Physiological responses to stress conditions and barophilic behavior of the hyperthermophilic vent archaeon Pyrococcus abyssi

Article Abstract:

The physiology of the deep-sea hyperthermophilic, anaerobic vent archaeon Pyrococcus abyssi from the Fiji Basin at a depth of 2,000 m was investigated under various conditions. Incubation under in situ pressure (20 MPa) and at 40 MPa increased the maximal and minimal growth temperatures by 4 degrees C. In situ pressure improved survival at a lethal high temperature (106 to 112 degrees C) relative to that at low pressure (0.3 MPa). The whole-cell protein profile did not change in cultures grown under low or high pressure at optimal and minimal growth temperatures.

Marine bacteria

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Minimal amino acid requirements of the hyperthermophilic archaeon Pyrococcus abyssi, isolated from deep-sea hydrothermal vents

Article Abstract:

Experimental studies using hyperthermophilic sulfur-metabolizing archaeon Pyrococcus abyssi GE5, isolated from deep-sea hydrothermal vents, reveal that growth of these species requires a minimum of nine amino acids and vitamins as the sole carbon and energy sources. Cell densities and the generation time in the minimal growth medium are measured.

Analysis, Physiological aspects, Microbial growth, Amino acids

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Characterization of a highly thermostable alkaline phosphatase from the euryarchaeon Pyrococcus abyssi

Article Abstract:

Researchers describe an alkaline phosphatase isolated from the hyperthermophilic archaeon Pyrococcus abyssi. The enzyme has a similar active site and many of the same structural elements as the Escherichia coli alkaline phosphatase.

Microbial enzymes, Phosphatases

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