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Related Concept Videos

Conserved Binding Sites01:49

Conserved Binding Sites

Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...
Conserved Binding Sites01:49

Conserved Binding Sites

Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...
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...
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.
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.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...
Protein-protein Interfaces02:04

Protein-protein Interfaces

Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a polypeptide...

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Related Experiment Video

Updated: Jun 10, 2026

Optimization of Synthetic Proteins: Identification of Interpositional Dependencies Indicating Structurally and/or Functionally Linked Residues
07:08

Optimization of Synthetic Proteins: Identification of Interpositional Dependencies Indicating Structurally and/or Functionally Linked Residues

Published on: July 14, 2015

Improving predicted protein loop structure ranking using a Pareto-optimality consensus method.

Yaohang Li1, Ionel Rata, See-wing Chiu

  • 1Department of Computer Science, Old Dominion University, Norfolk, VA 23529, USA. yaohang@cs.odu.edu

BMC Structural Biology
|July 21, 2010
PubMed
Summary
This summary is machine-generated.

A new Pareto Optimal Consensus (POC) method effectively ranks protein loop models by integrating multiple scoring functions. This approach significantly reduces false positives in identifying native and near-native protein structures.

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Last Updated: Jun 10, 2026

Optimization of Synthetic Proteins: Identification of Interpositional Dependencies Indicating Structurally and/or Functionally Linked Residues
07:08

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Published on: July 14, 2015

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A Protocol for Computer-Based Protein Structure and Function Prediction
16:41

A Protocol for Computer-Based Protein Structure and Function Prediction

Published on: November 3, 2011

Area of Science:

  • Computational biology
  • Structural bioinformatics
  • Protein structure prediction

Background:

  • Accurate protein loop structure modeling is crucial for understanding protein functions.
  • Distinguishing native or near-native models from misfolded ones is a key challenge in protein loop structure prediction.

Purpose of the Study:

  • To develop and evaluate a novel consensus model ranking approach for protein loop structure prediction.
  • To improve the accuracy of identifying high-quality protein loop models.

Main Methods:

  • Developed the Pareto Optimal Consensus (POC) method, a consensus model ranking approach.
  • Integrated multiple knowledge- and physics-based scoring functions (Rosetta, DOPE, DDFIRE, OPLS-AA, triplet backbone dihedral potential).
  • Applied the POC method to decoy sets for protein loops of varying lengths (4-12 residues).

Main Results:

  • The POC method identified Pareto-optimal decoys, covering best/near-best models in over 99% of loop targets.
  • POC yielded significant reductions in false positives: 23% for native conformation, 37% for top-ranked near-native models, and 64% for top-5 near-native models.
  • POC outperformed other consensus strategies (rank-by-number, rank-by-rank, rank-by-vote, regression-based methods).

Conclusions:

  • The POC method effectively integrates multiple scoring functions using Pareto optimality and fuzzy dominance.
  • This approach enhances the ability to distinguish the best protein loop models within a set.