TAILIEUCHUNG - Báo cáo Y học: A polymer with a backbone of 3-deoxy-D-glycero -D-galacto -non-2ulopyranosonic acid, a teichuronic acid, and a b-glucosylated ribitol teichoic acid in the cell wall of plant pathogenic Streptomyces sp. VKM Ac-2124

Structures of cell wall anionic polymers of the strainStrep-tomycessp. VKMAc-2124, a causative agent of potato scab, which is phylogenetically the closest to plant pathogenic speciesS. setoniiandS. caviscabies, were studied. The strain contains threeanionicglycopolymers, viz., a teichuronicacid with a disaccharide repeatingunitfi6)-a-D-Glcp-(1fi4)-b-D-ManpNAc3NAcA-(1fi,ab-glucosylated polymer of 3-deoxy-D-glycero-D-galacto-non-2-ulopyranosonic acid (Kdn), and ab-glucosylated 1,5-poly(ribitol phosphate). . | Eur. J. Biochem. 269 6020-6025 2002 FEBS 2002 doi A polymer with a backbone of 3-deoxy-D-glycero-D-galacto-non-2-ulopyranosonic acid a teichuronic acid and a b-glucosylated ribitol teichoic acid in the cell wall of plant pathogenic Streptomyces sp. VKM Ac-2124 Alexander S. Shashkov1 Larisa N. Kosmachevskaya2 Galina M. Streshinskaya2 Lyudmila I. Evtushenko3 Olga V. Bueva3 Viktor A. Denisenko4 Irina B. Naumova2 and Erko Stackebrandt5 . Zelinsky Institute of Organic Chemistry Russian Academy of Sciences Moscow Russia 2School of Biology . Lomonosov Moscow State University Moscow Russia 3Institute of Biochemistry and Physiology of Microorganisms Russian Academy of Sciences Pushchino Moscow Region Russia 4Belarussian Research Institute for Potato Growing Samokhvalovitchi Minsk Region Belarus 5DSMZ-Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH Braunschweig Germany Structures of cell wall anionic polymers of the strain Strep-tomyces sp. VKM Ac-2124 a causative agent of potato scab which is phylogenetically the closest to plant pathogenic species S. setonii and S. caviscabies were studied. The strain contains three anionic glycopolymers viz. a teichuronic acid with a disaccharide repeating unit fi6 -a-D-Glcp- 1fi4 -b-D-ManpNAc3NAcA- 1fi a b-glucosylated polymer of 3-deoxy-D-glycero-D-galacto-non-2-ulopyranosonic acid Kdn and a b-glucosylated 1 5-poly ribitol phosphate . The strain studied is the second representative of plant pathogenic streptomycetes inducingpotato scab disease the cell wall anionic polymers of which were shown to contain a Kdn-polymer. Presumably the presence of Kdn-containing structures in the surface regions of pathogens is essential for their efficient attachment to host plant cells. Keywords NMR spectroscopy teichuronic acid teichoic acid Kdn Streptomyces. Cell walls of the majority of Gram-positive bacteria belonging to the genus Streptomyces the order Actino-mycetales contain teichoic acids the .

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