Watanabe T, Sato T, Yoshioka S, Koshijima T, Kuwahara M. Purification and properties of Aspergillus niger beta-glucosidase.
EUROPEAN JOURNAL OF BIOCHEMISTRY 1992;
209:651-9. [PMID:
1425671 DOI:
10.1111/j.1432-1033.1992.tb17332.x]
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Abstract
Beta-glucosidase was purified from a crude cellulase preparation from Aspergillus niger by affinity chromatography on a methacrylamide-N-methylene-bis-methacrylamide copolymer bearing cellobiamine. The purified enzyme was a dimer with an isoelectric point of 4.0. The molecular mass of the enzyme was estimated to be 240 kDa by gel-permeation chromatography. The enzyme hydrolyzed specifically beta-glucosidic bonds and catalyzed transglucosylation of the beta-glucosyl group of cellobiose to yield 4-O-beta-gentiobiosylglucose in the presence of organic solvents or under neutral conditions.
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