Chapter title |
Detection of Helical Intermediates During Amyloid Formation by Intrinsically Disordered Polypeptides and Proteins.
|
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Chapter number | 4 |
Book title |
Protein Amyloid Aggregation
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Published in |
Methods in molecular biology, January 2016
|
DOI | 10.1007/978-1-4939-2978-8_4 |
Pubmed ID | |
Book ISBNs |
978-1-4939-2977-1, 978-1-4939-2978-8
|
Authors |
Abedini, Andisheh, Cao, Ping, Raleigh, Daniel P, Andisheh Abedini, Ping Cao, Daniel P. Raleigh |
Abstract |
Amyloid formation and aberrant protein aggregation are hallmarks of more than 30 different human diseases. The proteins that form amyloid can be divided into two structural classes: those that form compact, well-ordered, globular structures in their unaggregated state and those that are intrinsically disordered in their unaggregated states. The latter include the Aβ peptide of Alzheimer's disease, islet amyloid polypeptide (IAPP, amylin) implicated in type 2 diabetes and α-synuclein, which is linked to Parkinson's disease. Work in the last 10 years has highlighted the potential role of pre-amyloid intermediates in cytotoxicity and has focused attention on their properties. A number of intrinsically disordered proteins appear to form helical intermediates during amyloid formation. We discuss the spectroscopic methods employed to detect and characterize helical intermediates in homogenous solution and in membrane-catalyzed amyloid formation, with the emphasis on the application of circular dichroism (CD). IAPP is used as an example, but the methods are generally applicable. |
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