Functional Stabilization of Cellulase from Aspergillus niger by Conjugation with Dextran-aldehyde |
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| Authors: | Asli Arslan Huriye Kuzu Melda Altikatoglu |
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| Institution: | 1. Yildiz Technical University, Faculty of Chemical and Metallurgical Engineering, Department of Bioengineering, Davutpasa Campus , 34210, Esenler, Istanbul, Turkey;2. Yildiz Technical University, Faculty of Arts and Sciences, Department of Chemistry, Davutpasa Campus , 34210, Esenler, Istanbul, Turkey |
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| Abstract: | The covalent conjugates of cellulase from Aspergillus niger were prepared with various molar ratios by using dextran. The conjugate (nE/nD: 1/5) showed higher activity than purified enzyme at all temperatures after 1 h of incubation and its activity could also be measured at higher temperature. Also, this conjugate lost only 60% activity in 2 h at 70°C in comparison to the purified enzyme, which lost all its activity. In addition, conjugation protected cellulase against denaturation in the presence of sodium dodecylsulfate (residual activity of about 80%) and inactivation by air bubbles (residual activity of about 50% for 4 h). |
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| Keywords: | Cellulase Dextran-aldehyde Conjugate Enzyme stability Incubation |
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