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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
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 Folding Quality Check in the RER01:29

Protein Folding Quality Check in the RER

ER is the primary site for the maturation and folding of soluble and transmembrane secretory proteins. The calnexin cycle is a specific chaperone system that folds and assesses the confirmation of N-glycosylated proteins before they can exit the ER lumen. The primary players of this quality check pipeline are the lectins, ER-resident chaperones, and a glucosyl transferase enzyme. In case the calnexin system in the lumen fails to salvage a misfolded protein, it is transported to the cytoplasm...

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Related Experiment Video

Updated: May 10, 2026

Fully Autonomous Characterization and Data Collection from Crystals of Biological Macromolecules
07:11

Fully Autonomous Characterization and Data Collection from Crystals of Biological Macromolecules

Published on: March 22, 2019

GalaxyRefine: Protein structure refinement driven by side-chain repacking.

Lim Heo1, Hahnbeom Park, Chaok Seok

  • 1Department of Chemistry, Seoul National University, Seoul 151-747, Korea.

Nucleic Acids Research
|June 6, 2013
PubMed
Summary
This summary is machine-generated.

GalaxyRefine improves protein structure prediction accuracy by rebuilding side chains and using molecular dynamics simulations. This method enhances both local and global structure quality for models generated by leading prediction servers.

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Area of Science:

  • Structural biology
  • Computational biology
  • Biophysics

Background:

  • Protein structure prediction accuracy is limited by template similarity.
  • Improving models beyond template information is crucial for structure prediction.
  • Existing methods struggle to enhance local structure quality effectively.

Purpose of the Study:

  • To present GalaxyRefine, a web server for refining protein structure models.
  • To demonstrate the effectiveness of GalaxyRefine in improving model quality.
  • To provide an accessible tool for enhancing protein structure prediction.

Main Methods:

  • GalaxyRefine rebuilds side chains and performs side-chain repacking.
  • Molecular dynamics simulations are used for overall structure relaxation.
  • The refinement method was validated in the Critical Assessment of protein Structure Prediction (CASP10).

Main Results:

  • GalaxyRefine demonstrated superior performance in improving local structure quality at CASP10.
  • The method significantly enhances both global and local structure quality on average.
  • Refinement of models from state-of-the-art servers yields improved accuracy.

Conclusions:

  • GalaxyRefine effectively improves protein model structures beyond initial predictions.
  • The web server offers a valuable resource for the protein structure prediction community.
  • This approach advances the accuracy of computational protein structure modeling.