ArticleMicrobiologyOpen2022
Geobacter sulfurreducens metabolism at different donor/acceptor ratios.
Article in MicrobiologyOpen, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Environmental considerations and bioremediation applications of the metal-, nitrate-, and organohalide-respiring bacteriumApplied and environmental microbiology · 2026Review
- Propionate oxidation byApplied and environmental microbiology · 2026Article
- Electron transport across the cell envelope via multihemeFrontiers in chemistry · 2025Review
- Geobacter sulfurreducens metabolism at different donor/acceptor ratios.MicrobiologyOpen · 2022Article
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Authors and funding
2 authors.
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No grant is acknowledged in the PubMed record.
Abstract
Geobacter species have great application potential in remediation processes and electrobiotechnology. In all applications, understanding the metabolism will enable target-oriented optimization of the processes. The typical electron donor and carbon source of the Geobacter species is acetate, while fumarate is the usual electron acceptor. Here, we could show that depending on the donor/acceptor ratio in batch cultivation of Geobacter sulfurreducens different product patterns occur. With a donor/acceptor ratio of 1:2.5 malate accumulated as an intermediate product but was metabolized to succinate subsequently. At the end of the cultivation, the ratio of fumarate consumed and succinate produced was approximately 1:1. When fumarate was added in excess, malate accumulated in the fermentation broth without further metabolization. After the addition of acetate to stationary cells, malate concentration decreased immediately and additional succinate was synthesized. Finally, it was shown that also resting cells of G. sulfurreducens could efficiently convert fumarate to malate without an additional electron donor. Overall, it was demonstrated that by altering the donor/acceptor ratio, targeted optimization of the metabolite conversion by G. sulfurreducens can be realized.
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