Abstract
The multilayered cell wall of the cyanobacterium Anacystis nidulans was studied by the freezeetching technique. A characteristic fracture face in the outer cell wall was demonstrated which is densely packed with particles of a diameter of 60–75 Å. This particle layer is comparable with layers which have been described in many cell walls of Gram-negative prokaryotes.
The outer membrane of the cell wall was solubilised by extraction with phenol/water or sodium dodecyl sulfate (SDS). In the SDS-extract 31 bands were separated by polyacrylamide gel electrophoresis, among them 3–5 major proteins with molecular weights of approximately 60, 40, and 10 kdaltons, respectively. Several polypeptides of the Anacystis cell wall were comparable in their mobility with polypeptides extracted from cell walls of different Gramnegative bacteria. The analysis of the SDS-unsoluble electron dense layer (sacculi) revealed the typical components of peptidoglycan diaminopimelic acid, muramic acid, glutamic acid, glucosamine and alamine in the molar ratio of 1.0:0.9:1.1:1.5:1.9. In addition, other amino acids (molar ratio from 0.05–0.36), mannosamine (molar ratio 0.54), and lipopolysaccharide components were detected in low concentration.
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Abbreviations
- SDS:
-
sodium dodecyl sulfate
- EDTA:
-
ethylene diamine tetraacetate
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Golecki, J.R. Studies on ultrastructure and composition of cell walls of the cyanobacterium Anacystis nidulans . Arch. Microbiol. 114, 35–41 (1977). https://doi.org/10.1007/BF00429627
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DOI: https://doi.org/10.1007/BF00429627