We highlight new evolutionary insights enabled by recent genome-wide studies on protein-protein interaction (PPI) networks ('interactomes'). While most PPIs are mediated by a single sequence region promoting or inhibiting interactions, many PPIs are mediated by multiple sequence regions acting cooperatively. Most PPIs perform important functions maintained by negative selection: we estimate that less than ∼10% of the human interactome is effectively neutral upon perturbation (i.e. 'junk' PPIs), and the rest are deleterious upon perturbation; interfacial sites evolve more slowly than other sites; many conserved PPIs show signatures of co-evolution at the interface; PPIs evolve more slowly than protein sequence. At the same time, many PPIs undergo rewiring during evolution for lineage-specific adaptation. Finally, chaperone-protein and host-pathogen interactomes are governed by distinct evolutionary principles.
Interactome evolution: insights from genome-wide analyses of protein-protein interactions.
Mohamed A. Ghadie,J. Coulombe-Huntington,Yu Xia
Published 2018 in Current Opinion in Structural Biology
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- Publication year
2018
- Venue
Current Opinion in Structural Biology
- Publication date
2018-06-01
- Fields of study
Biology, Medicine
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Semantic Scholar, PubMed
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