Abstract
The cyanide ion was studied as an effecter of Jack bean urease at 300 K in 30 mmol⋅L−1 Tris buffer, pH=7. The inhibition was investigated by isothermal titration calorimetry (ITC). The extended solvation model was used for CN−+JBU interaction over the whole range of CN− concentrations. The binding parameters recovered from the solvation model were attributed to the interaction with cyanide ion. It was found that cyanide ion acted as a noncooperative inhibitor of urease, and there is a set of 12 identical and independent binding sites for CN− ions. The dissociation equilibrium constant is 749.99 μmol⋅L−1. The molar enthalpy of binding is ΔH=−13.60 kJ⋅mol−1.
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Rezaei Behbehani, G., Saboury, A.A., Mohebbian, M. et al. A Structural and Calorimetric Study on the Interaction Between Jack Bean Urease and Cyanide Ion. J Solution Chem 38, 1612–1621 (2009). https://doi.org/10.1007/s10953-009-9471-7
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DOI: https://doi.org/10.1007/s10953-009-9471-7