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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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Conservation of Protein Domains Over Different Proteins02:26

Conservation of Protein Domains Over Different Proteins

Protein domains are small structurally independent units that are part of a single amino acid chain.  Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
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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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Protein WISDOM: A Workbench for In silico De novo Design of BioMolecules
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Differentiation between two-state and multi-state folding proteins based on sequence.

Ji-Tao Huang1, Jin-Pei Cheng

  • 1State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.

Proteins
|January 12, 2008
PubMed
Summary
This summary is machine-generated.

Protein folding kinetics differ between two-state and multi-state pathways. Chain length over 112 residues predicts multi-state folding, while amino acid volume influences folding speed.

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Area of Science:

  • Biochemistry
  • Computational Biology
  • Protein Dynamics

Background:

  • Protein folding kinetics are crucial for function and can follow two-state or multi-state pathways.
  • Distinguishing between these pathways is essential for predicting protein folding rates accurately.

Purpose of the Study:

  • To develop computational methods for discriminating between two-state and multi-state protein folding kinetics.
  • To identify key features, such as chain length and amino acid composition, that predict protein folding pathways.

Main Methods:

  • Logistic regression and support vector machine algorithms were employed.
  • Analysis focused on protein chain length and amino acid composition data.

Main Results:

  • Protein chain length was found to be a sufficient predictor for multi-state folding, with a transition boundary at 112 residues.
  • Amino acid volume generally correlates with folding kinetics: smaller amino acids favor two-state folding, larger ones favor multi-state folding.
  • Specific amino acids (cysteine, alanine, arginine, lysine, histidine, methionine) showed deviations from the general amino acid volume rule.

Conclusions:

  • Chain length serves as a reliable indicator for classifying protein folding kinetics.
  • Amino acid composition, particularly volume, provides insights into folding pathways, though exceptions exist.
  • These findings contribute to a better understanding of protein folding mechanisms and prediction models.