Issue 28, 2010

The unusual coordination abilities of the peptides with βXaaHisGlyHis sequence. The influence of structural modification of the peptide chain on the copper(ii) binding

Abstract

The coordination abilities of tetrapeptides containing β-amino acids towards Cu(II) ions are presented. The studied tetrapeptides were: Ac-βAlaHisGlyHis, βAlaHisGlyHis, Ac-βAspHisGlyHis, βAspHisGlyHis, Ac-βAspHisGly-DHis and βAspHisGly-DHis. Thorough potentiometric titrations were carried out to establish the stoichiometry of the resulting metal–ligand complexes and the role of free -αCOO side chain group in metal binding. The copper(II) coordination mode of the complexes was investigated by performing detailed spectroscopic analyses (UV-Vis, EPR, CD) in strict correlation with potentiometric measurements.

Graphical abstract: The unusual coordination abilities of the peptides with βXaaHisGlyHis sequence. The influence of structural modification of the peptide chain on the copper(ii) binding

Article information

Article type
Paper
Submitted
09 Nov 2009
Accepted
07 May 2010
First published
11 Jun 2010

Dalton Trans., 2010,39, 6518-6523

The unusual coordination abilities of the peptides with βXaaHisGlyHis sequence. The influence of structural modification of the peptide chain on the copper(II) binding

J. Brasuń, H. Czapor, A. Matera-Witkiewicz, A. Kotynia, A. Sochacka and M. Cebrat, Dalton Trans., 2010, 39, 6518 DOI: 10.1039/B923371G

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