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Interaction of A beta peptide (1-40) with amino acid aluminium complexes: relevance to Alzheimer's disease

Ramesh, J and Madhav, TR and Vatsala, S and Ramakrishna, T and Easwaran, KRK and Guillard, O and Deloncle, R (1999) Interaction of A beta peptide (1-40) with amino acid aluminium complexes: relevance to Alzheimer's disease. In: Alzheimers Reports, 2 (1). pp. 31-35.

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A beta (39-43 aminoacid residues) is the principal peptide component of amyloid deposits in Alzheimer's disease (AD). A beta peptide is derived from the amyloid precursor protein (APP) in which mutations give rise to many forms of familial AD. Aluminium is reported to play a key role in inducing conformational change in the synthetic beta-amyloid peptide (1-40)from alpha-helix to beta-pleated sheet, leading to aggregation and fibrillar formation. We have studied the interaction of amino acid-Al complexes such as D-Asp-Al and L-Glu-Al with A beta(1-40) in TFE/buffer (70% TFE and 30% H2O v/v pH 6.7) mixture using CD spectroscopy. The interaction of either of these amino acid complexes with A beta(1-40) results in loss of alpha-helical content and the peptide is more unstructured compared to free Al3+ in the solution. Our data strongly support the idea, that the Al3+ in the form of aminoacid-Al complexes is more effective in inducing random coil conformation in the A beta peptide than the free Al3+ present in the solution.

Item Type: Journal Article
Publication: Alzheimers Reports
Publisher: Medical Science Journals
Additional Information: Copyright of this article belongs to Alzheimers Reports.
Department/Centre: Division of Biological Sciences > Molecular Biophysics Unit
Date Deposited: 23 Jun 2011 07:00
Last Modified: 23 Jun 2011 07:00
URI: http://eprints.iisc.ac.in/id/eprint/38592

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