Action Mode of a Debranching Enzyme of Germinating Rice Endosperm on Several Oligosaccharides and Polysaccharides
スポンサーリンク
概要
- 論文の詳細を見る
A debranching enzyme purified from germinating rice endosperm hydrolyzed oligosaccharides having maltosyl or maltotriosyl branches (B4-B6) moderately. Hydrolysis of maltosylmaltose by a "pullulanase" of higher plant origin has been scarcely reported, while our enzyme debranched maltosylmaltose like microbial pullulanase. Additionally, the enzyme slowly hydrolyzed isopanose to glucose and maltose. Gel-filtration analyses of hydrolysis products of polysaccharides with the enzyme suggested that while it hydrolyzed α-1, 6-linkages of pullulan at random, it hydrolyzed amylopectin and glycogen at the outer α-1, 6-linkages preferentially In the hydrolysis products of glycogen with the enzyme for a longer incubation time, large molecular-weight glucans still remained. This indicated that the enzyme was able to hydrolyze a few of the α-1, 6-linkages of glycogen.
著者
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Fuwa Hidetsugu
Department Of Food And Nutrition Osaka City University
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IWAKI Keiko
Department of Food and Nutrition, Faculty of Science of Living, Osaka City University
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