Biophysical Studies of the Amyloid β-Peptide: Interactions with Metal Ions and Small Molecules

被引:90
作者
Warmlander, Sebastian [1 ]
Tiiman, Ann [1 ,2 ]
Abelein, Axel [1 ]
Luo, Jinghui [3 ]
Jarvet, Jyri [1 ,4 ]
Soderberg, Kajsa L. [1 ]
Danielsson, Jens [1 ]
Graslund, Astrid [1 ]
机构
[1] Stockholm Univ, Dept Biochem & Biophys, Arrhenius Labs, S-10691 Stockholm, Sweden
[2] Tallinn Univ Technol, Dept Gene Technol, EE-12618 Tallinn, Estonia
[3] Leiden Univ, Gorlaeus Lab, Leiden Inst Chem, NL-2300 RA Leiden, Netherlands
[4] NICPB, EE-12618 Tallinn, Estonia
基金
瑞典研究理事会;
关键词
aggregation; Alzheimer's disease; amyloid beta-peptides; protein aggregation; protein-ligand binding; CELLULAR PRION PROTEIN; ALZHEIMERS A-BETA; WATER-MICELLE ENVIRONMENT; ALPHA-SYNUCLEIN; COPPER-BINDING; CONGO RED; IN-VITRO; STRUCTURAL BASIS; ZINC-BINDING; COORDINATION GEOMETRY;
D O I
10.1002/cbic.201300262
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Alzheimer's disease is the most common of the protein misfolding ("amyloid") diseases. The deposits in the brains of afflicted patients contain as a major fraction an aggregated insoluble form of the so-called amyloid beta-peptides (A beta peptides): fragments of the amyloid precursor protein of 39-43 residues in length. This review focuses on biophysical studies of the A beta peptides: that is, of the aggregation pathways and intermediates observed during aggregation, of the molecular structures observed along these pathways, and of the interactions of A beta with Cu and Zn ions and with small molecules that modify the aggregation pathways. Particular emphasis is placed on studies based on high-resolution and solid-state NMR methods. Theoretical studies relating to the interactions are also included. An emerging picture is that of A beta peptides in aqueous solution undergoing hydrophobic collapse together with identical partners. There then follows a relatively slow process leading to more ordered secondary and tertiary (quaternary) structures in the growing aggregates. These aggregates eventually assemble into elongated fibrils visible by electron microscopy. Small molecules or metal ions that interfere with the aggregation processes give rise to a variety of aggregation products that may be studied in vitro and considered in relation to observations in cell cultures or in vivo. Although the heterogeneous nature of the processes makes detailed structural studies difficult, knowledge and understanding of the underlying physical chemistry might provide a basis for future therapeutic strategies against the disease. A final part of the review deals with the interactions that may occur between the A beta peptides and the prion protein, where the latter is involved in other protein misfolding diseases.
引用
收藏
页码:1692 / 1704
页数:13
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