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J Bacteriol. 1973 February; 113(2): 592-598
Copyright © 1973 American Society for Microbiology. All Rights Reserved.

Occurrence of Glucosamine Residues with Free Amino Groups in Cell Wall Peptidoglycan from Bacilli as a Factor Responsible for Resistance to Lysozyme

Hideyuki Hayashi, Yoshio Araki and Eiji Ito

Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, Japan

ABSTRACT

Analysis by dinitrophenylation techniques revealed the occurrence of significant amounts of glucosamine residues with free amino groups in the peptidoglycan component of cell walls isolated from Bacillus cereus, Bacillus subtilis, and Bacillus megaterium. A close correlation was demonstrated between the content of N-unacetylated glucosamine residues in the peptidoglycan component and the resistance of the cell walls to lysozyme. These lysozyme-resistant cell walls and peptidoglycan were converted into a lysozyme-sensitive form by means of N-acetylation with acetic anhydride. Thus, the occurrence of the N-unacetylated glucosamine residues in the peptidoglycan component accounts for the resistance of these cell walls to lysozyme. The N-unacetylated glucosamine residues were not found in a significant amount in the cell walls of Micrococcus lysodeikticus, Staphylococcus aureus, Streptococcus faecalis, Lactobacillus casei, or Lactobacillus arabinosus.


J Bacteriol. 1973 February; 113(2): 592-598
Copyright © 1973 American Society for Microbiology. All Rights Reserved.




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