Insights into the mechanisms of amyloid formation of Zn(II)-Ab11-28: pH-dependent zinc coordination and overall charge as key parameters for kinetics and the structure of Zn(II)-Ab11-28 aggregates |
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Authors: | Bruno Alies Giovanni LaPenna Stéphanie Sayen Emmanuel Guillon Christelle Hureau Peter Faller |
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Institution: | Laboratoire de Chimie de Coordination, CNRS, 205 route de Narbonne, BP 44099, F-31077 Toulouse Cedex 4, France. |
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Abstract: | Self-assembly of amyloidogenic peptides and their metal complexes are of multiple interest including their association with several neurological diseases. Therefore, a better understanding of the role of metal ions in the aggregation process is of broad interest. We report pH-dependent structural and aggregation studies on Zn(II) binding to the amyloidogenic peptide Ab11-28. The results suggest that coordination of the N-terminal amine to Zn(II) is responsible for the inhibition of amyloid formation and the overall charge for amorphous aggregates. |
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