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Archaeal and bacterial communities in geochemically diverse hot springs of Yellowstone National Park, USA
TLDR
Energy-yields for a number of chemolithoautotrophic reactions are provided for >80 sampling sites in Yellowstone, showing that the knallgas reaction is just one of many exergonic reactions in the Yellowstone hot springs, that energy-y yields for certain reactions can vary substantially from one site to the next, and that few of the demonstrated exergonics reactions are known to support microbial metabolism.
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Energetics of overall metabolic reactions of thermophilic and hyperthermophilic Archaea and bacteria.
TLDR
It is shown that values of DeltaGr(0) for many microbially mediated reactions are highly temperature dependent, and that adopting values determined at 25 degrees C for systems at elevated temperatures introduces significant and unnecessary errors.
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Energetics of Overall Metabolic Reactions of Thermophilic and Hyperthermophilic Archaea and Bacteria
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Catabolic and anabolic energy for chemolithoautotrophs in deep-sea hydrothermal systems hosted in different rock types
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Energetics of amino acid synthesis in hydrothermal ecosystems.
TLDR
The synthesis of the requisite amino acids of nine thermophilic and hyperthermophilic proteins in a 100 degreesC hydrothermal solution yielded between 600 and 8000 kilojoules per mole of protein, which is energy that is available to drive the intracellular synthesis of enzymes and other biopolymers in hyperThermophiles thriving in these ecosystems.
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Energetics of chemolithoautotrophy in the hydrothermal system of Vulcano Island, southern Italy
The hydrothermal system at Vulcano, Aeolian Islands (Italy), is home to a wide variety of thermophilic, chemolithoautotrophic archaea and bacteria. As observed in laboratory growth studies, these…
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Preservation of martian organic and environmental records: final report of the Mars biosignature working group.
TLDR
This report presents the report of a working group chartered by the Co-Chairs of NASA's MSL Project Science Group, John P. Grotzinger and Michael A. Meyer, to review and evaluate potential for biosignature formation and preservation on Mars.
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Expanding frontiers in deep subsurface microbiology
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A thermodynamic assessment of energy requirements for biomass synthesis by chemolithoautotrophic micro‐organisms in oxic and anoxic environments
TLDR
Computations to quantify the amount of thermodynamic energy required to synthesize the molecular components of biomass and to compare the relative energy requirements under oxic and anoxic conditions suggest that only about 10% or less of the overall energy consumed during growth by chemolithoautotrophs is transformed directly into biomass.
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Archaeal and bacterial diversity in an arsenic-rich shallow-sea hydrothermal system undergoing phase separation
TLDR
Prokaryotic diversity in arsenic-rich shallow-sea vents off Milos Island is evaluated by comparative analysis of 16S rRNA clone sequences from two vent sites with similar pH and temperature but marked differences in salinity, suggesting arsenotrophy as an important metabolism in similar environments.
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