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Title: Chemical modification of β-glucosidase/ β-fucosidase from dalbergia cochinchinensis pierre by conduritol b epoxide
Authors: Rudee Surarit
Hirokazu Matsui
Seiya Chiba
Jisnuson Svasti
Chantragan Srisomsap
Mahidol University
Hokkaido University
Chulabhorn Research Institute
Keywords: Biochemistry, Genetics and Molecular Biology;Chemistry;Immunology and Microbiology
Issue Date: 1-Jan-1996
Citation: Bioscience, Biotechnology and Biochemistry. Vol.60, No.8 (1996), 1265-1268
Abstract: Studies have been done on the inhibition and inactivation of the β-glucosidase and β-fucosidase enzyme from Thai Rosewood (Dalbergia cochinchinesis Pierre). The enzyme was inhibited by Tris with similar Kiof 11.7 mm and 14.3 mm for the hydrolysis of p/nitrophenyl β-d-glucoside (PNPG) and p/nitrophenyl β-d-fucoside (PNPF), respectively. Conduritol B epoxide inhibited both β-glucosidase and β/fucosidase activities to similar extents, with a pseudo-first-order rate constant (Kobs) of inactivation of 5.56 × 10−3s−1, and binding stoichiometry of 0.9 mol per subunit. Partially inactivated enzyme showed similar kinetics with PNPG and PNPF as substrates. Moreover, Tris at 300 mm protected both β-glucosidase and β-fucosidase activities from inactivation by 6mm CBE. The data support the idea that the Dalbergia cochinchinensis Pierre enzyme has a common active site for the hydrolysis of PNPG and PNPF. © 1996, Taylor & Francis Group, LLC. All rights reserved.
ISSN: 13476947
Appears in Collections:Scopus 1991-2000

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