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Related Concept Videos

Protein-protein Interfaces02:04

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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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Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.
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Proteins undergo chemical modifications that trigger changes in the charge, structure, and conformation of the proteins. Phosphorylation, acetylation, glycosylation, nitrosylation, ubiquitination, lipidation, methylation, and proteolysis are various protein modifications that regulate protein activity. Such modifications are usually enzyme-driven.
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Protein domains are small structurally independent units that are part of a single amino acid chain.  Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
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Updated: Feb 13, 2026

Visualizing Subcellular Localization of a Protein in the Heart Using Quantum Dots-Mediated Immuno-Labeling Followed by Transmission Electron Microscopy
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CellMap visualizes protein-protein interactions and subcellular localization.

Christian Dallago1, Tatyana Goldberg1,2, Miguel Angel Andrade-Navarro3

  • 1Department of Informatics, Bioinformatics & Computational Biology , TUM (Technical University of Munich), Munich, Germany.

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|March 6, 2018
PubMed
Summary
This summary is machine-generated.

CellMap visualizes protein-protein interactions (PPI) within specific cellular locations. This novel tool integrates PPI data with subcellular localization for enhanced biological network analysis.

Keywords:
biological visualizationprotein-protein interactionsubcellular location

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Area of Science:

  • Cell Biology
  • Bioinformatics
  • Computational Biology

Background:

  • Protein-protein interaction (PPI) networks are crucial for understanding cellular functions.
  • Existing visualization tools often lack context regarding the subcellular location of these interactions.
  • Understanding where PPIs occur is key to deciphering their biological roles.

Purpose of the Study:

  • To introduce CellMap, a novel tool for visualizing protein-protein interaction networks.
  • To integrate PPI data with subcellular localization information for contextualized visualization.
  • To provide a customizable and extensible platform for researchers studying cellular networks.

Main Methods:

  • CellMap visualizes PPI networks by mapping them to subcellular locations.
  • Users can upload cell images and define regions of interest for focused analysis.
  • PPI data is displayed within these regions, with localization annotations from user input or a database.
  • The tool is developed using JavaScript for the visualizer and server.

Main Results:

  • CellMap enables the visualization of PPIs within specific cellular compartments.
  • The tool allows users to integrate their own localization data or use an existing database.
  • It provides a default visualization on a cartoon cell, which can be customized.
  • The JavaScript implementation facilitates easy customization and extension.

Conclusions:

  • CellMap offers a novel approach to visualizing protein-protein interactions in a subcellular context.
  • This tool enhances the understanding of PPIs by considering their spatial localization.
  • CellMap is a flexible and extendable platform for biological network visualization and research.