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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,...
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...
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...

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Related Experiment Video

Updated: May 9, 2026

Computational Prediction of Amino Acid Preferences of Potentially Multispecific Peptide-Binding Domains Involved in Protein-Protein Interactions
06:50

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

Published on: January 26, 2024

Mining the characteristic interaction patterns on protein-protein binding interfaces.

Yan Li1, Zhihai Liu, Li Han

  • 1State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , 345 Lingling Road, Shanghai 200032, People's Republic of China.

Journal of Chemical Information and Modeling
|August 13, 2013
PubMed
Summary
This summary is machine-generated.

Researchers identified characteristic interaction patterns (CIPs) in protein-protein binding interfaces. This method helps predict key "hot spot" residues and links interface patterns to biological functions.

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Last Updated: May 9, 2026

Computational Prediction of Amino Acid Preferences of Potentially Multispecific Peptide-Binding Domains Involved in Protein-Protein Interactions
06:50

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

Published on: January 26, 2024

Identifying Protein-protein Interaction Sites Using Peptide Arrays
07:44

Identifying Protein-protein Interaction Sites Using Peptide Arrays

Published on: November 18, 2014

Genome-wide Protein-protein Interaction Screening by Protein-fragment Complementation Assay (PCA) in Living Cells
08:38

Genome-wide Protein-protein Interaction Screening by Protein-fragment Complementation Assay (PCA) in Living Cells

Published on: March 3, 2015

Area of Science:

  • Biochemistry
  • Structural Biology
  • Bioinformatics

Background:

  • Protein-protein interactions (PPIs) are crucial for biological processes.
  • Understanding PPIs aids in identifying molecular mechanisms and drug targets.
  • Specific residues, known as
  • hot spots
  • are critical at PPI interfaces.

Purpose of the Study:

  • To develop a residue-based method for identifying Characteristic Interaction Patterns (CIPs) at PPI interfaces.
  • To analyze conserved geometrical and chemical properties of these patterns.
  • To evaluate the method's ability to predict hot spot residues and correlate CIPs with biological functions.

Main Methods:

  • Analysis of 1,222 nonredundant PPI interfaces from the Protein Data Bank.
  • Development of a method to cluster four contacting residues into CIPs.
  • Assessment of geometrical and chemical conservation of identified patterns.
  • Validation of CIPs for hot spot residue prediction using test datasets.

Main Results:

  • Identification of favored interaction patterns across diverse PPI interfaces.
  • Successful prediction of hot spot residues with good recall and acceptable precision.
  • Correlation observed between shared CIPs and similar biological functions of protein complexes.

Conclusions:

  • The developed CIP method effectively identifies key residues at PPI interfaces.
  • CIPs serve as indicators of conserved functional roles in protein-protein interactions.
  • This approach enhances the understanding of PPIs and their functional implications.