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Related Concept Videos

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,...
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...
Proteomics01:33

Proteomics

A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term proteomics...

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Finding protein-protein interaction patterns by contact map matching.

R C Melo1, C Ribeiro, C S Murray

  • 1Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil. raquelcm@gmail.com

Genetics and Molecular Research : GMR
|December 7, 2007
PubMed
Summary

We developed a new method using image processing to analyze protein-protein interactions. This approach identifies conserved contact patterns in protein complexes, revealing key interactions within serine proteases.

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Area of Science:

  • Structural Biology
  • Bioinformatics
  • Computational Biology

Background:

  • Protein-protein interactions are crucial for biological functions.
  • Traditional contact maps primarily represent intra-chain contacts.
  • Analyzing inter-chain contacts in protein complexes requires novel methodologies.

Purpose of the Study:

  • To introduce a novel method for defining contact patterns in protein-protein complexes.
  • To adapt contact map analysis for inter-chain interactions.
  • To identify conserved interaction patterns at protein interfaces.

Main Methods:

  • Utilizing an image processing-based algorithm to analyze protein-protein interaction maps.
  • Comparing interaction maps to derive a dissimilarity score.
  • Aligning contacts across multiple complexes to detect conserved patterns.

Main Results:

  • Identified 20 conserved contacts in trypsin and chymotrypsin complexes.
  • Discovered 3 specific contacts conserved across all studied serine protease complexes.
  • The method successfully pinpointed significant contacts within the serine protease family.

Conclusions:

  • The novel method effectively analyzes inter-chain contacts in protein complexes.
  • This approach aids in identifying conserved interaction patterns and key residues.
  • Results align with existing literature, validating the method's utility.