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Related Concept Videos

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...
Protein Folding01:22

Protein Folding

Overview
Protein Folding01:22

Protein Folding

Overview
Protein Denaturation01:28

Protein Denaturation

The function of proteins depends on their native three-dimensional structure, which is dictated by the amino acid sequence of the specific protein. Folding of the polypeptide chain takes place under specific conditions that energetically favor the folded conformation. In contrast, protein denaturation occurs spontaneously under unfavorable conditions that disrupt the integrity of the folded conformation. Thus, the chemical and physical environment of a protein, such as significant changes in pH...
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...
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...

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Related Experiment Video

Updated: Jul 10, 2026

Thermodynamics of Membrane Protein Folding Measured by Fluorescence Spectroscopy
10:09

Thermodynamics of Membrane Protein Folding Measured by Fluorescence Spectroscopy

Published on: April 28, 2011

Protein folding and stability using denaturants.

Timothy O Street1, Naomi Courtemanche, Doug Barrick

  • 1T. C. Jenkins Department of Biophysics, The Johns Hopkins University, Baltimore, Maryland 21218, USA.

Methods in Cell Biology
|October 30, 2007
PubMed
Summary

This chapter details chemical denaturation methods for measuring protein folding thermodynamics and stability. These insights into protein structure, function, and mutation effects are crucial for biophysics and molecular biology research.

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Microfluidic Mixers for Studying Protein Folding
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Last Updated: Jul 10, 2026

Thermodynamics of Membrane Protein Folding Measured by Fluorescence Spectroscopy
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Microfluidic Mixers for Studying Protein Folding
12:42

Microfluidic Mixers for Studying Protein Folding

Published on: April 10, 2012

Area of Science:

  • Biophysics
  • Structural Biology
  • Molecular Biology

Background:

  • Protein folding and stability are critical for understanding protein structure, function, and interactions.
  • Chemical denaturation is an accessible method to study protein thermodynamics.
  • Previous studies have highlighted the importance of stability measurements in various biological contexts.

Purpose of the Study:

  • To describe methods, theory, and data analysis for determining protein folding thermodynamics via chemical denaturation.
  • To provide a foundation for precise protein stability measurements.
  • To illustrate the application of stability measurements using examples from the Notch signaling pathway.

Main Methods:

  • Chemical denaturation experiments to probe protein unfolding.
  • Analysis of folding reactions using mechanistic and statistical models.
  • Interpretation of thermodynamic parameters to understand protein structure and function.

Main Results:

  • Detailed methodology for chemical denaturation experiments.
  • Framework for analyzing protein folding thermodynamics.
  • Demonstration of how stability measurements inform on protein structure, domain organization, and mutation effects.

Conclusions:

  • Chemical denaturation is a powerful and accessible technique for measuring protein folding thermodynamics.
  • Stability measurements offer valuable insights into protein structure-function relationships.
  • This chapter equips researchers with the knowledge to perform and interpret protein stability studies.