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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 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...
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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Related Experiment Video

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

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Interspecies data mining to predict novel ING-protein interactions in human.

Paul M K Gordon1, Mohamed A Soliman, Pinaki Bose

  • 1Department of Biochemistry & Molecular Biology, Faculty of Medicine, University of Calgary, Calgary, Alberta, Canada. gordonp@ucalgary.ca

BMC Genomics
|September 20, 2008
PubMed
Summary

A novel cross-species bioinformatics approach effectively identifies novel protein interactions for Inhibitor of Growth (ING) proteins, linking them to cell stress and DNA repair pathways. This method uncovers previously missed weak interactions, improving our understanding of tumor suppressors.

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

Published on: January 26, 2024

Area of Science:

  • Molecular Biology
  • Genetics
  • Bioinformatics

Background:

  • The Inhibitor of Growth (ING) family (ING1-ING5) are type II tumor suppressors involved in critical cellular processes including aging, apoptosis, DNA repair, and tumorigenesis.
  • Existing large-scale proteomics methods may miss transient or weak protein interactions, limiting our understanding of ING protein partners.
  • A cross-species bioinformatics approach was developed to identify potential human ING-interacting proteins with enhanced accuracy.

Purpose of the Study:

  • To develop and validate a cross-species bioinformatics approach for identifying protein-protein interactions.
  • To discover novel interaction partners of the ING protein family, specifically ING1.
  • To link ING proteins to cellular stress and DNA damage response pathways.

Main Methods:

  • A cross-species bioinformatics strategy integrating yeast, fly, and human data was employed.
  • Potential human ING-interacting proteins were identified computationally.
  • Interactions were validated using traditional laboratory techniques.

Main Results:

  • The bioinformatics approach successfully identified novel ING1-interacting proteins: p38MAPK, MEKK4, and RAD50.
  • These interactions establish a new link between ING proteins and cell stress/DNA damage signaling pathways.
  • The identified interactions were not predicted by conventional protein-protein interaction tools.

Conclusions:

  • The cross-species bioinformatics approach is effective in identifying biologically relevant protein interactions, including those missed by conventional methods.
  • Weak interaction data from large-scale datasets, often underutilized, holds significant value for discovering novel biological insights.
  • This approach enhances our understanding of the functional roles of ING proteins in DNA damage response and tumor suppression.