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Rapid Generation of Amyloid from Native Proteins In vitro
Published on: December 5, 2013
Alpha-sheet: The toxic conformer in amyloid diseases?
1Department of Medicinal Chemistry, University of Washington, Seattle, Washington 98195-7610, USA.
Accounts of Chemical Research
|September 20, 2006
Summary
Researchers identified a novel protein structure, the alpha-sheet, using molecular dynamics simulations. This structure may play a role in amyloid diseases as a toxic conformer.
Area of Science:
- Biochemistry
- Structural Biology
- Computational Biology
Background:
- Amyloid diseases are linked to protein misfolding and aggregation.
- Protein Data Bank contains rare instances of alpha-strands and alpha-sheets.
- Previous predictions of alpha-sheet structure exist.
Purpose of the Study:
- To identify and characterize a novel protein secondary structure, the alpha-sheet.
- To investigate the potential role of the alpha-sheet in amyloid diseases.
Main Methods:
- Molecular dynamics (MD) simulations of proteins under amyloidogenic conditions.
- Analysis of existing data in the Protein Data Bank.
- Review of crystal structures of nonnatural peptides.
Main Results:
- Identification of a novel secondary structure termed the alpha-sheet.
- Observation of alpha-sheet occurrences in specific peptide crystal structures.
- Proposal that alpha-sheet formation is associated with amyloidosis.
Conclusions:
- The alpha-sheet is a potentially significant structure in the context of amyloid diseases.
- The alpha-sheet may represent the toxic conformer responsible for disease pathology.
- Further experimental validation and investigation into the role of alpha-sheets in disease are warranted.
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