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Updated: Aug 15, 2026

Essential Metal Uptake in Gram-negative Bacteria: X-ray Fluorescence, Radioisotopes, and Cell Fractionation
Published on: February 1, 2018
The uptake and accumulation of iron by the intestinal bacterium Desulfotomaculum acetoxidans DSM 771
Ryszard Pado1, Lucyna Pawłowska-Cwiek
1Pedagogical University of Cracow, Institute of Biology, Department of Microbiology, Podbrzezie 3, 31-054 Kraków, Poland.
Abstract:
Sulfate-reducing bacteria (e.g. Desulfotomaculum acetoxidans) exist in animal intestine. These bacteria are able to bind heavy metals (e.g. cadmium or lead). Comparative investigations on the composition of cellular walls of Desulfotomaculum acetoxidans--depending on the initial Fe2+ supplement in the medium (7.5, 57.5 and 507.5 M) were performed. Iron(II) was cumulated as FeS or as pyrite (FeS2). However, if the initial amount of iron was higher, its majority (46% 85%) was transported onto the membrane. It was determined that the siderophore found in Desulfotomaculum acetoxidans was deferroxamine as in animals.
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