2017
DOI: 10.1016/j.cbpa.2017.03.009
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Iron assimilation and utilization in anaerobic ammonium oxidizing bacteria

Abstract: The most abundant transition metal in biological systems is iron. It is incorporated into protein cofactors and serves either catalytic, redox or regulatory purposes. Anaerobic ammonium oxidizing (anammox) bacteria rely heavily on iron-containing proteins - especially cytochromes - for their energy conservation, which occurs within a unique organelle, the anammoxosome. Both their anaerobic lifestyle and the presence of an additional cellular compartment challenge our understanding of iron processing. Here, we … Show more

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Cited by 125 publications
(48 citation statements)
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“…Iron is the fourth most abundant element in Earth’s crust ( 93 ) and plays an essential role in anammox metabolism. Energy conservation in anammox bacteria depends on iron-containing proteins (i.e., cytochromes and iron-sulfur proteins) ( 14 ). Surprisingly the proteins involved in iron transport and assimilation are still unknown.…”
Section: Supplementary Materialsmentioning
confidence: 99%
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“…Iron is the fourth most abundant element in Earth’s crust ( 93 ) and plays an essential role in anammox metabolism. Energy conservation in anammox bacteria depends on iron-containing proteins (i.e., cytochromes and iron-sulfur proteins) ( 14 ). Surprisingly the proteins involved in iron transport and assimilation are still unknown.…”
Section: Supplementary Materialsmentioning
confidence: 99%
“…S10, Table S3 and 13). The expressed siderophore-mediated transport system, which was previously believed to be absent in anammox bacteria ( 14 ), is homolog to the well-studied TonB-dependent Fe(III) uptake complex present in Gram-negative bacteria ( 94 ). Fe(III) uptake relies on beta-barrel TonB-dependent receptors in the outer membrane ( 95 ) and an energy-transducing protein complex TonB-ExbB-ExbD that links the outer with the inner membrane and generate a proton motive force ( 94 ).…”
Section: Supplementary Materialsmentioning
confidence: 99%
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“…J. caeni’ (Ali et al., ), indicating high assimilatory requirements for iron in anammox bacteria cells. Indeed, iron‐containing proteins, especially haem proteins, in anammoxosome play a key role in the energy conservation of anammox bacteria (Ferousi et al ., ; Giessen and Silver ). All the known anammox bacteria genomes carry feo B encoding a membrane‐bound ferrous iron transporter (Fig.…”
Section: Resultsmentioning
confidence: 97%