Novel teichulosonic acid from cell walls of some representatives of the genus Kribbellaстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Cell walls of each of five bacterial strains belonging to the genus Kribbella (family Nocardioidaceae, order Actinomycetales) contain a neutral polysaccharide (mannan) and teichulosonic acid of novel structure in different proportions. The novel teichulosonic acid found in strains VKM Ac-2500, VKM Ас-2568, VKM Ас-2572 and VKM Ас-2575 is a heteropolymer with irregular structure where fragments I (predominant) alternate with fragments II (minor). The teichulosonic acid from Kribbella sp. VKM Ac-2527 has generally similar structure as above with the exception of that the Pse residue is randomly glycosylated at O-4 with beta-L-Rhap (along with alpha-D-Galp3OMe or alpha-D-Galp2,3OMe). The strain VKM Ac-2572 contained additionally teichuronic acid with the disaccharide repeating unit consisted of aminomannuronic acid and 2,3-diacetamido-2,3-dideoxy-alpha-glucopyranose. The mannan, a polysaccharide common to all of the strains, is built of (1>6)-linked alpha-mannopyranose substituted with alpha-mannopyranose at O-2. The structures of all the glycopolymers were established by a combination of chemical and NMR spectroscopic methods.