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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

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Protein Organization01:24

Protein Organization

Proteins are polymers of amino acid residues. They are versatile and responsible for different cellular functions, including DNA replication, molecular transport, catalysis, and structural support. Proteins have a hierarchical structure comprising at least three levels of organization: primary, secondary, and tertiary structure. Some large proteins have a quaternary structure where individual protein subunits are linked together.
The primary structure of a protein is its amino acid sequence.
Protein Organization01:13

Protein Organization

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Protein Organization01:13

Protein Organization

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Related Experiment Video

Updated: Jul 13, 2026

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

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Published on: June 23, 2018

Correlation between the structural stability and aggregation propensity of proteins.

Susan Idicula-Thomas1, Petety V Balaji

  • 1School of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Powai, Mumbai, India.

In Silico Biology
|August 11, 2007
PubMed
Summary

This study reveals that soluble proteins fold faster and have less exposed hydrophobic residues than aggregating proteins. These findings suggest evolutionary pressure against protein aggregation and offer insights for designing less aggregation-prone proteins.

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Area of Science:

  • Biochemistry
  • Structural Biology
  • Computational Biology

Background:

  • Protein aggregation is linked to misfolding and impacts protein function.
  • Protein folding kinetics and structural stability are crucial in preventing aggregation.
  • Secondary structural element stability correlates with folding/unfolding rates.

Purpose of the Study:

  • To computationally analyze structural features of soluble, inclusion body-forming, and amyloidogenic proteins.
  • To identify features associated with protein structural stability and aggregation propensity.
  • To understand the role of folding kinetics and secondary structure in protein aggregation.

Main Methods:

  • In silico analysis of secondary and tertiary protein structures.
  • Evaluation of contact order to assess folding rates.
  • Analysis of exposed hydrophobic residues and secondary structural composition.

Main Results:

  • Soluble proteins exhibit higher folding rates (lower contact order) and fewer exposed hydrophobic residues compared to aggregating proteins.
  • Soluble proteins show a more favorable helix and strand composition.
  • Evolutionary pressure appears to act against protein aggregation.

Conclusions:

  • Protein structural stability positively correlates with solubility.
  • Folding kinetics and secondary structure composition are key determinants of protein aggregation.
  • These insights can guide the design of mutations to reduce protein aggregation propensity.