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Nanobiocatalyst consisting of immobilized α-amylase on montmorillonite exhibiting enhanced enzymatic performance based on the allosteric effect.
- Source :
-
Colloids and surfaces. B, Biointerfaces [Colloids Surf B Biointerfaces] 2022 Mar; Vol. 211, pp. 112290. Date of Electronic Publication: 2021 Dec 16. - Publication Year :
- 2022
-
Abstract
- Enzyme immobilization on nanostructured substrates is an emerging method for the efficient development of nanobiocatalysts to enhance enzymatic performance. In this study, a novel α-amylase nanobiocatalytic system was constructed based on the allosteric activation of the enzyme and its immobilization on a natural nanostructured mineral montmorillonite. The strategy of allosteric modulation and immobilization, equipped the immobilized α-amylase with higher catalytic activity and greater stability (compared to those of free α-amylase) over a broad range of pH values (4.5-9.0) and temperatures (30-80 °C). Kinetic experiments revealed that although the immobilized α-amylase possessed a considerably lower affinity for its substrate, its catalytic activity was higher than that of free α-amylase, likely owing to allosteric modulation. Thus, this study demonstrates a convenient and environmentally benign immobilization strategy to construct a nanobiocatalytic α-amylase system that exploits the phenomenon of allosteric activation of the enzyme and lays the foundation for further industrial applications.<br /> (Copyright © 2021 Elsevier B.V. All rights reserved.)
Details
- Language :
- English
- ISSN :
- 1873-4367
- Volume :
- 211
- Database :
- MEDLINE
- Journal :
- Colloids and surfaces. B, Biointerfaces
- Publication Type :
- Academic Journal
- Accession number :
- 34929483
- Full Text :
- https://doi.org/10.1016/j.colsurfb.2021.112290