      • Volcanoes
      • Dinosaurs
      • Fossils
    • Animals
      • Mammals
      • Birds
      • Fish
      • Amphibians
      • Reptiles
      • Invertebrates
      • Pets
      • Conservation
      • Animal facts
    • Climate and Weather
      • Climate change
      • Weather and atmosphere
    • Health
      • Drugs
      • Diseases and Conditions
      • Human Body
      • Mind and Brain
      • Food and Nutrition
      • Wellness
    • History and Humanities
      • Anthropology
      • Archaeology
      • History
      • Economics
      • People
      • Sociology
    • Space & Astronomy
      • The Solar System
      • Sun
      • The Moon
      • Planets
      • Asteroids, meteors & comets
      • Astronomy
      • Astrophysics
      • Cosmology
      • Exoplanets & Alien Life
      • Spaceflight and Exploration
    • Technology
      • Computer Science & IT
      • Engineering
      • Inventions
      • Sustainability
      • Renewable Energy
      • Green Living
    • Culture
    • Resources
  • Videos
  • Reviews
  • About Us
    • About
    • The Team
    • Advertise
    • Contribute
    • Editorial policy
    • Privacy Policy
    • Contact

© 2007-2025 ZME Science - Not exactly rocket science. All Rights Reserved.