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Amyloid Fibrils

Amyloid Fibrils

Amyloid fibrils are aggregates of misfolded proteins. Under most circumstances, misfolded proteins are either refolded by chaperone proteins or degraded by the proteasome. However, in the case of a mutation or a disease, these proteins can accumulate to form large clusters and often further assemble to form elongated fibers, called fibrils.
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining, normally used to...

Amyloid Fibrils

Amyloid Fibrils

Amyloid fibrils are aggregates of misfolded proteins. Under most circumstances, misfolded proteins are either refolded by chaperone proteins or degraded by the proteasome. However, in the case of a mutation or a disease, these proteins can accumulate to form large clusters and often further assemble to form elongated fibers, called fibrils.
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining, normally used to...

Alzheimer Disease ll: Pathophysiology

Alzheimer Disease ll: Pathophysiology

Alzheimer disease involves structural changes in the brain that begin long before symptoms appear. The most distinctive features are extracellular neuritic plaques and intracellular neurofibrillary tangles.Neuritic plaques form in the cerebral cortex and around blood vessels. These plaques contain a dense core of beta-amyloid (Aβ)—a toxic protein fragment that clumps outside neurons. The core is surrounded by damaged neuronal extensions, as well as reactive astrocytes and microglia. Abnormal...

Protein Folding

Protein Folding

Protein Folding

Protein Folding

Proteins are chains of amino acids linked together by peptide bonds. Upon synthesis, a protein folds into a three-dimensional conformation, critical to its biological function. Interactions between its constituent amino acids guide protein folding, and hence the protein structure is primarily dependent on its amino acid sequence.
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Protein Organization

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Related Experiment Video

Updated: May 11, 2026

Rapid Generation of Amyloid from Native Proteins In vitro

Rapid Generation of Amyloid from Native Proteins In vitro

Published on: December 5, 2013

Structural aspects of amyloid formation.

Xavier Salvatella¹

¹ICREA, Barcelona, Spain.

Progress in Molecular Biology and Translational Science

|May 14, 2013

Summary

Amyloid fibrils, protein aggregates linked to neurodegenerative diseases, are extensively studied for their structure and formation mechanisms. Research focuses on the relationship between monomeric protein properties and the resulting fibril structures.

Area of Science:

Biochemistry and Molecular Biology
Neuroscience
Structural Biology

Background:

Amyloid fibrils are insoluble protein aggregates characterized by β-secondary structure.
Fibril formation is associated with neurodegenerative disorders like Alzheimer's and Parkinson's diseases.
Understanding these fibrils is crucial for disease research and therapeutic development.

Purpose of the Study:

To review current knowledge on the relationship between monomeric protein structure and amyloid fibril properties.
To provide an account of the mechanisms, structures, and stabilizing forces of amyloid fibrils.
To offer key references for further study on amyloid fibril formation.

Main Methods:

Review of existing scientific literature and research findings.

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Characterization of pH-Dependent Reversible Self-Assembly of Amyloid Beta 1-40-Coated Gold Colloids

Characterization of pH-Dependent Reversible Self-Assembly of Amyloid Beta 1-40-Coated Gold Colloids

Published on: March 21, 2025

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Last Updated: May 11, 2026

Rapid Generation of Amyloid from Native Proteins In vitro

Rapid Generation of Amyloid from Native Proteins In vitro

Published on: December 5, 2013

Characterization of pH-Dependent Reversible Self-Assembly of Amyloid Beta 1-40-Coated Gold Colloids

Characterization of pH-Dependent Reversible Self-Assembly of Amyloid Beta 1-40-Coated Gold Colloids

Published on: March 21, 2025

Analysis of structural properties of monomeric proteins and their corresponding amyloid aggregates.

Examination of fibrillation mechanisms and the forces governing fibril stability.

Main Results:

Significant progress has been made in understanding the properties of proteins prone to fibrillation.
Detailed insights into the mechanisms and molecular structures of amyloid fibrils have been gained.
The forces stabilizing amyloid fibrils are increasingly well-characterized.

Conclusions:

The relationship between monomeric protein structure and aggregate properties is a key area of study.
Continued research into amyloid fibrils is vital for understanding and combating associated neurodegenerative diseases.
This review synthesizes current knowledge and highlights areas for future investigation.