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Journal Article

Interaction of Cu(i) with the Met-X3-Met motif of alpha-synuclein: Binding ligands, affinity and structural features.

MPS-Authors
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Strohäker,  T.
Research Group of Protein Structure Determination using NMR, MPI for biophysical chemistry, Max Planck Society;

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Zweckstetter,  M.
Research Group of Protein Structure Determination using NMR, MPI for biophysical chemistry, Max Planck Society;

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Griesinger,  C.
Department of NMR Based Structural Biology, MPI for biophysical chemistry, Max Planck Society;

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Fernandez,  C. O.
Department of NMR Based Structural Biology, MPI for biophysical chemistry, Max Planck Society;

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Fulltext (public)

3001166.pdf
(Publisher version), 3MB

Supplementary Material (public)

3001166_Suppl.pdf
(Supplementary material), 258KB

Citation

Gentile, I., Garro, H. A., Delgado Ocaña, S., Gonzalez, N., Strohäker, T., Schibich, D., et al. (2018). Interaction of Cu(i) with the Met-X3-Met motif of alpha-synuclein: Binding ligands, affinity and structural features. Metallomics, 10(10), 1383-1389. doi:10.1039/c8mt00232k.


Cite as: http://hdl.handle.net/21.11116/0000-0002-46F8-8
Abstract
The identity of the Cu(i) binding ligands at Met-X3-Met site of AcαS and its role into the affinity and structural properties of the interaction were elucidated by NMR spectroscopy. We provide evidence that the source of ligands for Cu(i) binding to the Met-X3-Met site comes from the N-terminal acetyl group and the Met-1, Asp-2 and Met-5 residues. From the study of site-directed mutants and synthetic peptide models of αS we demonstrated the critical role played by Met-1 and Met-5 residues on the binding affinity of the Cu(i) complex, acting as the main metal anchoring residues. While having a more modest impact in the affinity features of Cu(i) binding, as compared to the Met residues, the N-terminal acetyl group and Asp-2 are important in promoting local helical conformations, contributing to the stabilization of these structures by favoring Cu(i) binding.