N-unsubstituted glucosamine residues and other modifications in murein of the obligatory chemolithotroph Thiobacillus neapolitanus. |
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Authors: | J Baj I Grabowska Z Markiewicz |
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Affiliation: | Institute of Microbiology, University of Warsaw. |
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Abstract: | Purified murein from Thiobacillus neapolitanus was poorly digested by lysozyme. It's sensitivity to the enzyme greatly increased after N-acetylation. The murein was found to contain 30 to 35% glucosamine residues lacking N-acetyl groups. It also contained phosphomuramic acid. Further modifications included amidation of diaminopimelic acid in the peptide side chains and a low alanine content. None of these modifications were found in the murein of another sulphur bacterium, Thiobacillus versutus. |
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