The Piezo-Hyperthermophilic Archaeon Regulates Its Energy Efficiency System to Cope With Large Hydrostatic Pressure Variations.

Deep-sea ecosystems share a common physical parameter, namely high hydrostatic pressure (HHP). Some of the microorganisms isolated at great depths have a high physiological plasticity to face pressure variations. The adaptive strategies by which deep-sea microorganisms cope with HHP variations remain to be elucidated, especially considering the extent of their biotopes on Earth.

Thermococcus piezophilus sp. nov., a novel hyperthermophilic and piezophilic archaeon with a broad pressure range for growth, isolated from a deepest hydrothermal vent at the Mid-Cayman Rise.

A novel strictly anaerobic, hyperthermophilic archaeon, designated strain CDGS, was isolated from a deep-sea hydrothermal vent in the Cayman Trough at 4964m water depth. The novel isolate is obligate anaerobe and grows chemoorganoheterotrophically with stimulation of growth by sulphur containing compounds. Its growth is optimal at 75°C, pH 6.

Complete Genome Sequence of the Hyperthermophilic and Piezophilic Archeon Thermococcus piezophilus CDGST, Able To Grow under Extreme Hydrostatic Pressures.

We report the genome sequence of Thermococcus superprofundus strain CDGS(T), a new piezophilic and hyperthermophilic member of the order Thermococcales isolated from the world's deepest hydrothermal vents, at the Mid-Cayman Rise. The genome is consistent with a heterotrophic, anaerobic, and piezophilic lifestyle.