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Parasites lead to evolution of robustness against gene loss in host signaling networks
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Salathé, Marcel and Soyer, Orkun S. (2008) Parasites lead to evolution of robustness against gene loss in host signaling networks. Molecular Systems Biology, Volume 4 . Article no. 202. doi:10.1038/msb.2008.44 ISSN 1744-4292.
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Official URL: http://dx.doi.org/10.1038/msb.2008.44
Abstract
Many biological networks can maintain their function against single gene loss. However, the evolutionary mechanisms responsible for such robustness remain unclear. Here, we demonstrate that antagonistic host–parasite interactions can act as a selective pressure driving the emergence of robustness against gene loss. Using a model of host signaling networks and simulating their coevolution with parasites that interfere with network function, we find that networks evolve both redundancy and specific architectures that allow them to maintain their response despite removal of proteins. We show that when the parasite pressure is removed, subsequent evolution can lead to loss of redundancy while architecture-based robustness is retained. Contrary to intuition, increased parasite virulence hampers evolution of robustness by limiting the generation of population level diversity in the host. However, when robustness emerges under high virulence, it tends to be stronger. These findings predict an increased presence of robustness mechanisms in biological networks operating under parasite interference. Conversely, the presence of such mechanisms could indicate current or past parasite interference.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QR Microbiology | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | ||||
Library of Congress Subject Headings (LCSH): | Host-parasite relationships -- Genetic aspects, Coevolution, Cellular signal transduction | ||||
Journal or Publication Title: | Molecular Systems Biology | ||||
Publisher: | Nature Publishing Group | ||||
ISSN: | 1744-4292 | ||||
Official Date: | 2008 | ||||
Dates: |
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Volume: | Volume 4 | ||||
Page Range: | Article no. 202 | ||||
DOI: | 10.1038/msb.2008.44 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Open Access (Creative Commons) | ||||
Date of first compliant deposit: | 24 December 2015 | ||||
Date of first compliant Open Access: | 24 December 2015 | ||||
Funder: | Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung [Swiss National Science Foundation] (SNSF), Italy. Ministero dell'istruzione, dell'università e della ricerca (MIUR) |
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