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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...
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,...
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 Complexes with Interchangeable Parts01:57

Protein Complexes with Interchangeable Parts

Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...

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Related Experiment Video

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Investigating Protein Sequence-structure-dynamics Relationships with Bio3D-web
09:51

Investigating Protein Sequence-structure-dynamics Relationships with Bio3D-web

Published on: July 16, 2017

Local network patterns in protein-protein interfaces.

Qiang Luo1, Rebecca Hamer, Gesine Reinert

  • 1Department of Management, College of Information Systems and Management, National University of Defense Technology, Changsha, Hunan, PR China. mrqiangluo@gmail.com

Plos One
|March 23, 2013
PubMed
Summary
This summary is machine-generated.

Investigating protein-protein interfaces as contact networks reveals preferred chemical patterns among residues. This finding aids in understanding binding constraints and developing accurate interface prediction methods like iScore.

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Related Experiment Videos

Last Updated: May 13, 2026

Investigating Protein Sequence-structure-dynamics Relationships with Bio3D-web
09:51

Investigating Protein Sequence-structure-dynamics Relationships with Bio3D-web

Published on: July 16, 2017

Computational Prediction of Amino Acid Preferences of Potentially Multispecific Peptide-Binding Domains Involved in Protein-Protein Interactions
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Computational Prediction of Amino Acid Preferences of Potentially Multispecific Peptide-Binding Domains Involved in Protein-Protein Interactions

Published on: January 26, 2024

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

Area of Science:

  • Structural biology
  • Computational biology
  • Biochemistry

Background:

  • Protein-protein interactions are crucial for biological processes.
  • Understanding protein-protein interfaces is key to deciphering these interactions.
  • Current methods often focus on pairwise contacts, potentially missing complex network information.

Purpose of the Study:

  • To investigate local interaction network patterns within protein-protein interfaces.
  • To identify preferred chemical patterns of residues at these interfaces.
  • To develop a novel method for assessing protein-protein interface predictions.

Main Methods:

  • Defined protein-protein interfaces as contact networks of surface residues.
  • Labeled sub-graphs within these networks by amino acid types.
  • Compared observed residue sub-graph distributions with background distributions.
  • Developed an interface prediction assessment signature method called iScore.

Main Results:

  • Identified non-random, preferred chemical patterns of closely packed residues at interfaces.
  • Demonstrated that interfaces contain information beyond simple pairs and triangles.
  • The iScore method achieved 83.6% specificity and 82% sensitivity on tested datasets.

Conclusions:

  • Protein-protein interfaces exhibit specific, non-random network patterns.
  • These patterns reflect biological constraints on residue proximity during binding.
  • The iScore method shows promise for improving the accuracy of protein-protein interface predictions.