Related Experiment Video
Updated: Jun 12, 2026
08:07
Probing High-density Functional Protein Microarrays to Detect Protein-protein Interactions
Published on: August 2, 2015
Why do essential proteins tend to be clustered in the yeast interactome network?
Chenqi Lu1, Xiaohua Hu, Guiying Wang
1Laboratory of Population & Quantitative Genetics, Institute of Biostatistics, SKLGE, School of Life Sciences, Fudan University, Shanghai 200433, China.
Molecular Biosystems
|June 23, 2010
Summary
Essential proteins interact due to protein complexes and network modules, not just connectivity. This explains why essential proteins cluster together in the yeast interactome network.
Area of Science:
- Systems Biology
- Network Biology
- Proteomics
Background:
- The centrality-lethality rule, linking protein connectivity to essentiality, is challenged by new yeast interactome data.
- The reason for essential proteins interacting preferentially remains unclear.
Purpose of the Study:
- Investigate the reasons behind the clustering of essential proteins in the yeast interactome.
- Determine the contribution of protein complexes and network modules to essential protein interactions.
Main Methods:
- Analysis of high-throughput yeast two-hybrid (Y2H) data.
- Examination of protein complexes and their subunit deletion phenotypes.
- Network modularity analysis and protein essentiality variation.
Main Results:
- 67-75% of excessive interactions between essential proteins (IBEPs) are linked to protein complexes with shared deletion phenotypes.
- 20-78% of IBEPs are explained by network modularity and varying protein essentiality across modules.
Conclusions:
- Protein complexes and network modularity are key drivers of essential protein clustering.
- The local structure of protein complexes, acting as functional and structural modules, explains essential protein co-interaction.
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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,...
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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,...
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