Transformation and Precipitation of Toxic Metals by Pseudomonas maltophilia
Annual rept. 1 May 1989-30 Apr 1990
MEHARRY MEDICAL COLL NASHVILLE TN
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The aims of this research are to study each of the various molecular mechanisms whereby toxic metal cations and oxyanions are chemically transformed by Pseudomonas maltophilia strain OR-02. The research effort for the current year has focused on the microbial-dependent transformations of selenite, tellurite, lead, and chromate. The reduction of selenite and tellurite to their insoluble elemental forms appeared to be mediated by an intracellular glutathione reductase that utilized the spontaneously-formed bisglutathioSe or bisglutathioTe, respectively, as pseudosubstrates. The biomolecules responsible for the extracellular transformation of lead and the reduction of chromate to CrIII are currently under investigation. This project could provide useful information toward the eventual exploitation of P. maltophilia and related organisms for the removal of toxic metal wastes from selected, heavily polluted sites.
- Water Pollution and Control