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Evolution of protein-protein interaction networks in yeast

PLoS ONE, ISSN: 1932-6203, Vol: 12, Issue: 3, Page: e0171920
2017
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Article Description

Interest in the evolution of protein-protein and genetic interaction networks has been rising in recent years, but the lack of large-scale high quality comparative datasets has acted as a barrier. Here, we carried out a comparative analysis of computationally predicted proteinprotein interaction (PPI) networks from five closely related yeast species. We used the Protein-protein Interaction Prediction Engine (PIPE), which uses a database of known interactions to make sequence-based PPI predictions, to generate high quality predicted interactomes. Simulated proteomes and corresponding PPI networks were used to provide null expectations for the extent and nature of PPI network evolution. We found strong evidence for conservation of PPIs, with lower than expected levels of change in PPIs for about a quarter of the proteome. Furthermore, we found that changes in predicted PPI networks are poorly predicted by sequence divergence. Our analyses identified a number of functional classes experiencing fewer PPI changes than expected, suggestive of purifying selection on PPIs. Our results demonstrate the added benefit of considering predicted PPI networks when studying the evolution of closely related organisms.

Bibliographic Details

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Andrew Schoenrock; Daniel Burnside; Houman Moteshareie; Sylvain Pitre; Mohsen Hooshyar; James R. Green; Ashkan Golshani; Frank Dehne; Alex Wong; Franca Fraternali

Public Library of Science (PLoS)

Multidisciplinary

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