Production of Exopolysaccharides
Production of Exopolysaccharides
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DOI：
10.1007/978-94-011-5060-6_6
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
A. Becker;A. Pühler
中科院分区：
文献类型：
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作者：
A. Becker;A. Pühler
包括根瘤菌科在内的多种细菌都能够分泌多糖。在细胞表面形成粘附层的糖聚合物被称为荚膜多糖（CPS），而术语胞外多糖（EPS）用于具有很少或没有细胞缔合的多糖。由于单糖序列、缩合键和非碳水化合物修饰的变化，此类大分子可以提供无限多种结构。不同的流变特性取决于 EPS 的结构和分子量。 EPS 的这些特性和位置形成了细胞表面的外层，有助于保护细胞免受环境影响、表面附着、营养物质聚集和抗原性（Costerton 等人，1987 年，Sutherland 1988 年，Whitfield 1988 年，Beveridge 和 Graham 1991 年）。 EPS 衍生的寡糖的结构多样性使它们能够在细胞间通讯中充当信息分子。最后，许多根瘤菌科的共生细菌在与宿主植物相互作用时使用寡糖作为信号分子。
A broad variety of bacteria including the Rhizobiaceae are able to secrete polysaccharides. Sugar polymers that form an adherent cohesive layer on the cell surface are designated capsular polysacharides (CPS), whereas the term exopolysaccharide (EPS) is used for polysaccharides with little or no cell association. Due to the variation of monosaccharide sequences, condensation linkages and non-carbohydrate decorations, an infinite array of structures can be provided by this class of macromolecules. Different rheological properties depend on the structure and the molecular weight of EPS. These properties and the location of EPS, forming the outer layer of the cell surface, contribute to the cell protection against environmental influences, attachment to surfaces, nutrient gathering and to antigenicity (Costerton et al., 1987, Sutherland 1988, Whitfield 1988, Beveridge and Graham 1991). The structural diversity of oligosaccharides derived from EPS enables them to function additionally as informational molecules in cell-cell-communications. Finally, many symbiotic bacteria of the Rhizobiaceae use oligosaccharides as signal molecules in the interaction with their host plant.