1 / 6

Geobacter metallireducens

Geobacter metallireducens. Gram-negative rod Obligate anaerobe Preliminary genome sequence by the Joint Genome Institute Dissimilatory iron-reducing bacterium (uses iron as a terminal electron acceptor in place of oxygen). Geobacter Ecology.

shanna
Download Presentation

Geobacter metallireducens

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Geobacter metallireducens • Gram-negative rod • Obligate anaerobe • Preliminary genome sequence by the Joint Genome Institute • Dissimilatory iron-reducing bacterium (uses iron as a terminal electron acceptor in place of oxygen)

  2. Geobacter Ecology • Ubiquitously found in a wide variety of aquatic sediments (both shallow and deep subsurface) • Found in both contaminated and pristine sites. • Contaminated sites include landfill leachate and petroleum-contaminated aquifers • Enrichment of native Geobacter populations occur in response to stimulation of Fe(III)-reducing conditions in natural aquifers

  3. Bioremediation Potential • Bioreduction of soluble U(VI) to insoluble U(IV) by Geobacter represents a potential strategy for immobilization of uranium in contaminated sites (dissimilatory process) • Other toxic metals which Geobacter can reduce include chromium, technetium and cobalt (note this is a non-dissimilatory process)

  4. Geobacter chemotaxis • flagella and pili synthesis is induced by the presence of Fe(III) or Mn(IV) solids • displays chemotactic behavior towards soluble Fe(II) and Mn(II), with these reduced metals being released by the Fe(III) and Mn(IV) solids

  5. Fe required >50 µM for continuous cultivation on nitrate

  6. References D. R. Lovley University of Massachusetts Amherst, MA J. R. Lloyd The University of Manchester Manchester, UK J. D. Coates Southern Illinois University Carbondale, IL

More Related