Glutaraldehyde-activated chitosan matrix for immobilization of a novel cysteine protease, procerain B |
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Authors: | Singh Abhay Narayan Singh Sushant Suthar Neeraj Dubey Vikash Kumar |
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Institution: | Department of Biotechnology, Indian Institute of Technology Guwahati, Assam, India 781039. |
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Abstract: | Proteases have several applications in the food industry. We report the immobilization of procerain B, a novel cysteine protease, on glutaraldehyde-activated chitosan beads through covalent attachment. Glutaraldehyde not only serves as a cross-linking agent but also links the procerain B on the surface of bead through primary amine group (either lysine side chain or N-terminal) by Schiff base linkage. Immobilized procerain B was characterized for optimum functional range and stability with respect to pH and temperature. The chitosan-immobilized procerain B has broad pH and thermal optima. The effects of substrate concentration and reusability of immobilized beads were also studied. It showed nearly 50% activity until the 10th use. |
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