Studying Protein Interaction Networks in Yeast
Author Information
Author(s): Lee Wei-Po, Jeng Bing-Chiang, Pai Tun-Wen, Tsai Chin-Pei, Yu Chang-Yung, Tzou Wen-Shyong
Primary Institution: National University of Kaohsiung
Hypothesis
Motif modes may represent the evolutionary-conserved topological units of a protein interaction network.
Conclusion
This study reveals that different motifs of the same topology have varying evolutionary constraints, suggesting new ways to analyze protein interaction networks.
Supporting Evidence
- The study identified nearly 1.3 and 1.7 million motif modes using Gene Ontology terms at depths five and six.
- A power-law distribution of motif counts was found for all motif modes.
- The conservation ratio varied significantly among motif modes of the same topology.
Takeaway
The researchers looked at how proteins interact in yeast and found that some patterns of interaction are more stable over time than others.
Methodology
The study used a new algorithm to categorize network motifs into 'motif modes' based on the topology of Gene Ontology terms annotated for motif nodes.
Limitations
The reliability of annotation transfers between organisms depends on the level of sequence identity, which may affect the results.
Participant Demographics
The study focused on the protein interaction network of Saccharomyces cerevisiae.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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