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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 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...
Genome-wide Association Studies-GWAS01:11

Genome-wide Association Studies-GWAS

Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
GWAS does not require the identification of the target gene involved in...

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Mapping Dysfunctional Protein-Protein Interactions in Disease
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Mapping Dysfunctional Protein-Protein Interactions in Disease

Published on: October 24, 2025

The expanded human disease network combining protein-protein interaction information.

Xuehong Zhang1, Ruijie Zhang, Yongshuai Jiang

  • 1College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China.

European Journal of Human Genetics : EJHG
|March 10, 2011
PubMed
Summary

We created an expanded human disease network (eHDN) integrating protein-protein interactions to reveal new disease associations. This network enhances understanding of complex diseases and their genetic underpinnings.

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Area of Science:

  • Computational biology
  • Systems biology
  • Genetics

Background:

  • The human disease network (HDN) is crucial for understanding disease associations.
  • Genes with similar disease phenotypes often encode interacting proteins.
  • Protein-protein interactions (PPIs) can elucidate relationships between diseases with overlapping phenotypes.

Purpose of the Study:

  • To construct an expanded HDN (eHDN) by integrating disease gene and PPI information.
  • To analyze the topological and functional properties of the eHDN.
  • To identify novel disease associations and validate the eHDN's reliability.

Main Methods:

  • Construction of the eHDN by combining disease gene data with PPI data.
  • Analysis of network topology, including disease connectivity and clustering.
  • Evaluation of functional properties and comparison with the original HDN (oHDN).

Main Results:

  • The eHDN exhibits a hierarchical structure with some diseases being highly connected.
  • Diseases within specific classes cluster together, and genes for the same disease show functional relatedness.
  • The eHDN showed high consistency with the oHDN, indicating reliability and revealing new disease associations.

Conclusions:

  • The integrated eHDN provides a reliable framework for understanding disease relationships.
  • The study identified novel disease associations through shared interacting genes.
  • The eHDN serves as a valuable resource for clinicians and researchers in medical science.