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  • Thermophile  (2)
  • Archaebacteria  (1)
  • Calcium channel  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Annexin V membrane interaction: an electrostatic potential study (1992)
    Springer
    European biophysics journal 20 (1992), S. 337-344 
    Details
    ISSN: 1432-1017
    Keywords: Annexin V ; Electrostatic interactions ; Electroporation ; Calcium channel
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Physics
    Notes: Abstract The possible role of electrostatic interactions for membrane binding and pore formation of annexin V has been analysed on the basis of a simple dielectric model. It is suggested that the binding of phospholipids to annexin V is regulated, at least initially, by the protein's electrostatic potential. The calculations show that a strong local gradient of the electrostatic potential exists at the membrane-protein interface and a membrane pore may be generated by electroporation. The observed specificity and regulation of ion conduction is suggested to reside in the protein part of the pore. On the basis of the three-dimensional structures of the protein and its hypothetical membrane complex, and electrophysiological measurements, a mechanical model of the transmembrane voltage regulation of the annexin's ion conduction properties is proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00196592
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Thermotoga maritima sp. nov. represents a new genus of unique extremely thermophilic eubacteria growing up to 90°C (1986)
    Springer
    Archives of microbiology 144 (1986), S. 324-333 
    Details
    ISSN: 1432-072X
    Keywords: Evolution ; Eubacteria ; Thermophile ; Anaerobe ; Thermotoga maritima
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A novel type of bacterium has been isolated from various geothermally heated locales on the sea floor. The organisms are strictly anaerobic, rod-shaped, fermentative, extremely thermophilic and grow between 55 and 90°C with an optimum of around 80°C. Cells show a unique sheath-like structure and monotrichous flagellation. By 16S rRNA sequencing they clearly belong to the eubacteria, although no close relationship to any known group could be detected. The majority of their lipids appear to be unique in structure among the eubacteria. Isolate MSB8 is described as Thermotoga maritima, representing the new genus Thermotoga.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00409880
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Fervidobacterium islandicum sp. nov., a new extremely thermophilic eubacterium belonging to the “Thermotogales” (1990)
    Springer
    Archives of microbiology 154 (1990), S. 105-111 
    Details
    ISSN: 1432-072X
    Keywords: Eubacterium ; Thermophile ; Evolution ; Fervidobacterium ; Lipids ; Thermotoga
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract An extremely thermophilic anaerobic fermentative eubacterium growing at temperatures between 50 and 80°C (opt.: 65°C) was isolated from an Icelandic hot spring. The cells were Gram-negative motile rods, about 1.8 μm in length, and 0.6 μm in width occurring singly and in pairs. About 50% of the cells formed large spheroids at one end similar to Fervidobacterium nodosum. The new isolate H 21 differed from Fervidobacterium nodosum by a 6 mol % higher GC-content of its DNA (41 mol %), its ability to grow on cellulose, and insignificant DNA homology. The lipids of isolate H 21 were similar to that of members of “Thermotogales”. 16S rRNA sequencing of isolate H 21 and Fervidobacterium nodosum indicated (a) that isolate H 21 represents a new species of the genus Fervidobacterium which we name Fervidobacterium islandicum and (b) that the genus Fervidobacterium belongs to the “Thermotogales” branch.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00423318
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Enzymes of the reductive citric acid cycle in the autotrophic eubacterium Aquifex pyrophilus and in the archaebacterium Thermoproteus neutrophilus (1993)
    Springer
    Archives of microbiology 160 (1993), S. 306-311 
    Details
    ISSN: 1432-072X
    Keywords: Autotroph ; Archaebacteria ; Aquifex ; Hydrogenobacter ; Thermoproteus ; CO2 fixation ; Reductive citric acid cycle
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The autotrophic carbon fixation pathway was studied in the thermophilic hydrogen oxidizing eubacterium Aquifex pyrophilus and in the thermophilic sulfur reducing archaebacterium Thermoproteus neutrophilus. Neither organism contained ribulose-1,5-bisphosphate carboxylase activity suggesting that the Calvin cycle is not operating. Rather, all enzymes of the reductive citric acid cycle were found in A. pyrophilus. In T. neutrophilus ATP citrate lyase activity was detected which has not been achieved so far; this finding corroborates earlier work suggesting the presence of the reductive citric acid cycle in this archaebacterium. The reductive citric acid cycle for autotrophic CO2 fixation now has been documented in the eubacterial branches of the proteobacteria, in green sulfur bacteria, and in the thermophilic Knallgas bacteria as well as in the branch of the sulfur dependent archaebacteria.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00292082
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    Paper (German National Licenses)
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