In:
Journal of Bacteriology, American Society for Microbiology, Vol. 109, No. 2 ( 1972-02), p. 895-905
Kurzfassung:
The peptidoglycan layer of a marine pseudomonad was observed by electron microscopy in thin sections of plasmolyzed intact cells and mureinoplasts but not in untreated intact cells. Only fragments of this layer could be isolated by sodium lauryl sulfate (SLS) treatment of mureinoplast envelopes. Sacculus-like peptidoglycan structures were obtained from growing cells by immediate heat inactivation of cellular autolytic enzymes and subsequent SLS, trypsin, and nuclease treatments. Recently, similar peptidoglycan sacculus-like structures have been obtained by adding SLS to the growing culture and treating the isolated particulate material with nucleases. Thin-sectioned and negatively stained preparations of whole cell peptidoglycan showed compressed profiles of cell-shaped sacculi. Peptidoglycan prepared by SLS treatment of mureinoplast envelopes had a similar composition to that prepared from whole cells. The major amino sugars and amino acids in the peptidoglycan component were glucosamine, muramic acid, alanine, glutamic acid and diaminopimelic acid in the molar ratios 1.18:1.24:1.77:1.00:0.79. Forty-five per cent of the ε-amino groups of diaminopimelic acid were cross-linked. The peptidoglycan was estimated to account for about 1% of the cell dry weight.
Materialart:
Online-Ressource
ISSN:
0021-9193
,
1098-5530
DOI:
10.1128/jb.109.2.895-905.1972
Sprache:
Englisch
Verlag:
American Society for Microbiology
Publikationsdatum:
1972
ZDB Id:
1481988-0
SSG:
12
