Pyrococcus abyssi GE5

Names Pyrococcus abyssi GE5
Accession numbers NC_000868, NC_001773
Background Pyrococcus has similar characteristics of other archaea such as Archaeoglobus, thermoautotrophican, and Methanococcus in its that they are all thermophilic and anaerobic. Pyrococcus differs, however, because it's optimal growth temperature is nearly 100oC and dwells at a greater sea depth than the other archaeons. Studying Pyrococcus helps give insight to possible mechanisms used to endure extreme environmental conditions like high temperatures and high pressure.The cells of Pyrococcus are about 0.8- 2um and are slightly irregular cocci in shape. They show a polar grouping of flagella and are enveloped by an S-layer enclosing a periplasmic space around the cytoplasmic membrane. Pyrococcus species are anaerobic but vary slightly concerning their metabolism. Peptide fermentation is the principle metabolic pathway however, growth has been observed for P. furiosus and P. abyssi on starch, maltose, and pyruvate but not for P. horikoshii. While the presence of elemental sulfur is not needed for growth, growth is enhanced with the addition of So.Pyrococcus species inhabit environments with extremely high temperatures such as undersea hot vents. Optimal growth conditions include a pH level of about 7, a salt concentration around 2.5%, and a temperature around 98oC. Growing in temperatures this high, it is easy to see why they are anaerobic since at these boiling temperatures hardly any oxygen will be available. In the example of undersea hot vents, where P. abyssi has been found, there is no sunlight and the pressure is around 200 atm in addition to the extremely high temperature. (From (MicrobeWiki: Pyrococcus)
Strain GE5
Complete Yes
Sequencing centre (10-SEP-2004) National Center for Biotechnology Information, NIH, Bethesda, MD 20894, USA
(19-JUN-2001) National Center for Biotechnology Information, NIH, Bethesda, MD 20894, USA
Sequencing quality Level 6: Finished
Sequencing depth NA
Sequencing method NA
Isolation site Active chimney in the North Fiji Basin of the Pacific Ocean at a depth of 3500m
Isolation country Japan
Number of replicons 2
Gram staining properties NA
Shape Cocci
Mobility No
Flagellar presence Yes
Number of membranes 1
Oxygen requirements Anaerobic
Optimal temperature 103.0
Temperature range Hyperthermophilic
Habitat Aquatic
Biotic relationship Free living
Host name NA
Cell arrangement NA
Sporulation Nonsporulating
Metabolism Sulfur respiration
Energy source NA
Diseases NA
Pathogenicity No