Methanococcus igneus sp. nov., a Novel Hyperthermophilic Methanogen from a Shallow Submarine Hydrothermal System

Burggraf, Siegfried; Fricke, Hans; Neuner, Annemarie; Kristjánsson, Jakob K.; Rouvier, Pierre; Mandelco, Linda; Woese, Carl R.; Stetter, Karl O.

doi:10.1016/s0723-2020(11)80197-9

Cited by 131 publications

(55 citation statements)

References 31 publications

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“…The L12 stalk entails ribosomal protein L10 (or its archaeal and eukaryotic orthologue P0 in the P-stalk) and multiple copies of protein L12 (P1/P2 in eukaryotes 1 ). The L12 stalk is required for translation, because it recruits to the ribosome the auxiliary translation factors, in particular translational GTPases, such as initiation factor 2, elongation factors Tu and G, and release factor 3 or their eukaryotic homologues [2][3][4][5][6][7][8] , and accelerates GTPase activity of some of them 3,[9][10][11] . The mitochondrial homologue of L12, MRPL12, not only has an important role in translation but also regulates the transcription in mitochondria 12 .…”

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confidence: 99%

Evolution of the protein stoichiometry in the L12 stalk of bacterial and organellar ribosomes

et al. 2013

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The emergence of ribosomes and translation factors is central for understanding the origin of life. Recruitment of translation factors to bacterial ribosomes is mediated by the L12 stalk composed of protein L10 and several copies of protein L12, the only multi-copy protein of the ribosome. Here we predict stoichiometries of L12 stalk for 41,200 bacteria, mitochondria and chloroplasts by a computational analysis, and validate the predictions by quantitative mass spectrometry. The majority of bacteria have L12 stalks allowing for binding of four or six copies of L12, largely independent of the taxonomic group or living conditions of the bacteria, whereas some cyanobacteria have eight copies. Mitochondrial and chloroplast ribosomes can accommodate six copies of L12. The last universal common ancestor probably had six molecules of L12 molecules bound to L10. Changes of the stalk composition provide a unique possibility to trace the evolution of protein components of the ribosome.

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confidence: 99%

Evolution of the protein stoichiometry in the L12 stalk of bacterial and organellar ribosomes

et al. 2013

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“…Cultures were inspected by light microscopy as described by Burggraf et al (1990). Electron microscopy was performed as described previously (König and Stetter, 1982).…”

Section: Strains Acidianus Infernusmentioning

confidence: 99%

“…The most extremely thermophilic organisms known up to now belong to the Archaea (previously: archaebacteria), the third domain of life besides the Bacteria and the Eucarya (Woese et al, 1978;Woese et al, 1990). These hyperthermophiles are the archaeal sulfur metabolizers and some methanogens, growing optimally at temperatures above 80 °C {Stetter, 1982;Stetter, 1986;Burggraf et al, 1990;.…”

Section: Introductionmentioning

confidence: 99%

“…These hyperthermophiles are the archaeal sulfur metabolizers and some methanogens, growing optimally at temperatures above 80 °C {Stetter, 1982;Stetter, 1986;Burggraf et al, 1990;. Thermotoga maritima and the closely related Thermotoga neapolitana are the only bacterial hyperthermophilic species known with optimal growth at 80 °C (Huber et al, 1986 b;Jannasch et al, 1988;Windberger et al, 1989).…”

Section: Introductionmentioning

confidence: 99%

“…Thermotoga maritima and the closely related Thermotoga neapolitana are the only bacterial hyperthermophilic species known with optimal growth at 80 °C (Huber et al, 1986 b;Jannasch et al, 1988;Windberger et al, 1989). Thermotoga represents the deepest phylogenetic branch-off within the bacterial domain {Huber Woese, 1987;Woese et al, 1990). Due to their exceptional position in the evolution of life and their outstanding cellular properties, hyperthermophiles are of great interest for microbiology and biotechnology.…”

Section: Introductionmentioning

confidence: 99%

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Hyperthermophilic Archaea and Bacteria Occurring within Indonesian Hydrothermal Areas

Huber

Jones

et al. 1991

Systematic and Applied Microbiology

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SummaryFrom 85 samples taken during cruise 45B of the R/V SONNE within the Sunda Arc subduction zone and from solfatara fields in Java, thermophilic and hyperthermophilic archaea and bacteria were isolated. The archaea were found to belong to the genera Methanol? act er tum, Methanolobus, Methajtosarcina, Acidianus, Thermoproteus, Desulfurococcus, Thermoplasma, Thermococcus and a so far unknown thermoacidophilic continental metal mobilizer. All 7 Thermoplasma isolates were found to represent a new genotype so far only found in Indonesia. The extremely thermophilic bacterial isolates are a new species of Thermotoga and a novel strict anaerobe, thriving by H2/NOj~ autotrophy.

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Hydrogen transfer between methanogens and fermentative heterotrophs in hyperthermophilic cocultures

Muralidharan

Rinker

Hirsh

et al. 1997

Biotechnol. Bioeng.

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Interactions involving hydrogen transfer were studied in a coculture of two hyperthermophilic microorganisms: Thermotoga maritima, an anaerobic heterotroph, and Methanococcus jannaschii, a hydrogenotrophic methanogen. Cell densities of T. maritima increased 10‐fold when cocultured with M. jannaschii at 85°C, and the methanogen was able to grow in the absence of externally supplied H2 and CO2. The coculture could not be established if the two organisms were physically separated by a dialysis membrane, suggesting the importance of spatial proximity. The significance of spatial proximity was also supported by cell cytometry, where the methanogen was only found in cell sorts at or above 4.5 μm in samples of the coculture in exponential phase. An unstructured mathematical model was used to compare the influence of hydrogen transport and metabolic properties on mesophilic and hyperthermophilic cocultures. Calculations suggest the increases in methanogenesis rates with temperature result from greater interactions between the methanogenic and fermentative organisms, as evidenced by the sharp decline in H2 concentration in the proximity of a hyperthermophilic methanogen. The experimental and modeling results presented here illustrate the need to consider the interactions within hyperthermophilic consortia when choosing isolation strategies and evaluating biotransformations at elevated temperatures. © 1997 John Wiley & Sons, Inc. Biotechnol Bioeng 56: 268–278, 1997.

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Methanococcus igneus sp. nov., a Novel Hyperthermophilic Methanogen from a Shallow Submarine Hydrothermal System

Cited by 131 publications

References 31 publications

Evolution of the protein stoichiometry in the L12 stalk of bacterial and organellar ribosomes

Evolution of the protein stoichiometry in the L12 stalk of bacterial and organellar ribosomes

Hyperthermophilic Archaea and Bacteria Occurring within Indonesian Hydrothermal Areas

Hydrogen transfer between methanogens and fermentative heterotrophs in hyperthermophilic cocultures

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