Acidilobus: Difference between revisions
No edit summary |
No edit summary |
||
| Line 25: | Line 25: | ||
The cells of ''Acidilobus'' are regular or irregular cocci with diameter of 1-2 &micor;m. They are non-motile and have a cell envelope consisting of one layer of subunits. | The cells of ''Acidilobus'' are regular or irregular cocci with diameter of 1-2 &micor;m. They are non-motile and have a cell envelope consisting of one layer of subunits. | ||
It ferments starch and forms acetate as the main growth product (other growth substrates are yeast extract, beef extract and soya extract). Elemental sulfur stimulates growth on yeast, soya, and beef extracts and is reduced to H<sub>2</sub>S. The organism is unable to utilize acetate, arabinose, cellulose, formate, fructose, galactose, glucose, glycine, guar gum, lichenan, malate, maltose, methanol, pectin, pyruvate, propionate, xylan, xylose, and mixture of amino acids. | |||
==Ecology== | ==Ecology== | ||
Revision as of 20:57, 26 June 2006
|
NCBI: |
Classification
Higher order taxa
Archaea; Crenarchaeota; Thermoprotei; Desulfurococcales; Desulfurococcaceae
Species
Acidilobus aceticus
Description and significance
Acidilobus (acid lobe) is an obligately anaerobic, hyperthermophilic, acidophilic archaeon that grows in the temperatures between 60-92°C (optimum = 85°C) and in the pH range of 2.0-6.0 (optimum at 3.8).
Genome structure
There are currently no genome project held for this archaeon. The G+C content of its DNA, however, is found to be 53.8%.
Cell structure and metabolism
The cells of Acidilobus are regular or irregular cocci with diameter of 1-2 &micor;m. They are non-motile and have a cell envelope consisting of one layer of subunits. It ferments starch and forms acetate as the main growth product (other growth substrates are yeast extract, beef extract and soya extract). Elemental sulfur stimulates growth on yeast, soya, and beef extracts and is reduced to H2S. The organism is unable to utilize acetate, arabinose, cellulose, formate, fructose, galactose, glucose, glycine, guar gum, lichenan, malate, maltose, methanol, pectin, pyruvate, propionate, xylan, xylose, and mixture of amino acids.
Ecology
The strains of Acidilobus aceticus were isolated from the acidic hot springs of the Moutnovski volcano in Kamchatka, Russia. Similar to most other thermoacidophilic isolates, the habitat of the archaeon is terrestrial acidic hot springs.
