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Identifying the Minimal Copper- and Zinc-binding Site Sequence in Amyloid-β Peptides

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Minicozzi, Velia, Stellato, Francesco, Comai, Massimiliano, Serra, Mauro Dalla, Potrich, Cristina, Meyer-Klaucke, Wolfram, Morante, Silvia·2008·Journal of Biological Chemistry

Abstract

With a combination of complementary experimental techniques, namely sedimentation assay, Fourier transform infrared spectroscopy, and x-ray absorption spectroscopy, we are able to determine the atomic structure around the metal-binding site in samples where amyloid-beta (Abeta) peptides are complexed with either Cu(II) or Zn(II). Exploiting information obtained on a selected set of fragments of the Abeta peptide, we identify along the sequence the histidine residues coordinated to the metal in the various peptides we have studied (Abeta(1-40), Abeta(1-16), Abeta(1-28), Abeta(5-23), and Abeta(17-40)). Our data can be consistently interpreted assuming that all of the peptides encompassing the minimal 1-16 amino acidic sequence display a copper coordination mode that involves three histidines (His(6), His(13), and His(14)). In zinc-Abeta complexes, despite the fact that the metal coordination appears to be more sensitive to solution condition and shows a less rigid geometry around the binding site, a four-histidine coordination mode is seen to be preferred. Lacking a fourth histidine along the Abeta peptide sequence, this geometrical arrangement hints at a Zn(II)-promoted interpeptide aggregation mode.

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Metadata

Authors
Minicozzi, V., Stellato, F., Comai, M., Serra, M. D., Potrich, C., Meyer-Klaucke, W., & Morante, S.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2008-04
Volume
283
Issue
16
Pages
10784-10792
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2021989110
Cited by
208
References
5
FWCI
8.65
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: Identifying the Minimal Copper- and Zinc-binding Site Sequence in Amyloid-β Peptides. https://app.cochat.ai/papers/10.1074/jbc.m707109200
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Minicozzi, V., Stellato, F., Comai, M., Serra, M. D., Potrich, C., Meyer-Klaucke, W., & Morante, S. (2008). Identifying the Minimal Copper- and Zinc-binding Site Sequence in Amyloid-β Peptides. Journal of Biological Chemistry. https://doi.org/10.1074/jbc.m707109200

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