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Biogeographical distribution and diversity of microbes in methane hydrate-bearing deep marine sediments on the Pacific Ocean Margin.
- F. Inagaki, T. Nunoura, B. Jørgensen
- Environmental Science, GeographyProceedings of the National Academy of Sciences…
- 21 February 2006
Results from cluster and principal component analyses, which include previously reported data from the West and East Pacific Margins, suggest that, for these locations in the Pacific Ocean, prokaryotic communities from methane hydrate-bearing sediment cores are distinct from those in Hydrate-free cores.
Asgard archaea illuminate the origin of eukaryotic cellular complexity
The results expand the known repertoire of ‘eukaryote-specific’ proteins in Archaea, indicating that the archaeal host cell already contained many key components that govern eukaryotic cellular complexity.
Cell proliferation at 122°C and isotopically heavy CH4 production by a hyperthermophilic methanogen under high-pressure cultivation
- K. Takai, Kentaro Nakamura, K. Horikoshi
- EngineeringProceedings of the National Academy of Sciences
- 5 August 2008
Under conventional growth conditions, the isotope fractionation of methanogenesis by M. kandleri strain 116 was similar to values previously reported for other hydrogenotrophic methanogens, but under high hydrostatic pressures, the atom fractionation effect became much smaller, and the kinetic isotope effect was one of the smallest effects ever reported.
Insights into the evolution of Archaea and eukaryotic protein modifier systems revealed by the genome of a novel archaeal group
The genome sequence of Candidatus ‘Caldiarchaeum subterraneum’ is shown that represents an uncultivated crenarchaeotic group and indicates that a prototype of the eukaryotic protein modifier system is present in the Archaea.
Distribution, phylogenetic diversity and physiological characteristics of epsilon-Proteobacteria in a deep-sea hydrothermal field.
- S. Nakagawa, K. Takai, Y. Sako
- Biology, Environmental ScienceEnvironmental microbiology
- 1 October 2005
Results provide new insight into the ecophysiological characteristics of the deep-sea hydrothermal vent epsilon-Proteobacteria, which has never been assessed by comparative analysis of the 16S rRNA genes.
Enzymatic and Genetic Characterization of Carbon and Energy Metabolisms by Deep-Sea Hydrothermal Chemolithoautotrophic Isolates of Epsilonproteobacteria
The enzymatic and genetic characteristics described here were consistent with cellular carbon and energy metabolisms and suggest that molecular tools may have great potential for in situ elucidation of the ecophysiological roles of deep-sea Epsilonproteobacteria.
Variability in microbial community and venting chemistry in a sediment-hosted backarc hydrothermal system: Impacts of subseafloor phase-separation.
Fungal diversity in deep-sea sediments – the presence of novel fungal groups
Isolation and phylogenetic diversity of members of previously uncultivated ε-Proteobacteria in deep-sea hydrothermal fields
We report the successful cultivation and partial characterization of novel members of ɛ-Proteobacteria, which have long been recognized solely as genetic signatures of small subunit ribosomal RNA…
Hadal biosphere: Insight into the microbial ecosystem in the deepest ocean on Earth
- T. Nunoura, Y. Takaki, K. Takai
- Environmental Science, GeographyProceedings of the National Academy of Sciences
- 23 February 2015
The enrichment of heterotrophic population in the hadal water (6,000 ∼10,257 m) microbial communities, whereas the chemolithotrophic populations were more abundant in the upper abyssal waters, suggested that thehadal microbial biosphere was supported by the endogenous recycling of organic matter in theHadal waters associated with the trench geomorphology.