由产生葡糖醛酸聚糖的苜蓿根瘤菌M5N1CS（NCIMB 40472）和产生琥珀酰聚糖的苜蓿根瘤菌M5N1分泌的环状（1→2）-β-D-葡聚糖。
Cyclic (1-->2)-beta-D-glucans excreted by the glucuronan-producing strain Rhizobium meliloti M5N1CS (NCIMB 40472) and by the succinoglycan-producing strain Rhizobium meliloti M5N1.
作者信息
Michaud P, Courtois J, Courtois B, Heyraud A, Colin-Morel P, Séguin J P, Barbotin J N
机构信息
Laboratoire de Biotechnologie Microbienne, Université de Picardie Jules Verne, Amiens, France.
出版信息
Int J Biol Macromol. 1995 Dec;17(6):369-72. doi: 10.1016/0141-8130(96)81848-4.
During fermentation, the mutant strain Rhizobium meliloti M5N1CS, which induces nodule formation on alfalfa roots, produces a partially acetylated (1-->4)-beta-D-glucuronan. In addition to this exopolysaccharide of high molecular weight, the mutant strain produces oligoglucoronates and cyclic (1-->2)-beta-D-glucans with degrees of polymerization from 17 to 30. Under the conditions applied, magnesium has no effect on cyclic glucan production by the mutant strain, but the succinoglycan production by the wild-type strain Rhizobium meliloti M5N1 increases.
在发酵过程中，能在苜蓿根上诱导根瘤形成的突变菌株苜蓿根瘤菌M5N1CS会产生部分乙酰化的(1→4)-β-D-葡糖醛酸聚糖。除了这种高分子量的胞外多糖外，该突变菌株还会产生寡聚葡糖醛酸酯和聚合度为17至30的环状(1→2)-β-D-葡聚糖。在所应用的条件下，镁对该突变菌株产生环状葡聚糖没有影响，但野生型菌株苜蓿根瘤菌M5N1的琥珀聚糖产量会增加。
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