The role of copper(II) in the aggregation of human amylin(660 views) Sinopoli A, Magri A, Milardi D, Pappalardo M, Pucci P, Flagiello A, Titman JJ, Nicoletti VG, Caruso G, Pappalardo G, GrassoG
Keywords: Amylin, Chymotrypsin, Copper Ion, Elastase, Subtilisin, Thioflavine, Article, Carbon Nuclear Magnetic Resonance, Cell Viability, Circular Dichroism, Conformational Transition, Controlled Study, Deuterium Hydrogen Exchange, High Performance Liquid Chromatography, Human, Human Cell, Human Cell Culture, In Vitro Study, Mass Spectrometry, Molecular Weight, Mtt Assay, Protein Conformation, Protein Degradation, Protein Secondary Structure, Amino Acid Sequence, Cell Line, Tumor, Cell Survival, Metabolism, Islet Amyloid Polypeptide, Chemistry, Models, Molecular Sequence Data, Protein Aggregates, Protein Structure, Proteolysis,
Affiliations: *** IBB - CNR ***
Dottorato Internazionale in Biomedicina Traslazionale, Universita degli Studi di Catania, Viale Andrea Doria 6, 95125, Catania, Italy.,
Istituto Biostrutture e Bioimmagini, CNR, Via P. Gaifami 18Catania, Italy
Dipartimento di Scienze Chimiche, Università Degli Studi di Catania, Viale Andrea Doria 6Catania, Italy
School of Chemistry, University of Nottingham, University ParkNottingham, United Kingdom
Istituto Nazionale di Biostrutture e Biosistemi (INBB) - Sez. Biomolecole, Consorzio Interuniversitario, Viale medaglie d'Oro 305Rome, Italy
References: Not available.
The role of copper(II) in the aggregation of human amylin
Amylin is a 37-residue peptide hormone produced by the islet beta-cells of pancreas and the formation of amylin aggregates is strongly associated with beta-cell degeneration in type 2 diabetes, as demonstrated by more than 95% of patients exhibiting amylin amyloid upon autopsy. It is widely recognized that metal ions such as copper(II) have been implicated in the aggregation process of amyloidogenic peptides such as Abeta and alpha-synuclein and there is evidence that amylin self-assembly is also largely affected by copper(II). For this reason, in this work, the role of copper(II) in the aggregation of amylin has been investigated by several different experimental approaches. Mass spectrometric investigations show that copper(II) induces significant changes in the amylin structure, which decrease the protein fibrillogenesis as observed by ThT measurements. Accordingly, solid-state NMR experiments together with computational analysis carried out on a model amylin fragment confirmed the non-fibrillogenic nature of the copper(II) induced aggregated structure. Finally, the presence of copper(II) is also shown to have a major influence on amylin proneness to be degraded by proteases and cytotoxicity studies on different cell cultures are reported.
The role of copper(II) in the aggregation of human amylin
No results.
The role of copper(II) in the aggregation of human amylin
Kállay C, Dávid A, Timári S, Nagy EM, Sanna D, Garribba E, Micera G, De Bona P, Pappalardo G, Rizzarelli E, Sóvágó I * Copper(II) complexes of rat amylin fragments(572 views) Dalton T (ISSN: 1477-9234, 1477-9226, 1477-9234electronic), 2011 Oct 14; 40(38): 9711-9721. Impact Factor:3.838 ViewExport to BibTeXExport to EndNote