A novel type of meso-diaminopimelic acid-based peptidoglycan and novel poly (erythritol phosphate) teichoic acids in cell walls of two coryneform isolates from the surface flora of French cooked cheeses |
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Authors: | Karin Schubert Dieter Reiml Jean-Pierre Accolas Franz Fiedler |
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Affiliation: | (1) Institut für Genetik und Mikrobiologie der Universität München, Maria-Ward-Strasse 1 a, D-80638 München, Germany;(2) Station de Recherches Laitières, Institut National de la Recherche Agronomique, F-78352 Jouy-en-Joasas Cedex, France |
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Abstract: | The primary structure of the peptidoglycan and the teichoic acids of two coryneform isolates from the surface flora of French cooked cheeses, CNRZ 925 and CNRZ 926, have been determined. In the peptidoglycan, meso-diaminopimelic acid was localized in position three of the peptide subunit. It contained an d-glutamyl-d-aspartyl interpeptide bridge, connecting meso-diaminopimelic acid and d-alanine residues of adjacent peptide subunits. The -carboxyl group of d-glutamic acid in position two of peptide subunits was substituted with glycine amide. The teichoic acid pattern and composition differed between the strains: both contained an erythritol teichoic acid and strain CNRZ 925 also contained an N-acetylglucosaminylphosphate polymer. The erythritol teichoic acids differed in terms of the quality and quantity of substituents, but they both had N,N -diacetyl-2,3-diamino-2,3-dideoxyglucuronic acid in common.Abbreviations DNP dinitrophenyl - Ery erythritol - Gal galactose - GlcN glucosamine - GlcNAc N-acetylglucosamine - GlcUANAc2 N,N -diacetyl-2,3-diamino-2,3-dideoxyglucuronic acid - Hex UANAc2 N,N -diacetyl-2,3-diamino-2,3-dideoxyhexuronic - acid m-Dpm, meso-diaminopimelic acid - Mur muramic acid - MurNAc N-acetylmuramic acid |
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Keywords: | Cheese flora Erythritol teichoic acid N,N /content/p50428021115j601/xxlarge8242.gif" alt=" prime" align=" BASELINE" BORDER=" 0" >-Diacetyl-2,3-diamino-2,3-dideoxyglucuronic acid m-Dpm based peptidoglycan containing a font-variant:small-caps" >d-Glu- font-variant:small-caps" >d-Asp interpeptide bridge |
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