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Journal of Carbohydrate Chemistry Volume 36, 2017 - Issue 8-9
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Original Articles

Urease-Dextran complexes with enhanced enzymatic activity and stability

Melda Altıkatoğlu YapaözYildiz Technical University, Faculty of Arts and Sciences, Department of Chemistry, Davutpasa Campus Esenler, Istanbul, TURKEYCorrespondence[email protected]
&
Azra DestanoğluYildiz Technical University, Faculty of Arts and Sciences, Department of Chemistry, Davutpasa Campus Esenler, Istanbul, TURKEY
Pages 325-335 | Received 03 Nov 2016, Accepted 30 Oct 2017, Published online: 04 Dec 2017
 
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ABSTRACT

In this study, the urease-dextran non-covalent complexes in various molar ratios were synthesized and compared to the free enzyme in terms of pH, temperature, thermal and storage stabilities. Especially, the complex with a molar ratio of nU/nDA = 40/1 showed highest thermal stability and had ca. 1.4-fold at 25°C and 2.5-fold at 80°C higher activity than the free enzyme. The complex showed a high catalytic activity in organic solvent. In addition, the thermal and storage stabilities of urease were improved greatly as dextran complex, which has advantages for usage in practice.

GRAPHICAL ABSTRACT

Acknowledgment

This study was supported by grants from the Yildiz Technical University research fund (2016–01-02-KAP02) and TUBITAK research fund (114Z138).

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