The molecular geomicrobiology of bacterial manganese(II) oxidation

Bradley Tebo, Kati Geszvain, Sung Woo Lee

Research output: Chapter in Book/Report/Conference proceedingChapter

20 Citations (Scopus)

Abstract

Manganese is the second most abundant transition metal found in the Earth's crust. It has a significant biological role as it is a cofactor of enzymes such as superoxide dismutase and is the key metal in the reaction center of photosystem II. In the environment, manganese is mostly found in three different oxidation states: II, III, and IV. Mn(II), primarily occurring as the soluble Mn2+ species, is the thermodynamically favored state at low pH and Eh while insoluble Mn(III) and Mn(IV) oxides are favored at high pH and Eh. Thus, studies of Mn in the environment have almost always employed this paradigm for defining different Mn phases based on operational definitions: Mn that passes through a 0.2 or 0.4 μm filter is defined as soluble Mn(II) while Mn that is trapped by the filter are the solid phase Mn(III,IV) oxides. Soluble Mn species other than Mn(II) were thought not to be important because Mn(III) ions are not stable in solution and rapidly disproportionate to Mn(II) and Mn(IV). However, recent work on the mechanism of bacterial Mn(II) oxidation has demonstrated that Mn(III) occurs as an intermediate in the oxidation of Mn(II) to Mn(IV) oxides (Webb et al. 2005b; Parker et al. 2007; Anderson et al. 2009b) and that a variety of inorganic and organic ligands can complex Mn(III) and render it relatively stable in solution. In this article we review these new insights into the molecular mechanism of bacterial Mn(II) oxidation and recent advances in our understanding of Mn(II) oxidation in the environment. The study of the importance of Mn in the environment needs to employ the new paradigm for Mn cycling which takes into account the role of soluble Mn(III) species.

Original languageEnglish (US)
Title of host publicationGeomicrobiology: Molecular and Environmental Perspective
PublisherSpringer Netherlands
Pages285-308
Number of pages24
ISBN (Print)9789048192038
DOIs
StatePublished - 2010

Fingerprint

Manganese
manganese
oxidation
Oxides
oxides
Metals
transition elements
Photosystem II Protein Complex
Coenzymes
Superoxide Dismutase
photosystem II
Ions
Ligands
superoxide dismutase
metals
ions
enzymes

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)

Cite this

Tebo, B., Geszvain, K., & Lee, S. W. (2010). The molecular geomicrobiology of bacterial manganese(II) oxidation. In Geomicrobiology: Molecular and Environmental Perspective (pp. 285-308). Springer Netherlands. https://doi.org/10.1007/978-90-481-9204-5_13

The molecular geomicrobiology of bacterial manganese(II) oxidation. / Tebo, Bradley; Geszvain, Kati; Lee, Sung Woo.

Geomicrobiology: Molecular and Environmental Perspective. Springer Netherlands, 2010. p. 285-308.

Research output: Chapter in Book/Report/Conference proceedingChapter

Tebo, B, Geszvain, K & Lee, SW 2010, The molecular geomicrobiology of bacterial manganese(II) oxidation. in Geomicrobiology: Molecular and Environmental Perspective. Springer Netherlands, pp. 285-308. https://doi.org/10.1007/978-90-481-9204-5_13
Tebo B, Geszvain K, Lee SW. The molecular geomicrobiology of bacterial manganese(II) oxidation. In Geomicrobiology: Molecular and Environmental Perspective. Springer Netherlands. 2010. p. 285-308 https://doi.org/10.1007/978-90-481-9204-5_13
Tebo, Bradley ; Geszvain, Kati ; Lee, Sung Woo. / The molecular geomicrobiology of bacterial manganese(II) oxidation. Geomicrobiology: Molecular and Environmental Perspective. Springer Netherlands, 2010. pp. 285-308
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