The influence of penicillamine/cysteine mutation on the metal complexes of peptides

Ágnes Grenács, Norbert Lihi, I. Sóvágó, K. Várnagy

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

N-Terminally free but C-terminally amidated peptides Pen-SSACS-NH2 and CSSA-Pen-S-NH2 containing l-penicillamine (Pen) in sequence have been synthesized and their nickel(ii), zinc(ii) and cadmium(ii) complexes were studied by potentiometric and spectroscopic measurements. This study is the first example of the synthesis and metal complexes of peptides containing penicillamine in a peptide sequence constructed from natural amino acids. The data were compared to those of the two cysteine counterparts, CSSACS-NH2. It was found that the replacement of l-cysteine with l-penicillamine has a significant impact on the complex formation processes with nickel(ii) ions. The major differences include the suppression of polynuclear complex formation, the enhanced metal binding affinity of the amino terminus and the increased tendency for the formation of amide bonded species. The tridentate (NH2,S-,S-) coordination was characteristic of the zinc(ii) and cadmium(ii) complexes in the case of all three peptides containing two thiolate functions.

Original languageEnglish
Pages (from-to)13472-13481
Number of pages10
JournalDalton Transactions
Volume46
Issue number39
DOIs
Publication statusPublished - Jan 1 2017

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Penicillamine
Coordination Complexes
Peptides
Nickel
Cadmium
Cysteine
Zinc
Amides
Metals
penicillamine cysteine disulfide
Ions
Amino Acids

ASJC Scopus subject areas

  • Inorganic Chemistry

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The influence of penicillamine/cysteine mutation on the metal complexes of peptides. / Grenács, Ágnes; Lihi, Norbert; Sóvágó, I.; Várnagy, K.

In: Dalton Transactions, Vol. 46, No. 39, 01.01.2017, p. 13472-13481.

Research output: Contribution to journalArticle

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