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Characteristics of ${\beta}$-Glucosidase Secreted by Trichoderma reesei KCTC 6952  

Park, Sung-Hee (Department of Food Science and Technology, Chung-Ang University)
Oh, Min-Jung (Department of Food Science and Technology, Chung-Ang University)
Lee, Jeong-Rai (Rexgene Biotech Co. Ltd.)
Kwon, Suk-Hyung (Rexgene Biotech Co. Ltd., College of Pharmacy, Chung-Ang University)
Choi, Young-Wook (College of Pharmacy, Chung-Ang University)
Lee, Min-Won (College of Pharmacy, Chung-Ang University)
Kim, Keun-Sung (Department of Food Science and Technology, Chung-Ang University)
Publication Information
Korean Journal of Food Science and Technology / v.37, no.3, 2005 , pp. 504-507 More about this Journal
Abstract
Trichoderma reesei KCTC 6952 possesses cellulase system consisting of three enzymatic components necessary to synergistically hydrolyze crystalline cellulose, among which ${\beta}$-glucosidase effectively releases glucose from glycoside derivatives. ${\beta}$-Glucosidase of T. reesei KCTC 6952 grown in modified Mandels' medium showed maximum activity(1.33 unit/mL) 4 days after initiation of growth. Optimal reaction conditions of the enzyme were 50 mM sodium acetate (pH 5) at $70^{\circ}C$ for 10 min. Enzymatic activities stabilized below $50^{\circ}C$ at pH range of 4-5. Results show ${\beta}$-glucosidase exerted its catalytic activities at relatively high temperatures and broad pH range.
Keywords
Trichoderma reesei; ${\beta}$-glucosidase; activity; stability; spent culture medium;
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