Citation

Pontecchiani F, Simonovsky E, Wieczorek R, Barbosa N, Rowinska-Zyrek M, Potocki S, Remelli M, Miller Y, Kozlowski H. Dalton Trans. 2014; 43(44): 16680-16689.

Affiliation

Department of Chemical and Pharmaceutical Sciences, University of Ferrara, via Fossato di Mortara 17, I-44121 Ferrara, Italy. rmm@unife.it.

Copyright

(Copyright © 2014, Royal Society of Chemistry)

DOI

10.1039/c4dt02257b

PMID

25266233

Abstract

Copper complexes of a poly-His/poly-Gly peptide (EDDHHHHHHHHHGVGGGGGGGGGG-NH2), a natural component of a snake venom, were studied by means of both experimental (thermodynamic, spectroscopic and MS) techniques and molecular dynamics (MD) simulations and density functional theory (DFT) calculations. This peptide proved to be an exceptionally effective copper chelator, forming complexes which are thermodynamically more stable than those formed by both the albumin-like ATCUN motif and several other poly-histidine protein fragments. We show that, in a poly-histidine stretch, copper seems to prefer binding to residues separated by one amino acid and that a correlation between an α-helical structure of the predicted complexes and their thermodynamic stability is observed.

Language: en