Affiliation:
1. Pulp and Paper Research Institute of Canada, Pointe Claire, Quebec, Canada H9R 3J9
Abstract
Optimization experiments with response surface statistical analysis were performed with
Schizophyllum commune
to obtain high β-glucosidase yields. The factors in the optimization experiment were the concentrations of cellulose, peptone, and KH
2
PO
4
. Their optimal values were 3.2, 3.0, and 0.2 g/100 ml, respectively. Enzyme assays revealed very high β-glucosidase (22.2 U/ml) and cellobiase (68.9 U/ml) yields. The avicelase yield was low as compared with that from
Trichoderma reesei
. Mixtures of
S. commune
and
T. reesei
culture filtrates caused faster and more extensive saccharification of Avicel than could be achieved by either filtrate alone. A β-glucosidase was isolated and purified from the optimized culture filtrate of
S. commune
. The electrophoretic mobility of the purified β-glucosidase indicated a molecular weight of 97,000. The amino acid composition was similar to that of β-glucosidase from
T. reesei
. The acidic (aspartate and glutamate) residues or their amides or both made up approximately 20% of the protein. The NH
2
-terminal amino acid of the enzyme was histidine.
Publisher
American Society for Microbiology
Subject
Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology
Cited by
79 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献