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Related Concept Videos

Protein Folding01:22

Protein Folding

Overview
Protein Folding01:25

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.
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
Intrinsically Disordered Proteins02:18

Intrinsically Disordered Proteins

Intrinsically disordered proteins are a group of proteins that do not fold into specific three-dimensional structures. Their structural flexibility allows them to complement ordered proteins to perform functions that are inaccessible to rigid structures. They are more common in eukaryotes than prokaryotes and may either be exclusively intrinsically disordered or hybrid proteins, consisting of a mix of ordered and disordered regions. The absence of a rigid structure in these proteins can be...
Molecular Chaperones and Protein Folding03:00

Molecular Chaperones and Protein Folding

The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein.
The...
Covalently Linked Protein Regulators02:04

Covalently Linked Protein Regulators

Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein.
Ligand Binding Sites02:40

Ligand Binding Sites

Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...

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Related Experiment Video

Updated: Jun 23, 2026

Evaluation of the Impact of Protein Aggregation on Cellular Oxidative Stress in Yeast
11:04

Evaluation of the Impact of Protein Aggregation on Cellular Oxidative Stress in Yeast

Published on: June 23, 2018

Position-dependent electrostatic protection against protein aggregation.

Alexander K Buell1, Gian Gaetano Tartaglia, Neil R Birkett

  • 1Nanoscience Centre, University of Cambridge, J. J. Thomson Avenue, CB3 0FF, Cambridge, UK.

Chembiochem : a European Journal of Chemical Biology
|May 6, 2009
PubMed
Summary
This summary is machine-generated.

Preventing protein aggregation, a key factor in diseases, can be achieved with minor primary structure modifications. Introducing a single charge in specific regions significantly slows amyloid fibril formation, reducing aggregation efficiency.

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Evaluation of the Impact of Protein Aggregation on Cellular Oxidative Stress in Yeast
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Genetic and Biochemical Approaches for In Vivo and In Vitro Assessment of Protein Oligomerization: The Ryanodine Receptor Case Study
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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Protein Science

Background:

  • Protein aggregation is implicated in various neurodegenerative diseases.
  • Controlling protein aggregation is crucial for therapeutic development.

Purpose of the Study:

  • To investigate the impact of small primary structure changes on protein aggregation rates.
  • To identify specific regions within proteins that act as 'gatekeepers' for aggregation.

Main Methods:

  • Utilized rational protein design principles.
  • Performed quantitative measurements of amyloid fibril growth rates.
  • Introduced single-charge mutations in targeted regions.

Main Results:

  • Demonstrated that minimal structural changes can significantly inhibit protein aggregation.
  • Showed that adding a single charge in gatekeeper regions is sufficient to slow fibril growth.
  • Extended the timescale of amyloid fibril formation from minutes to weeks.

Conclusions:

  • Small modifications to protein primary structure offer a powerful strategy to prevent aggregation.
  • Targeting specific gatekeeper regions provides a precise method for controlling amyloid formation.
  • This approach has significant implications for developing therapies against protein aggregation diseases.