The structures of three cell wall glycopolymers of the phytopathogen Rathayibacter tritici VKM Ac-1603 T (family Microbacteriaceae, order Micrococcales, class Actinobacteria) were established by chemical methods and NMR spectroscopy. Polymer 1 is a branched rhamnomannan with the repeating unit →3)-α-[β-D-Xyl p -(1→2)]-D-Man p -(1→2)-α-D-Rha p -(1→3)-α-D-Man p -(1→2)-α-D-Rha p -(1→; polymer 2 is a linear rhamnomannan with the repeating unit →2)-α-D-Man p -(1→2)-α-D-Rha p -(1→3)-α-D-Man p -(1→2)-α-D-Rha p -(1→; polymer 3 is a branched teichuronic acid containing monosaccharide residues GlcA, Gal, Man, and Glc at a 1:1:1:5 ratio (see the text for the structures). It has been demonstrated that representatives of four Rathayibacter species studied to date ( R. tritici VKM Ac-1603 T , R. iranicus VKM Ac-1602 T , R. toxicus VKM Ac-1600 and “ Rathayibacter tanaceti” VKM Ac-2596) contain differing patterns of phosphate-free glycopolymers. At the same time, the above Rathayibacter strains have a common property — the presence of rhamnomannans with D-rhamnose. These rhamnomannans may be linear or branched and differing in the positions of glycosidic bonds and side substituents. The presence in the cell wall of rhamnomannans with D-rhamnose may serve as useful chemotaxonomic marker of the genus Rathayibacter .

中文翻译：

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来自 Rathayibacter tritici VKM Ac-1603T 细胞壁的鼠李糖甘露聚糖和 Teichuronic Acid

通过化学方法和核磁共振光谱法建立了植物病原体 Rathayibacter tritici VKM Ac-1603 T（微杆菌科，微球菌目，放线菌类）的三种细胞壁糖聚合物的结构。聚合物 1 是支链鼠李甘露聚糖，重复单元为 →3)-α-[β-D-Xyl p -(1→2)]-D-Man p -(1→2)-α-D-Rha p -( 1→3)-α-D-Man p -(1→2)-α-D-Rha p -(1→；聚合物 2 是线性鼠李甘露聚糖，重复单元为 →2)-α-D-Man p - (1→2)-α-D-Rha p -(1→3)-α-D-Man p -(1→2)-α-D-Rha p -(1→; 聚合物 3 是支链丁草酸含有单糖残基 GlcA、Gal、Man 和 Glc，比例为 1:1:1:5（结构见正文）。已经证明迄今为止研究的四种 Rathayibacter 物种的代表（ R. tritici VKM Ac- 1603 T , R. iranicus VKM Ac-1602 T , R. toxicus VKM Ac-1600 和“Rathayibacter tanaceti”VKM Ac-2596）包含不同模式的无磷酸盐糖聚合物。同时，上述 Rathayibacter 菌株有一个共同的特性——鼠李糖甘露聚糖和 D-鼠李糖的存在。这些鼠李糖甘露聚糖可以是直链或支链的，并且糖苷键和侧取代基的位置不同。鼠李糖甘露聚糖与 D-鼠李糖在细胞壁中的存在可作为 Rathayibacter 属有用的化学分类标记。