作者:Manabu SUGIMOTO、Satoshi FURUI、Kenji SASAKI、Yukio SUZUKI
DOI:10.1271/bbb.67.1160
日期:2003.1
Transglucosylation activities of spinach α-glucosidase I and IV, which have different substrate specificity for hydrolyzing activity, were investigated. In a maltose mixture, α-glucosidase I, which has high activity toward not only maltooligosaccharides but also soluble starch and can hydrolyze isomaltose, produced maltotriose, isomaltose, and panose, and α-glucosidase IV, which has high activity toward maltooligosaccharides but faint activity toward soluble starch and isomaltose, produced maltotriose, kojibiose, and 2,4-di-α-D-glucosyl-glucose. Transglucosylation to sucrose by α-glucosidase I and IV resulted in the production of theanderose and erlose, respectively, showing that spinach α-glucosidase I and IV are useful to synthesize the α-1,6-glucosylated and α-1,2- and 1,4-glucosylated products, respectively.
研究了菠菜 α-葡萄糖苷酶 I 和 IV 的转葡萄糖基活性,这两种酶对水解活性具有不同的底物特异性。在麦芽糖混合物中,α-葡萄糖苷酶I不仅对麦芽低聚糖而且对可溶性淀粉都具有高活性,并且可以水解异麦芽糖,产生麦芽三糖、异麦芽糖和潘糖,以及α-葡萄糖苷酶IV对麦芽低聚糖具有高活性但活性微弱转化为可溶性淀粉和异麦芽糖,产生麦芽三糖、曲二糖和2,4-二-α-D-葡萄糖基葡萄糖。 α-葡萄糖苷酶 I 和 IV 对蔗糖的转糖基化分别导致产生了 theanderose 和 erlose,这表明菠菜 α-葡萄糖苷酶 I 和 IV 可用于合成 α-1,6-葡萄糖基化和 α-1,2- 和分别为1,4-葡萄糖基化产物。