Biomineralization of Gold: Biofilms on Bacterioform Gold

Bacterial biofilms are associated with secondary gold grains from two sites in Australia. 16S ribosomal DNA clones of the genus Ralstonia that bear 99% similarity to the bacterium Ralstonia metallidurans--shown to precipitate gold from aqueous gold(III) tetrachloride--were present on all DNA-positiv...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 2006-07, Vol.313 (5784), p.233-236
Main Authors: Reith, Frank, Rogers, Stephen L, McPhail, D.C, Webb, Daryl
Format: Article
Language:English
Subjects:
Acid soils
Bacteria
Bacteria - classification
Bacteria - isolation & purification
Bacteria - metabolism
Biofilms
Biohydrometallurgy. Microbial leaching
Biological and medical sciences
Biotechnology
Cell membranes
Cell walls
Chemical Precipitation
Chlorides - metabolism
Deoxyribonucleic acid
DNA
DNA, Ribosomal - genetics
Drug Resistance, Bacterial
Fundamental and applied biological sciences. Psychology
Gold
Gold - analysis
Gold - metabolism
Gold - toxicity
Gold mining
Industrial applications and implications. Economical aspects
Materials
Microbiology
Microscopy, Electron, Scanning
Mining
New South Wales
Oxidation-Reduction
Polymerase Chain Reaction
Queensland
Ralstonia
Ralstonia - drug effects
Ralstonia - isolation & purification
Ralstonia - metabolism
Ralstonia - ultrastructure
Ralstonia metallidurans
Ribosomal DNA
RNA, Ribosomal, 16S - genetics
Soil - analysis
Soil bacteria
Soil Microbiology
Solubility
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Summary:Bacterial biofilms are associated with secondary gold grains from two sites in Australia. 16S ribosomal DNA clones of the genus Ralstonia that bear 99% similarity to the bacterium Ralstonia metallidurans--shown to precipitate gold from aqueous gold(III) tetrachloride--were present on all DNA-positive gold grains but were not detected in the surrounding soils. These results provide evidence for the bacterial contribution to the authigenic formation of secondary bacterioform gold grains and nuggets.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.1125878