Thermodynamic Study of Human Serum Albumin upon Interaction with Ytterbium (III)

Complexation reaction between Yb3+ and human serum albumin is examined using isothermal titration calorimetry (ITC). The extension solvation theory was used to reproduce the enthalpies of HAS + Yb3+ interactions over the whole range of Yb3+ concentrations. The binding parameters recovered from this model were attributed to the structural change of HSA. The results show that Yb3+ ions bind to HSA with three equivalent affinity sites. It was found that in the high concentrations of the ytterbium ions, the HSA structure was destabilized.

Abstract licence: CC BY

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