International Journal of Biological Macromolecules 2011-12-01

1,3-β-Glucanase from Vigna aconitifolia and its possible use in enzyme bioreactor fabrication.

Rakesh Mohan Kestwal, Dipali Bagal-Kestwal, Been Huang Chiang

Index: Int. J. Biol. Macromol. 49(5) , 894-9, (2011)

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Abstract

Endo-1,3(4)-β-glucanase (EC 3.2.1.6) from Vigna aconitifolia sprouts was purified to 14.5 fold by gel filtration and ion-exchange chromatography. The enzyme was found to be a glycoprotein, its activity was Ca(2+) dependent and specific for β-1,3 linkages in different polysaccharides. The K(m) value of the enzyme was estimated to be 3.0 mg ml(-1) for β-D-glucan as substrate. Circular dichroism studies revealed 8% α-helix, 48% β-pleated and 44% random coil in its secondary structure. Purified β-glucanase was then successfully co-immobilized with glucose oxidase in agarose-chitosan beads, showing better immobilization yield, operational range and stability as compared with the crude β-glucanase beads. The immobilized β-glucanase was successfully used for mini-bioreactor fabrication.Copyright © 2011 Elsevier B.V. All rights reserved.