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A new phylum of Archaea represented by a nanosized hyperthermophilic symbiont
The cultivation of a new nanosized hyperthermophilic archaeon from a submarine hot vent is reported, which will provide insight into the evolution of thermophily, of tiny genomes and of interspecies communication. Expand
Crystal Structure of the Thermosome, the Archaeal Chaperonin and Homolog of CCT
The crystal structure of the thermosome, the archaeal group II chaperonin from T. acidophilum is determined to 2.6 A resolution and Binding of the transition state analog Mg-ADP-AIF3 suggests that the closed conformation corresponds to the ATP form. Expand
Identification of 86 candidates for small non-messenger RNAs from the archaeon Archaeoglobus fulgidus
This study identifies four candidates for H/ACA small RNAs in an archaeal species that are predicted to guide a total of six rRNA pseudouridylations, and demonstrates the importance of snmRNAs in all three domains of life. Expand
Ferroglobus placidus gen. nov., sp. nov., a novel hyperthermophilic archaeum that oxidizes Fe2+ at neutral pH under anoxic conditions
A novel coccoid, anaerobic, Fe2+-oxidizing archaeum was isolated from a shallow submarine hydrothermal system at Vulcano, Italy and represents a novel genus among the Archaeoglobales that is named Ferroglobus. Expand
Thermocrinis ruber gen. nov., sp. nov., a Pink-Filament-Forming Hyperthermophilic Bacterium Isolated from Yellowstone National Park
A novel hyperthermophilic bacterium was isolated from pink filamentous streamers occurring in the upper outflow channel of Octopus Spring in Yellowstone National Park, Wyo, and represents a new genus in the order Aquificales, the type species of which is namedThermocrinis ruber (type strain, OC 1/4 [= DSM 12173]). Expand
Microbial syntrophy: interaction for the common good.
The principles of classical and non-classical syntrophy are explained and biochemical fundamentals that allow microorganism to survive under a range of environmental conditions and to drive important biogeochemical processes are presented. Expand
Detection of 16S rDNA sequences representing the novel phylum "Nanoarchaeota": indication for a wide distribution in high temperature biotopes.
Positive PCR amplifications from Yellowstone National Park, Uzon Caldera, and an abyssal vent system obtained sequences form a cluster with the sequence of "Nanoarchaeum equitans", indicating a wide distribution of this phylum. Expand
Pyrite formation linked with hydrogen evolution under anaerobic conditions
THE formation of pyrite (FeS2), an important factor in determining the global redox balance1, has recently attracted biological interest as a possible direct source of energy for early life2–5. TheExpand
Study of the distribution of autotrophic CO2 fixation cycles in Crenarchaeota.
It is concluded that autotrophic Crenarchaeota use one of the two cycles, and that their distribution correlates with the 16S rRNA-based phylogeny of this group, rather than with the aerobic or anaerobic lifestyle. Expand
A dicarboxylate/4-hydroxybutyrate autotrophic carbon assimilation cycle in the hyperthermophilic Archaeum Ignicoccus hospitalis
This work presents the complete metabolic cycle by which the primary CO2 acceptor molecule acetyl-CoA is regenerated, and combines anaerobic metabolic modules to a straightforward and efficient CO2 fixation mechanism. Expand