Geomicrobiology of manganese(II) oxidation

Tebo, Bradley M.; Johnson, Hope A.; McCarthy, James K.; Templeton, Alexis S.

doi:10.1016/j.tim.2005.07.009

Cited by 603 publications

(425 citation statements)

References 54 publications

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“…2.7 Ga (Godfrey and Falkowski, 2009;Thomazo et al, 2011), and the latter being evident from negligible sulfur isotopic fractionations in the Archaean sedimentary sulfide record (e.g., Strauss, 2003). The supply of MnO 2 was likely also not significant until after the GOE, due to the oxidation of dissolved Mn(II) requiring the presence of free dissolved oxygen and an aerobic microbial catalyst (e.g., Tebo et al, 2005), although the plausibility of a Mn(II)-based photosynthesis pre-dating the rise of oxygen has been hypothesised , but not confirmed in modern cultures.…”

Section: Available Reductants and Diagenesis Of Iron Formationsmentioning

confidence: 99%

Iron formations: A global record of Neoarchaean to Palaeoproterozoic environmental history

Konhauser

Planavsky

Hardisty

et al. 2017

Earth-Science Reviews

332

238

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Section: Available Reductants and Diagenesis Of Iron Formationsmentioning

confidence: 99%

Iron formations: A global record of Neoarchaean to Palaeoproterozoic environmental history

Konhauser

Planavsky

Hardisty

et al. 2017

Earth-Science Reviews

332

238

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“…1, the metal cations to the left of the square brackets are hydrated interlayer species balancing the negative structural charge have been measured by Villalobos et al (2003) and Duckworth and Sposito (2007). Biogenic birnessite minerals such as this are typically found enmeshed in an organic matrix of bacterial cells and extracellular polymeric substances (Tebo et al, 2004;Tebo et al, 2005;Toner et al, 2005a), thus forming heterogeneous biomass-mineral assemblages that contain a variety of reactive organic functional groups, such as -COOH, -CHOH, -PO 4 H 3 , -SH, and -NH 2 (Fein et al, 2001;Warren and Haack, 2001;Toner et al, 2005b;Sposito, 2008), as well as mineral sorption sites.…”

Section: Introductionmentioning

confidence: 99%

Mechanisms of nickel sorption by a bacteriogenic birnessite

Peña

Kwon

Refson

et al. 2010

Geochimica et Cosmochimica Acta

118

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Bacteriogenic birnessite nanoparticles have a large capacity to adsorb metal cations due to their high proportion of cation vacancy defects. In the current study, a synergistic experimental-computational approach was used to study the molecular-scale mechanisms of Ni sorption at varying loadings and at pH 6-8 using the hexagonal birnessite produced by Pseudomonas putida GB-1. We found that Ni is scavenged effectively by the biomass-

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“…Oxidation of Mn(II) by molecular oxygen, however, may occur at mineral surfaces (5) or in the presence of high-affinity ligands (6). Within the environment, the oxidation of Mn(II) is thought to be primarily a consequence of biological activity (7). However, despite their environmental, public health, and biotechnological relevance, the biochemical pathways and physiological basis for microbial oxidation of Mn(II) to Mn oxides remains enigmatic.…”

mentioning

confidence: 99%

Mn(II) oxidation by an ascomycete fungus is linked to superoxide production during asexual reproduction

Hansel

Zeiner

Santelli

et al. 2012

Proc. Natl. Acad. Sci. U.S.A.

181

156

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Manganese (Mn) oxides are among the most reactive minerals within the environment, where they control the bioavailability of carbon, nutrients, and numerous metals. Although the ability of microorganisms to oxidize Mn(II) to Mn(III/IV) oxides is scattered throughout the bacterial and fungal domains of life, the mechanism and physiological basis for Mn(II) oxidation remains an enigma. Here, we use a combination of compound-specific chemical assays, microspectroscopy, and electron microscopy to show that a common Ascomycete filamentous fungus, Stilbella aciculosa , oxidizes Mn(II) to Mn oxides by producing extracellular superoxide during cell differentiation. The reactive Mn oxide phase birnessite and the reactive oxygen species superoxide and hydrogen peroxide are colocalized at the base of asexual reproductive structures. Mn oxide formation is not observed in the presence of superoxide scavengers (e.g., Cu) and inhibitors of NADPH oxidases (e.g., diphenylene iodonium chloride), enzymes responsible for superoxide production and cell differentiation in fungi. Considering the recent identification of Mn(II) oxidation by NADH oxidase-based superoxide production by a common marine bacterium ( Roseobacter sp.), these results introduce a surprising homology between some prokaryotic and eukaryotic organisms in the mechanisms responsible for Mn(II) oxidation, where oxidation appears to be a side reaction of extracellular superoxide production. Given the versatility of superoxide as a redox reactant and the widespread ability of fungi to produce superoxide, this microbial extracellular superoxide production may play a central role in the cycling and bioavailability of metals (e.g., Hg, Fe, Mn) and carbon in natural systems.

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Geomicrobiology of manganese(II) oxidation

Cited by 603 publications

References 54 publications

Iron formations: A global record of Neoarchaean to Palaeoproterozoic environmental history

Iron formations: A global record of Neoarchaean to Palaeoproterozoic environmental history

Mechanisms of nickel sorption by a bacteriogenic birnessite

Mn(II) oxidation by an ascomycete fungus is linked to superoxide production during asexual reproduction

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