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Related Concept Videos

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...
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...
Ligand Binding Sites02:40

Ligand Binding Sites

Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
Protein Networks02:26

Protein Networks

An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
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-Drug Binding: Determination Methods01:22

Protein-Drug Binding: Determination Methods

Determining protein-drug binding can be achieved through indirect and direct methods, each providing valuable insights into the interaction between proteins and drugs.
Indirect methods involve isolating the bound drug from its free form in biological samples such as blood, serum, or plasma. These techniques aim to measure the percentage of drugs bound to proteins. Equilibrium dialysis is a commonly used method where the free drug concentration at equilibrium is measured by separating the bound...

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Related Experiment Video

Updated: Jun 2, 2026

Incorporating Target Protein Structure Flexibility and Dynamics in Computational Drug Discovery Using Ensemble-Based Docking Analysis
08:49

Incorporating Target Protein Structure Flexibility and Dynamics in Computational Drug Discovery Using Ensemble-Based Docking Analysis

Published on: June 20, 2025

A collaborative filtering approach for protein-protein docking scoring functions.

Thomas Bourquard1, Julie Bernauer, Jérôme Azé

  • 1Bioinformatics Group, INRIA AMIB, Laboratoire de Recherche en Informatique, Université Paris-Sud, Orsay, France.

Plos One
|April 29, 2011
PubMed
Summary
This summary is machine-generated.

This study introduces a refined protein-protein docking method using collaborative filtering for improved conformation ranking. The new approach successfully identifies near-native protein complex structures in the top-ranked solutions, enhancing interactome exploration.

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Last Updated: Jun 2, 2026

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Area of Science:

  • Computational Biology
  • Structural Bioinformatics
  • Biochemistry

Background:

  • Protein-protein docking aims to predict complex structures computationally.
  • Existing scoring functions struggle to consistently rank near-native conformations within the top solutions for large-scale interactome analysis.
  • Accurate scoring functions are crucial for identifying biologically relevant protein interactions.

Purpose of the Study:

  • To develop an improved protein-protein docking conformation ranking procedure.
  • To enhance the accuracy and reliability of identifying near-native protein complex structures.
  • To facilitate large-scale in silico exploration of the protein interactome.

Main Methods:

  • A novel ranking procedure combining previously developed genetic algorithm-based scoring functions with collaborative filtering classifiers (decision trees, rules, support vector machines).
  • Evaluation using 10-fold cross-validation and comparison against methods using genetic algorithms or collaborative filtering alone.
  • Application to the CAPRI (Critical Assessment of PRedicted Interactions) scoring ensembles.

Main Results:

  • The refined ranking procedure successfully identified near-native conformations within the top 10 ranked solutions for 10 out of 12 targets in the CAPRI dataset.
  • High-accuracy near-native conformations were selected for 6 of these targets.
  • The method significantly enriched near-native structures within the top 100 ranked conformations.

Conclusions:

  • The developed collaborative filtering-based ranking scheme significantly improves protein-protein docking accuracy.
  • This approach offers a more reliable method for identifying biologically relevant protein complexes in computational studies.
  • The enhanced ranking procedure holds promise for advancing large-scale interactome mapping and drug discovery efforts.