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  • 1985-1989  (3)
  • Planctomyces  (2)
  • Life and Medical Sciences
  • 1
    Electronic Resource
    Electronic Resource
    Chemical composition of the peptidoglycan-free cell envelopes of budding bacteria of the Pirella/Planctomyces group (1986)
    Springer
    Archives of microbiology 145 (1986), S. 361-366 
    Details
    ISSN: 1432-072X
    Keywords: Pirella ; Planctomyces ; Cell envelope composition ; Proline ; Cystine ; Phylogeny of eubacteria
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Cell envelopes were prepared from freeze-dried cells of 8 strains of budding bacteria belonging to the Pirella/Planctomyces group. Treatment with 10% sodium dodecylsulfate (SDS) (30 min, 100°C) allowed the isolation of stable cell sacculi which still maintained the original cell shape. The chemical analysis showed, as the main component, protein which was unusually rich in proline and cystine. Except for Planctomyces maris IFAM 1317 (where this protein comprised 62.6% of the total envelope dry weight) the corresponding values for the other strains varied from 75 to 82%. Amino sugars and neutral sugars were present only in small amounts and uronic acids were not found. The ash content varied from 5 to 10% of the dry weight, except for IFAM 1317 which had 19% ash. The high content of cystine indicated a high degree of crosslinking of the cell envelopes through disulfide bonds. Our data show that bacteria of the Pirella/Planctomyces group possess a similar cell wall composition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00470872
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The budding bacteria, Pirellula and Planctomyces, with atypical 16S rRNA and absence of peptidoglycan, show eubacterial phospholipids and uniquely high proportions of long chain beta-hydroxy fatty acids in the lipopolysaccharide lipid A (1988)
    Springer
    Archives of microbiology 149 (1988), S. 255-260 
    Details
    ISSN: 1432-072X
    Keywords: Fatty acid composition ; Pirellula ; Planctomyces ; Non-prosthecate, budding bacteria ; Phylogeny of eubacteria ; Lipids ; Fatty acids ; Lipopolysaccharides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Fatty acids of twelve strains of budding bacteria (Planctomyces and Pirellula spp.), which have atypical 16S rRNA and do not contain peptidoglycan cell walls, were shown to contain typical diacyl polar lipids with no indication of isoprenoid ether lipids suggestive of a relationship with the archaebacteria. The major ester-linked fatty acids of the phospholipids were palmitic, palmitoleic and oleic acids, which are more typical of microeukaryotes than of eubacteria. Lipopolysaccharide lipid A (LPS) was detected; it contained major proportions of long chain normal 3-OH fatty acids (3-OH eicosanoic at 23% and 17% of the total in two strains of Planctomyces, and 3-OH octadecanoic at 18%, and 3-OH palmitic at 11% of the total in one strain of Pirellula). Major portions of long chain 3-OH fatty acids in the LPS are extremely unusual and provide another atypical property of these organisms. Each strain investigated showed a specific total fatty acid composition, reflecting the diversity in 16S rRNA nucleotide catalogues.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00422014
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Foreward (1986)
    New York, NY : Wiley-Blackwell
    Journal of Electron Microscopy Technique 3 (1986), S. 1-2 
    Details
    ISSN: 0741-0581
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jemt.1060030102
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    Paper (German National Licenses)
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