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  • Thiobacillus neapolitanus  (2)
  • Chemolithotroph  (1)
  • *Software
  • Springer  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Characterization of a homogenous preparation of carboxysomes from Thiobacillus neapolitanus (1983)
    Springer
    Archives of microbiology 134 (1983), S. 52-59 
    Details
    ISSN: 1432-072X
    Keywords: Carboxysomes ; Ribulose-1,5-bisphosphate carboxylase-oxygenase ; Thiobacillus neapolitanus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A homogenous preparation of carboxysomes was isolated from Thiobacillus neapolitanus by means of density gradient centrifugation and preparative electrophoresis through agarose. Analysis of the carboxysomes by denaturing sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) revealed the presence of 12–15 polypeptides. Approximately 62% of the total protein was found to consist of the large and small subunits of ribulose-1,5-bisphosphate carboxylase-oxygenase (RubisCO). Two polypeptides were found to be components of the carboxysome shell. Ribose-5-phosphate isomerase, ribulose-5-phosphate kinase, and fructose-1,6-bisphosphatase could not be detected in the carboxysome. Purified carboxysomal and cytoplasmic RubisCO were shown to be similar if not identical by several criteria including specific activity, carboxylase/oxygenase activity, and electrophoretic mobility.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00429407
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  • 2
    Electronic Resource
    Electronic Resource
    Relations between d-ribulose-1,5-bisphosphate carboxylase, carboxysomes and CO2 fixing capacity in the obligate chemolithotroph Thiobacillus neapolitanus grown under different limitations in the chemostat (1980)
    Springer
    Archives of microbiology 124 (1980), S. 185-189 
    Details
    ISSN: 1432-072X
    Keywords: Carboxysomes ; d-Ribulose-1,5-bisphosphate carboxylase ; CO2 fixing capacity ; Thiobacillus neapolitanus ; Chemolithotroph ; Autotroph
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract An adaptation of the d-ribulose-1,5-bisphosphate carboxylase (RuBPCase) activity to changing CO2 concentrations in the growth medium in the chemostat was observed in the obligate chemolithotroph Thiobacillus neapolitanus. RuBPCase activity has been separated in a soluble and particulate fraction. The activity of the particulate fraction appeared to be associated with the carboxysomes. The total activity of RuBPCase of CO2 limited cultures was about 5-fold higher than the activity of thiosulphate limited cultures grown in the presence of 5% CO2 whilst the particulate activity and the soluble activity were about 8- and 1.5-fold higher, respectively. The fluctuation of the total and particulate RuBPCase activity correlated with the changes in volume density of carboxysomes in the cell. An inverse correlation between maximal CO2 fixing capacity by whole cells and the volume density of carboxysomes was observed. The change in ratio of soluble RuBPCase activity to particulate RuBPCase activity paralleled the change in maximal CO2 fixation by whole cells during the different growth conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00427725
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