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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...
Protein Folding01:22

Protein Folding

Overview
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...
Protein and Protein Structure02:15

Protein and Protein Structure

Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.
A protein's shape is critical to its function. For example, an enzyme can...

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Updated: Jul 2, 2026

Microfluidic Mixers for Studying Protein Folding
12:42

Microfluidic Mixers for Studying Protein Folding

Published on: April 10, 2012

Compactness determines protein folding type.

Oxana V Galzitskaya1, Natalya S Bogatyreva, Dmitry N Ivankov

  • 1Institute of Protein Research, Russian Academy of Sciences, Institutskaya Str. 4, Pushchino, Moscow Region 142290, Russia. ogalzit@vega.protres.ru

Journal of Bioinformatics and Computational Biology
|September 4, 2008
PubMed
Summary
This summary is machine-generated.

Protein compactness influences protein folding mechanisms. More compact proteins exhibit multi-state folding kinetics, while less compact proteins show two-state kinetics, impacting folding rates and pathways.

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Last Updated: Jul 2, 2026

Microfluidic Mixers for Studying Protein Folding
12:42

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Published on: April 10, 2012

Investigating Protein Sequence-structure-dynamics Relationships with Bio3D-web
09:51

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Published on: July 16, 2017

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

Area of Science:

  • Biochemistry
  • Structural Biology
  • Protein Dynamics

Background:

  • Protein folding is crucial for biological function.
  • Understanding protein folding mechanisms is a key challenge in biochemistry.
  • Protein structure and dynamics are intrinsically linked to folding pathways.

Purpose of the Study:

  • To investigate the role of protein compactness in determining protein folding mechanisms.
  • To quantify the relationship between protein compactness and folding kinetics.
  • To explore if compactness explains differences in folding rates and mechanisms among homologous proteins.

Main Methods:

  • Defined protein compactness as the ratio of accessible surface area to the ideal sphere of equivalent volume.
  • Analyzed compactness values for proteins exhibiting multi-state and two-state folding kinetics.
  • Compared compactness in homologous proteins to assess its influence on folding rates and mechanisms.

Main Results:

  • Proteins with multi-state folding kinetics are, on average, more compact (1.49+/-0.02) than those with two-state kinetics (1.59+/-0.03) within the 101-151 amino acid residue size range.
  • Protein compactness was found to be a significant factor differentiating folding mechanisms.
  • Compactness differences in homologous proteins correlated with variations in folding rates and mechanisms.

Conclusions:

  • Protein compactness is a determinant factor in protein folding mechanisms.
  • The degree of protein compactness influences whether a protein follows multi-state or two-state folding kinetics.
  • Compactness serves as a predictive feature for folding rates and mechanisms, particularly within homologous protein families.