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Atomic Force Microscopy Study of Peptides Homologous to Beta-Domain of Alpha-Lactalbumins

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Symmetrical peptide GYDTQAIVENNESTEYG (WT, Wild Type) identical to 35-51 aminoacid residues of human alpha-lactalbumin (HLA) and peptide GYDTQTVVNNNGHTDYG (ID, IDeal symmetry) homologous to betadomain of mammalian alpha-lactalbumins can form amyloid-like fibrils in conditions required for fibrillogenesis of HLA. The latter peptide can also form fibrils in deionized water. Fibrils formed by these peptides can cause forming of HLA amyloid-like aggregates in physiological conditions. These results provide an evidence for presence of amyloidogenic determinant in beta-domain of alpha-lactalbumin. Thus, symmetry in the primary structure may play the role in fibrillogenesis of proteins.

Keywords: alpha-lactalbumin; atomic force microscopy; fibrillogenesis; gydtqaivennesteyg; gydtqtvvnnnghtdyg; symmetry

Document Type: Research Article


Publication date: 2007-05-01

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  • Protein & Peptide Letters publishes short papers in all important aspects of protein and peptide research, including structural studies, recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, drug design etc. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallisation, and preliminary structure determinations of biologically important proteins are acceptable. Purely theoretical papers are also acceptable provided they provide new insight into the principles of protein/peptide structure and function.
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