Potentiometric and spectroscopic studies on the copper(II) complexes of peptide hormones containing disulfide bridges

Péter Danyi, Katalin Várnagy, Imre Sóvágó, István Schön, Daniele Sanna, Giovanni Micera

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Copper(II) complexes of oxytocin, 4-Glu-oxytocin, 5-Asp-oxytocin, and GlyGlyGly-Lys8-vasopressin were studied by potentiometric, EPR, and UV-visible spectroscopic methods. The formation of 4N-coordinated complexes was characteristic of all ligands. This type of coordination is especially favored for oxytocin due to the specific conformation of the ring coupled by the disulfide bridge. The coordination of the γ-carboxylate group of 4-Glu-oxytocin and a disulfide sulfur atom of GlyGlyGly-Lys8-vasopressin was reported to occur in the 2N-complexes over medium pH range.

Original languageEnglish
Pages (from-to)69-78
Number of pages10
JournalJournal of Inorganic Biochemistry
Volume60
Issue number1
DOIs
Publication statusPublished - Oct 1995

ASJC Scopus subject areas

  • Biochemistry
  • Inorganic Chemistry

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