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发明公开
CN103865967A 支链α-葡聚糖及生成其的α-葡糖基转移酶和它们的制造方法以及用途 有权

支链α-葡聚糖及生成其的α-葡糖基转移酶和它们的制造方法以及用途
摘要：
本发明提供支链α-葡聚糖及生成其的α-葡糖基转移酶和它们的制造方法以及用途。所述支链α-葡聚糖以葡萄糖为构成糖，其特征在于，在甲基化分析中，具有下述特征：(1)2,3,6-三甲基-1,4,5-三乙酰基葡萄糖醇和2,3,4-三甲基-1,5,6-三乙酰基葡萄糖醇之比在1:0.6～1:4的范围；(2)2,3,6-三甲基-1,4,5-三乙酰基葡萄糖醇和2,3,4-三甲基-1,5,6-三乙酰基葡萄糖醇的总计占部分甲基化葡萄糖醇乙酸酯的60%以上；(3)2,4,6-三甲基-1,3,5-三乙酰基葡萄糖醇为部分甲基化葡萄糖醇乙酸酯的0.5%以上且小于10%；及(4)2,4-二甲基-1,3,5,6-四乙酰基葡萄糖醇为部分甲基化葡萄糖醇乙酸酯的0.5%以上。
摘要（英）：

The present invention has objects to provide a glucan useful as water-soluble dietary fiber, its preparation and uses. The present invention solves the above objects by providing a branched [alpha]-glucan, which is constructed by glucose molecules and characterized by methylation analysis as follows: (1) Ratio of 2,3,6-trimethyl-1,4,5-triacetyl-glucitol to 2,3,4-trimethyl-1,5,6-triacetyl-glucitol is in the range of 1:0.6 to 1:4; (2) Total content of 2,3,6-trimethyl-1,4,5-triacetyl-glucitol and 2,3,4-trimethyl-1,5,6-triacetyl-glucitolis 60% or higher in the partially methylated glucitol acetates; (3) Content of 2,4,6-trimethyl-1,3,5-triacetyl-glucitol is 0.5% or higher but less than 10% in the partially methylated glucitol acetates; and (4) Content of 2,4-dimethyl-1,3,5,6-tetraacetyl-glucitol is 0.5% or higher in the partially methylated glucitol acetates; a novel [alpha]-glucosyltransferase which forms the branched [alpha]-glucan, processes for producing them, and their uses.

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