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Purification and characterization of SDG-β-d-glucosidase hydrolyzing secoisolariciresinol diglucoside to secoisolariciresinol from Aspergillus oryzae

Paper ID Volume ID Publish Year Pages File Format Full-Text
35160 45079 2009 5 PDF Available
Title
Purification and characterization of SDG-β-d-glucosidase hydrolyzing secoisolariciresinol diglucoside to secoisolariciresinol from Aspergillus oryzae
Abstract

The SDG-β-d-glucosidase that hydrolyzes the glucopyranoside bond of secoisolariciresinol diglucoside (SDG) to release secoisolariciresinol (SECO) was isolated from Aspergillus oryzae 39 strain and the enzyme was purified and characterized. The enzyme was purified to one spot in SDS polyacrylamide gel electrophoresis, and its molecular weight was about 64.9 kDa. The optimum temperature of the SDG-β-d-glucosidase was 40 °C, and the optimum pH was 5.0. The SDG-β-d-glucosidase was stable at less than 65 °C, and pH 4.0–6.0. Ca2+, K+, Mg2+ and Na+ ions have no significant effect on enzyme activity, Zn2+ and Cu2+ ions have weakly effect on enzyme activity, but Fe3+ ion inhibits enzyme activity strongly. The Km value of SDG-β-d-glucosidase was 0.14 mM for SDG.

Keywords
Purification; Characterization; SDG-β-d-glucosidase; Aspergillus oryzae
First Page Preview
Purification and characterization of SDG-β-d-glucosidase hydrolyzing secoisolariciresinol diglucoside to secoisolariciresinol from Aspergillus oryzae
Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 44, Issue 6, June 2009, Pages 607–611
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering