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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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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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A Yeast 2-Hybrid Screen in Batch to Compare Protein Interactions
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Mapping Protein-Protein Interaction Using High-Throughput Yeast 2-Hybrid.

Jessica Lopez1, M Shahid Mukhtar2,3

  • 1Department of Biology, University of Alabama at Birmingham, Birmingham, AL, USA.

Methods in Molecular Biology (Clifton, N.J.)
|April 26, 2017
PubMed
Summary

The yeast-2-hybrid (Y2H) method is a powerful in vivo technique for studying protein-protein interactions. This assay is crucial for understanding biological networks and has broad applications in various scientific fields.

Keywords:
High-throughputNetwork biologyProtein-protein interactionsReporter geneSystems biologyYeast-2-hybrid

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Area of Science:

  • Molecular Biology
  • Biochemistry
  • Genetics

Background:

  • Protein-protein interactions are fundamental to cellular processes.
  • The yeast-2-hybrid (Y2H) assay is a widely used method for their investigation.
  • Understanding these interactions is key to network biology.

Purpose of the Study:

  • To provide a comprehensive overview of the yeast-2-hybrid (Y2H) method.
  • To detail the fundamental mechanics and applications of Y2H.
  • To focus on the GAL4-based Y2H system for mapping protein interactions.

Main Methods:

  • The Y2H assay utilizes a genetically engineered yeast strain.
  • It relies on the reconstitution of a transcription factor (GAL4) upon protein interaction.
  • Reporter gene activation indicates a successful interaction.

Main Results:

  • The Y2H system enables in vivo investigation of binary protein-protein interactions.
  • It leverages auxotrophic yeast and the GAL4 transcription factor domains (DNA-binding and activation domains).
  • Successful interaction reconstitutes the transcription factor, activating a reporter gene.

Conclusions:

  • The Y2H method is a versatile tool for identifying protein-protein interactions.
  • Its applications span drug discovery, disease research (cancer, neurodegenerative diseases), synthetic biology, and cellular engineering.
  • This chapter offers a detailed protocol and mechanistic understanding of the Y2H experiment.