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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...
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...
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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Global Identification of Co-Translational Interaction Networks by Selective Ribosome Profiling
06:58

Global Identification of Co-Translational Interaction Networks by Selective Ribosome Profiling

Published on: October 7, 2021

An overlapping module identification method in protein-protein interaction networks.

Xuesong Wang1, Lijing Li, Yuhu Cheng

  • 1School of Information and Electrical Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, PR China. wangxuesongcumt@163.com

BMC Bioinformatics
|May 19, 2012
PubMed
Summary
This summary is machine-generated.

We developed a novel overlapping module identification method (OMIM) for protein-protein interaction (PPI) networks. OMIM effectively identifies complex modular structures, outperforming existing methods in large-scale PPI network analysis.

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Last Updated: May 22, 2026

Global Identification of Co-Translational Interaction Networks by Selective Ribosome Profiling
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Published on: August 21, 2019

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07:44

Identifying Protein-protein Interaction Sites Using Peptide Arrays

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Area of Science:

  • Bioinformatics
  • Systems Biology
  • Network Science

Background:

  • Protein-protein interaction (PPI) networks exhibit modular structures.
  • Identifying modules in PPI networks is crucial for genome and metagenome investigations.
  • Existing methods struggle with overlapping modular structures in PPI networks.

Purpose of the Study:

  • To introduce a novel method for identifying overlapping modules in PPI networks.
  • To address limitations of current methods in handling complex network structures.
  • To provide an efficient tool for large-scale PPI network analysis.

Main Methods:

  • An agglomerative clustering approach merging modules based on modularity contributions.
  • Definition of overlapping nodes as those impacting multiple modules.
  • Inclusion of de-noising steps using clustering coefficients and hub-finding based on nodal weights.

Main Results:

  • The method, OMIM, was validated on artificial and real PPI networks.
  • OMIM demonstrated superior performance in identifying high-quality modular structures.
  • The approach effectively handles overlapping modules in complex networks.

Conclusions:

  • OMIM offers low computational complexity and requires few parameters, making it suitable for large-scale analysis.
  • The method successfully identifies overlapping modules in biological networks.
  • OMIM outperforms established methods for modular structure identification in PPI networks.