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Related Concept Videos

Protein Networks02:26

Protein Networks

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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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Protein-protein Interfaces02:04

Protein-protein Interfaces

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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...
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Related Experiment Video

Updated: Jun 22, 2025

Identifying Protein-protein Interaction in Drosophila Adult Heads by Tandem Affinity Purification TAP
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Next-generation Drosophila protein interactome map and its functional implications.

Guruharsha Bhat1, Kejie Li2, George Locke3

  • 1Department of Cell Biology, Harvard Medical School, Boston, MA, USA; Biogen, 225 Binney St, Cambridge, MA 02142, USA.

Developmental Cell
|June 29, 2024
PubMed
Summary

The Drosophila Protein Interaction Map 2 (DPIM2) provides a comprehensive map of protein interactions in Drosophila, revealing new functional modules and conserved pathways. This resource aids in understanding gene function and predicting protein relationships across species.

Keywords:
affinity purificationinteractomeinterologsmodifiersnotch pathwayprotein interactionproteome

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Area of Science:

  • * Molecular Biology
  • * Systems Biology
  • * Genomics

Background:

  • * Understanding protein interactions is crucial for deciphering cellular mechanisms.
  • * Previous protein interaction maps have limitations in coverage and scope.
  • * Drosophila melanogaster serves as a powerful model organism for studying fundamental biological processes.

Purpose of the Study:

  • * To establish a next-generation Drosophila protein interaction map (DPIM2).
  • * To expand the known interactome of Drosophila and identify functional modules.
  • * To enable cross-species comparisons of protein interaction networks.

Main Methods:

  • * Affinity purification-mass spectrometry (AP-MS) was employed.
  • * 5,805 baits were used to cover a significant portion of the Drosophila proteome.
  • * Network analysis was performed to identify clusters and functional modules.

Main Results:

  • * DPIM2 comprises 32,668 interactions among 3,644 proteins, organized into 632 clusters.
  • * The map expands known interactions, annotates poorly studied genes, and suggests novel relationships.
  • * Analysis of the Notch signaling pathway revealed new modifiers and conserved interactions.

Conclusions:

  • * DPIM2 is a valuable resource for predicting protein co-complex memberships and functional associations.
  • * The map generates functional hypotheses and aids in understanding conserved biological pathways.
  • * DPIM2 facilitates direct comparisons with human protein interaction networks, highlighting conserved functional interactions.