PMID: 9546169Apr 18, 1998Paper

Bacterial oxidation of mercury metal vapor, Hg(0)

Applied and Environmental Microbiology
T SmithA O Summers

Abstract

We used metalloregulated luciferase reporter fusions and spectroscopic quantification of soluble Hg(II) to determine that the hydroperoxidase-catalase, KatG, of Escherichia coli can oxidize monatomic elemental mercury vapor, Hg(0), to the water-soluble, ionic form, Hg(II). A strain with a mutation in katG and a strain overproducing KatG were used to demonstrate that the amount of Hg(II) formed is proportional to the catalase activity. Hg(0) oxidation was much decreased in stationary-phase cells of a strain lacking KatG, suggesting that the monofunctional hydroperoxidase KatE is less effective at this reaction. Unexpectedly, Hg(0) oxidation also occurred in a strain lacking both KatE and KatG, suggesting that activities other than hydroperoxidases may carry out this reaction. Two typical soil bacteria, Bacillus and Streptomyces, also oxidize Hg(0) to Hg(II). These observations establish for the first time that bacteria can contribute, as do mammals and plants, to the oxidative phase of the global Hg cycle.

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Citations

Aug 26, 2014·Frontiers in Microbiology·Lorrie MaccarioCatherine Larose
Dec 22, 2006·PloS One·Iván L CalderónClaudio C Vásquez
Jul 10, 2012·Applied and Environmental Microbiology·Zachary FreedmanTamar Barkay
Jan 4, 2007·FEMS Microbiology Ecology·Tamar Barkay, Alexandre J Poulain
Feb 18, 2014·Metallomics : Integrated Biometal Science·Daniel S Grégoire, A J Poulain
Jun 28, 2003·FEMS Microbiology Reviews·Tamar BarkayAnne O Summers
Nov 27, 2020·FEMS Microbiology Letters·Yuwei WangNathan Yee
Jan 27, 2019·The Science of the Total Environment·Z S HuangX Zhang
Jun 4, 2017·Environmental Pollution·Hansell Gonzalez-RaymatYong Cai
Nov 19, 2003·Microbes and Infection·Andréa de Lima PimentaMark A Blight
May 31, 2012·Environmental Science & Technology·Valérie DaguenéAlexandre J Poulain
Jan 20, 2019·Biochimica Et Biophysica Acta. General Subjects·Pablo A NogaraJoão B T Rocha
Aug 19, 2007·Chemosphere·Ligy Philip, Marc A Deshusses
Jul 27, 2002·Environmental Science & Technology·Steven D SicilianoD R S Lean

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