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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
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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Related Experiment Video

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Interview: Protein Folding and Studies of Neurodegenerative Diseases
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Is the protein folding an aim-oriented process? Human haemoglobin as example.

Michal Brylinski1, Leszek Konieczny, Irena Roterman

  • 1Department of Bioinformatics and Telemedicine, Collegium Medicum, Jagiellonian University, Kopernika 17, 31-501 Krakow, Poland. mybrylin@cyf-kr.edu.pl

International Journal of Bioinformatics Research and Applications
|December 1, 2007
PubMed
Summary
This summary is machine-generated.

This study introduces a novel in silico protein folding model. The simulation showed that haem presence guides protein folding towards a functional structure, improving crystal structure similarity.

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Area of Science:

  • Computational biology
  • Biophysics
  • Structural biology

Background:

  • Protein folding is crucial for biological function.
  • Accurate in silico modeling of protein folding remains a challenge.
  • Understanding folding mechanisms aids in drug design and protein engineering.

Purpose of the Study:

  • To present a novel computational model for protein folding simulation.
  • To investigate the influence of ligand presence on protein folding pathways.
  • To validate the model using hemoglobin folding.

Main Methods:

  • Implemented a three-step in silico folding model: backbone conformation, hydrophobic collapse (fuzzy-oil-drop model), and ligand-directed modification.
  • Simulated folding of alpha and beta hemoglobin chains.
  • Compared folding outcomes with and without the presence of haem.

Main Results:

  • The in silico model successfully simulated protein folding.
  • Haem presence significantly influenced the folding process.
  • Simulations with haem yielded structures more closely resembling experimental crystal structures.

Conclusions:

  • The proposed model effectively simulates protein folding.
  • Ligand participation, specifically haem, directs protein folding towards functional conformations.
  • This approach offers insights into ligand-mediated protein structure determination.