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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...
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 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 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,...

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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

PresCont: predicting protein-protein interfaces utilizing four residue properties.

Hermann Zellner1, Martin Staudigel, Thomas Trenner

  • 1Institute of Biophysics and Physical Biochemistry, University of Regensburg, Regensburg, Germany.

Proteins
|November 1, 2011
PubMed
Summary

PresCont robustly predicts amino acids at protein-protein interfaces (PPIs) using four residue properties. This computational biology tool achieves state-of-the-art accuracy, outperforming existing methods for diverse protein complexes.

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A Protocol for Computer-Based Protein Structure and Function Prediction
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A Protocol for Computer-Based Protein Structure and Function Prediction

Published on: November 3, 2011

Area of Science:

  • Computational biology
  • Structural bioinformatics
  • Protein interactions

Background:

  • Identifying protein-protein interfaces (PPIs) is crucial for understanding cellular functions.
  • Existing computational methods for PPI prediction have varying performance across different complex types.

Purpose of the Study:

  • To develop a robust computational tool, PresCont, for predicting amino acids involved in protein-protein interactions.
  • To achieve state-of-the-art prediction quality using readily available protein structural and evolutionary data.

Main Methods:

  • PresCont utilizes a support vector machine (SVM) trained on four key residue properties: solvent-accessible surface area, hydrophobicity, conservation, and local environment.
  • The program integrates information from a protein's 3D structure and a multiple sequence alignment (MSA) of homologs.
  • Performance was evaluated on three distinct datasets comprising permanent and transient protein complexes.

Main Results:

  • PresCont demonstrates robust and state-of-the-art classification quality in predicting protein-protein interface residues.
  • The prediction accuracy is less dependent on the type of protein complex (permanent vs. transient) compared to other methods.
  • Individual residue properties contribute differently to prediction accuracy based on complex type, with solvent accessibility and hydrophobicity key for permanent complexes, and local environment crucial for transient ones.

Conclusions:

  • PresCont offers a reliable and versatile tool for identifying protein-protein interaction sites in computational biology.
  • The program's balanced performance across different complex types makes it a valuable asset for researchers.
  • PresCont is accessible as a web service, facilitating its application in biological research.