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苜蓿根瘤菌M5N1突变菌株产生的胞外葡糖醛酸聚糖的结构表征及流变学性质

Structural characterization and rheological properties of an extracellular glucuronan produced by a Rhizobium meliloti M5N1 mutant strain.

作者信息

Heyraud A, Courtois J, Dantas L, Colin-Morel P, Courtois B

机构信息

Centre de Recherches sur les Macromolécules Végétales (CNRS), Grenoble, France.

出版信息

Carbohydr Res. 1993 Feb 24;240:71-8. doi: 10.1016/0008-6215(93)84172-3.

DOI:10.1016/0008-6215(93)84172-3
PMID:8458016
Abstract

The mutant strain M5N1 C.S. (NCIMB 40472) of Rhizobium meliloti M5N1 is able to produce during fermentation a partially acetylated extracellular (1-->4)-beta-D-glucuronan. At low concentration (1 g.l-1), in the presence of monovalent cations, this new glucuronate behaves as a thickening agent, whereas at higher concentration a thermoreversible gel is obtained. With such divalent cations as Ca2+, a thermally stable gel can be formed.

摘要

苜蓿根瘤菌M5N1的突变菌株M5N1 C.S.（NCIMB 40472）在发酵过程中能够产生一种部分乙酰化的细胞外（1→4）-β-D-葡糖醛酸聚糖。在低浓度（1 g·l-1）下，在单价阳离子存在的情况下，这种新的葡糖醛酸盐表现为增稠剂，而在较高浓度下可获得热可逆凝胶。使用Ca2+等二价阳离子，可以形成热稳定凝胶。

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