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Biogenic manganese oxides: Properties and mechanisms of formation
▪ Abstract Manganese(IV) oxides produced through microbial activity, i.e., biogenic Mn oxides or Mn biooxides, are believed to be the most abundant and highly reactive Mn oxide phases in the
Evidence for the presence of Mn(III) intermediates in the bacterial oxidation of Mn(II).
TLDR
It is shown that Mn(II) oxidation by spores of the marine Bacillus sp.
Community-wide analysis of microbial genome sequence signatures
TLDR
It is found that shared environmental pressures and interactions among coevolving organisms do not obscure genome signatures in acid mine drainage communities and genome signatures can be used to assign sequence fragments to populations, an essential prerequisite if metagenomics is to provide ecological and biochemical insights into the functioning of microbial communities.
Enigmatic, ultrasmall, uncultivated Archaea
Metagenomics has provided access to genomes of as yet uncultivated microorganisms in natural environments, yet there are gaps in our knowledge—particularly for Archaea—that occur at relatively low
Direct Identification of a Bacterial Manganese(II) Oxidase, the Multicopper Oxidase MnxG, from Spores of Several Different Marine Bacillus Species
TLDR
The results provide the first direct identification of a bacterial enzyme that catalyzes Mn(II) oxidation and suggest that MnxG catalyzes two sequential one-electron oxidations from Mn (II) to Mn(III) and from Mn( III) tomn(IV), a novel type of reaction for a multicopper oxidase.
Evidence for hydrogen oxidation and metabolic plasticity in widespread deep-sea sulfur-oxidizing bacteria
TLDR
Deep-sea populations of the SUP05 group of uncultured sulfur-oxidizing Gammaproteobacteria, which are abundant in widespread and diverse marine environments, contain and highly express genes encoding group 1 Ni, Fe hydrogenase enzymes for H2 oxidation, revealing the potential importance of H2 as a key energy source in the deep ocean.
Genomic resolution of linkages in carbon, nitrogen, and sulfur cycling among widespread estuary sediment bacteria
TLDR
This dataset was able to chart the flow of carbon and nutrients through the multiple geochemical layers of bacterial processing and reveal potential ecological interactions within the communities.
Biotransformations of Manganese
The redox properties of manganese (Mn), make it central to a variety of biological processes and result in significant and often rapid biogeochemical cycling that is mediated by abiotic and biotic
Manganese(II)-Oxidizing Bacillus Spores in Guaymas Basin Hydrothermal Sediments and Plumes
TLDR
In isolation of a number of diverse spore-forming Mn(II)-oxidizing Bacillus species from Guaymas Basin, a deep-sea hydrothermal vent environment in the Gulf of California, it is suggested that in hydroThermal sediments they are likely present as spores that are active in oxidizing Mn( II) as it emerges from the seafloor.
Genomic evidence for distinct carbon substrate preferences and ecological niches of Bathyarchaeota in estuarine sediments.
TLDR
Genes encoding enzymes involved in acetate production as well as in the reductive acetyl-CoA pathway were detected in all four genomes inferring that these Archaea are organo-heterotrophic and autotrophic acetogens.
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