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Issue 41, 2015
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Dioxygen activation in the Cu–amyloid β complex

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Abstract

We investigate, by means of density-functional theory, the binding of dioxygen to Cu(I)–amyloid β (Aβ), one of the first steps in the oxidation of ascorbate by dioxygen. Cu, Aβ, ascorbate and dioxygen are all present in the synapse during neurodegeneration, when the above species can trigger an irreversible oxidative stress inducing the eventual death of neurons. The binding of dioxygen to Cu(I) is possible and its role in dioxygen activation of Cu ligands and of residues in the first coordination sphere is described in atomic detail. Dioxygen is activated when a micro-environment suitable for a square-planar Cu2+ coordination is present and a negatively charged group like Asp 1 carboxylate takes part in the Cu coordination anti to O2.

Graphical abstract: Dioxygen activation in the Cu–amyloid β complex

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Supplementary files

Article information


Submitted
10 Jul 2015
Accepted
21 Sep 2015
First published
22 Sep 2015

Phys. Chem. Chem. Phys., 2015,17, 27270-27274
Article type
Communication
Author version available

Dioxygen activation in the Cu–amyloid β complex

A. Mirats, J. Alí-Torres, L. Rodríguez-Santiago, M. Sodupe and G. La Penna, Phys. Chem. Chem. Phys., 2015, 17, 27270
DOI: 10.1039/C5CP04025F

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