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Related Concept Videos

Protein Networks02:26

Protein Networks

4.6K
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,...
4.6K
Protein Networks02:26

Protein Networks

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2.9K
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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Protein-Protein Interfaces02:04

Protein-Protein Interfaces

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Ligand Binding Sites02:40

Ligand Binding Sites

15.4K
Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
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Genome-wide Protein-protein Interaction Screening by Protein-fragment Complementation Assay PCA in Living Cells
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A Brief Progress in Methods for Deciphering Protein-Protein Interaction Networks.

Xiaohan Yang1,2, Wenming Cui1,2, Liefeng Wang1,3

  • 1Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases (Ministry of Education), Gannan Medical University, 1 Hexie Road, Rongjiang New District, Ganzhou 341000, China.

International Journal of Molecular Sciences
|February 27, 2026
PubMed
Summary
This summary is machine-generated.

This review details methods for mapping protein-protein interactions (PPIs), crucial for understanding cellular functions and diseases. It covers foundational and advanced techniques to capture dynamic PPIs in vivo, aiding therapeutic target discovery.

Keywords:
chemical cross-linking mass spectrometryco-immunoprecipitationfluorescence resonance energy transferprotein–protein interactionsproximity ligation assay

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Area of Science:

  • Molecular Biology
  • Biochemistry
  • Cell Biology

Background:

  • Protein-protein interactions (PPIs) are vital for cellular processes and disease development.
  • Systematic interactome mapping is key for identifying therapeutic targets and advancing drug design.
  • Capturing the spatiotemporal regulation of PPIs in vivo is a major research focus.

Purpose of the Study:

  • To review the methodological advancements in mapping protein-protein interactions in vivo.
  • To provide a comparative analysis of first- and second-generation PPI mapping techniques.
  • To offer a framework for selecting appropriate methods and discuss future frontiers in interactomics.

Main Methods:

  • First-generation methods: yeast two-hybrid and co-immunoprecipitation for binary interaction mapping and static networks.
  • Second-generation methods: proximity-dependent labeling and advanced imaging for capturing dynamic PPIs in native cellular contexts.
  • Integration with mass spectrometry for enhanced interactome analysis.

Main Results:

  • Foundational techniques established frameworks for interaction mapping.
  • Advanced methods enable the capture of PPIs within dynamic cellular environments.
  • Comparative analysis highlights strengths and limitations of various techniques.

Conclusions:

  • Methodological innovations have revolutionized PPI mapping.
  • Emerging frontiers like spatial proteomics and single-cell interactomics promise deeper insights.
  • This review serves as a guide for researchers utilizing interactome data.