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Updated: Jul 14, 2026
08:38
Genome-wide Protein-protein Interaction Screening by Protein-fragment Complementation Assay (PCA) in Living Cells
Published on: March 3, 2015
Systematic functional assessment of human protein-protein interaction maps
Gautam Chaurasia1, Hanspeter Herzel, Erich E Wanker
1Institute for Theoretical Biology, Humboldt-Universität, Berlin, Germany. g.chaurasia@biologie.hu-berlin.de
Summary
Large-scale human protein-protein interaction maps reveal common proteins but few shared interactions. Functional assessment identified biases crucial for interpreting these valuable cell biology resources.
Area of Science:
- Molecular Biology
- Systems Biology
- Bioinformatics
Background:
- Protein-protein interaction (PPI) maps are essential for understanding cellular cooperation.
- Recent advancements have yielded numerous large-scale human PPI maps from experimental and computational methods.
- Evaluating these maps is critical for advancing human biology research.
Purpose of the Study:
- To conduct the first systematic functional assessment of eight major human PPI maps.
- To analyze the overlap and divergence of interactions within these maps.
- To identify biases influencing the interpretation and application of PPI data.
Main Methods:
- Systematic functional assessment of eight human PPI maps.
- Comparative analysis of common proteins and interactions across maps.
- Identification and characterization of biases within the datasets.
Main Results:
- The analyzed human PPI maps share a significant number of proteins.
- There is a low degree of overlap in the specific protein-protein interactions reported across maps.
- Several types of systematic biases were detected in the datasets.
Conclusions:
- Human PPI maps, while containing common protein players, exhibit considerable divergence in interaction data.
- Understanding and accounting for identified biases are essential for accurate utilization of these maps.
- Further refinement of PPI mapping strategies is needed to improve map consistency and reliability.
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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,...
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,...
02:26Protein 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,...
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,...
02:04Protein-protein Interfaces
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02:04Protein-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...
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Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term proteomics...
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The primary structure of a protein is its amino acid sequence.
The primary structure of a protein is its amino acid sequence.