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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
Evidence for the involvement of betaproteobacterial Thiobacilli in the nitrate-dependent oxidation of iron sulfide minerals.
The Thiobacilli are an important group of autotrophic bacteria occurring in nature linking the biogeochemical cycles of sulfur and nitrogen. Betaproteobacterial Thiobacilli are very likely candidates for mediating the process of nitrate-dependent anoxic iron sulfide mineral oxidation in freshwater wetlands. A Thiobacillus denitrificans-like bacterium was present in an enrichment on thiosulfate and nitrate, derived from an iron-sulfide- and nitrate-rich freshwater environment. Preliminary FISH analysis showed that the 16S rRNA gene-based bacterial probe mix showed great variation in intensity under different culture conditions. Furthermore, the widely applied 23S rRNA gene-based probe set BET42a/GAM42a incorrectly identified the T. denitrificans-like bacterium as a member of the Gammaproteobacteria. To circumvent these problems, the 23S rRNA genes of two T. denitrificans strains were partially sequenced and a new 23S rRNA gene-based probe (Betthio 1001) specific for betaproteobacterial Thiobacilli was designed. Use of this new probe Betthio 1001, combined with field measurements, indicates the involvement of Thiobacilli in the process of nitrate-dependent iron sulfide mineral oxidation.[1]
