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Quantification of Protein Interaction Network Dynamics using Multiplexed Co-Immunoprecipitation
Published on: August 21, 2019
Duplicate retention in signalling proteins and constraints from network dynamics.
1Systems Biology Program, College of Engineering, Computing and Mathematics and Physical Sciences, University of Exeter, Exeter, UK. O.S.Soyer@exeter.ac.uk
Journal of Evolutionary Biology
|September 10, 2010
Summary
Gene duplications, especially in signaling networks, can occur neutrally. Receptors are more likely to expand in small populations, suggesting neutral processes shape signaling evolution.
Area of Science:
- Evolutionary biology
- Molecular biology
- Systems biology
Background:
- Gene duplications are a key driver of evolution.
- The fixation of gene duplicates often occurs via genetic drift (neutral evolution).
- It remains unclear if neutral processes affect all gene duplications uniformly or if certain gene families are predisposed to neutral expansion.
Purpose of the Study:
- To analyze the neutrality of gene duplications in different functional classes of signaling proteins.
- To investigate how duplications affect the response dynamics of signaling networks.
- To determine if functional class influences the likelihood of neutral duplication fixation.
Main Methods:
- Analysis of duplication neutrality in signaling proteins.
- Categorization of proteins into functional classes (e.g., receptors, intermediaries).
- Assessment of the impact of duplications on response dynamics.
- Comparison of duplication patterns across different population sizes and selective pressures.
- Examination of the proportion of receptors in eukaryotic versus prokaryotic genomes.
Main Results:
- Duplications of intermediary signaling proteins are more frequently neutral than those of receptor proteins.
- The proportion of neutral duplications increases with decreasing population size and reduced selective pressure on dynamics.
- This effect is most pronounced for receptors, suggesting potential receptor expansion in small populations.
- A significant increase in the relative number of receptors was observed in eukaryotes compared to prokaryotes.
Conclusions:
- Neutral evolutionary processes can significantly shape the structure of signaling networks.
- Different functional classes of signaling proteins may be affected differently by neutral processes.
- The findings suggest that receptor expansion in small populations might be driven by neutral drift.
- Further research is needed to confirm the role of neutral processes in signaling network evolution.
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