巴西固氮螺菌Jm125A2脂多糖中多糖的结构
Structure of the polysaccharides from the lipopolysaccharide of Azospirillum brasilense Jm125A2.
作者信息
Sigida Elena N, Fedonenko Yuliya P, Shashkov Alexander S, Zdorovenko Evelina L, Konnova Svetlana A, Ignatov Vladimir V, Knirel Yuriy A
机构信息
Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, Prospekt Entuziastov 13, 410049 Saratov, Russia.
Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, Prospekt Entuziastov 13, 410049 Saratov, Russia.
出版信息
Carbohydr Res. 2015 Oct 30;416:37-40. doi: 10.1016/j.carres.2015.08.011. Epub 2015 Aug 28.
Two polysaccharides were obtained by mild acid degradation of the lipopolysaccharide of associative nitrogen-fixing bacteria Azospirillum brasilense Jm125A2 isolated from the rhizosphere of a pearl millet. The following structures of the polysaccharides were established by sugar and methylation analyses, Smith degradation, and (1)H and (13)C NMR spectroscopy: [Formula: see text] Structure 1 has been reported earlier for a polysaccharide from A. brasilense S17 (Fedonenko YP, Konnova ON, Zdorovenko EL, Konnova SA, Zatonsky GV, Shaskov AS, Ignatov VV, Knirel YA. Carbohydr Res 2008;343:810-6), whereas to our knowledge structure 2 has not been hitherto found in bacterial polysaccharides.
通过对从珍珠粟根际分离出的联合固氮菌巴西固氮螺菌Jm125A2的脂多糖进行温和酸降解，获得了两种多糖。通过糖和甲基化分析、史密斯降解以及¹H和¹³C NMR光谱确定了这些多糖的以下结构：[分子式：见正文]结构1先前已报道过来自巴西固氮螺菌S17的一种多糖（Fedonenko YP，Konnova ON，Zdorovenko EL，Konnova SA，Zatonsky GV，Shaskov AS，Ignatov VV，Knirel YA。Carbohydr Res 2008；343：810 - 6），而据我们所知，结构2迄今尚未在细菌多糖中发现。
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