Picrophilus torridus is a species of Archaea described in 1996. Picrophilus torridus was found in soil near a hot spring in Hokkaido, Japan. The pH of the soil was less than 0.5. P. torridus also has one of the smallest genomes found among organisms that are free-living and are non-parasitic and a high coding density, meaning that the majority of its genes are coding regions and provide instructions for building proteins. The current research suggests the two hostile conditions (high temperatures and low pH) favored by P. torridus have exerted selective pressure towards having a small and compact genome, which is less likely to be damaged by the harsh environment.
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| - Picrophilus torridus (fr)
- Picrophilus torridus (en)
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| - Picrophilus torridus is a species of Archaea described in 1996. Picrophilus torridus was found in soil near a hot spring in Hokkaido, Japan. The pH of the soil was less than 0.5. P. torridus also has one of the smallest genomes found among organisms that are free-living and are non-parasitic and a high coding density, meaning that the majority of its genes are coding regions and provide instructions for building proteins. The current research suggests the two hostile conditions (high temperatures and low pH) favored by P. torridus have exerted selective pressure towards having a small and compact genome, which is less likely to be damaged by the harsh environment. (en)
- Picrophilus torridus est une espèce d'archées thermophiles et acidophiles de la famille des Picrophilaceae. Elle est capable de se développer à pH proche de 0 et à une température atteignant 65 °C. Le cytoplasme est également acide, avec un pH d'environ 4,6, ce qui est inhabituel car la plupart des autres acidophiles ont un pH intracellulaire plus ou moins neutre. La membrane plasmique est constituée d'étherlipides polaires qui présentent une faible perméabilité aux protons à pH faible ; cette membrane est recouverte d'une couche S. À pH neutre, les lipides de cette membrane ne peuvent plus s'assembler en liposomes, ce qui détruit la cellule. (fr)
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| - Picrophilus torridus (en)
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| - Schleper et al. 1996 (en)
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| - Picrophilus torridus is a species of Archaea described in 1996. Picrophilus torridus was found in soil near a hot spring in Hokkaido, Japan. The pH of the soil was less than 0.5. P. torridus also has one of the smallest genomes found among organisms that are free-living and are non-parasitic and a high coding density, meaning that the majority of its genes are coding regions and provide instructions for building proteins. The current research suggests the two hostile conditions (high temperatures and low pH) favored by P. torridus have exerted selective pressure towards having a small and compact genome, which is less likely to be damaged by the harsh environment. (en)
- Picrophilus torridus est une espèce d'archées thermophiles et acidophiles de la famille des Picrophilaceae. Elle est capable de se développer à pH proche de 0 et à une température atteignant 65 °C. Le cytoplasme est également acide, avec un pH d'environ 4,6, ce qui est inhabituel car la plupart des autres acidophiles ont un pH intracellulaire plus ou moins neutre. La membrane plasmique est constituée d'étherlipides polaires qui présentent une faible perméabilité aux protons à pH faible ; cette membrane est recouverte d'une couche S. À pH neutre, les lipides de cette membrane ne peuvent plus s'assembler en liposomes, ce qui détruit la cellule. (fr)
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