Ternary Complexes from Cu(II)–Oligopeptide and N-Acetyl-L-histidine, as Studied by Circular Dichroism Spectroscopy

The Cu(II) complexes of oligopeptides, Cu(H−iL); i = 1, 2, or 3, reacted with N-acetyl-L-histidine (AHis) to form ternary complexes, Cu(H−jL)(AHis); j = 1 or 2. The Cu(H−1L) species formed Cu(H−1L)(AHis), which was either dimerized to [Cu(H−1L)]2(AHis−) or converted stepwise to Cu(AHis)n; n = 3, 4....

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Bibliographic Details
Published in:Bulletin of the Chemical Society of Japan 2004-08, Vol.77 (8), p.1475-1477
Main Authors: Hanaki, Akira, Ueda, Jun-ichi, Ikota, Nobuo
Format: Article
Language:English
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Summary:The Cu(II) complexes of oligopeptides, Cu(H−iL); i = 1, 2, or 3, reacted with N-acetyl-L-histidine (AHis) to form ternary complexes, Cu(H−jL)(AHis); j = 1 or 2. The Cu(H−1L) species formed Cu(H−1L)(AHis), which was either dimerized to [Cu(H−1L)]2(AHis−) or converted stepwise to Cu(AHis)n; n = 3, 4. The reaction of the Cu(H−2L) or Cu(H−3L) species with AHis led to the formation of Cu(H−2L)(AHis), and the formation constants of the ternary complexes were small, on the magnitude of 10−1–101 M−1.
ISSN:0009-2673
1348-0634
DOI:10.1246/bcsj.77.1475