Scaling properties of protein family phylogenies

Details Scaling properties of protein family phylogenies Scaling properties of protein family phylogenies

2011-02-22

arxiv.org/abs/1102.4540v3

BMC Evolutionary Biology 11, 155 (2011)

Biology

Quantitative Biology

Populations and Evolution

Replaced with final published version

Scientific paper

10.1186/1471-2148-11-155

One of the classical questions in evolutionary biology is how evolutionary processes are coupled at the gene and species level. With this motivation, we compare the topological properties (mainly the depth scaling, as a characterization of balance) of a large set of protein phylogenies with a set of species phylogenies. The comparative analysis shows that both sets of phylogenies share remarkably similar scaling behavior, suggesting the universality of branching rules and of the evolutionary processes that drive biological diversification from gene to species level. In order to explain such generality, we propose a simple model which allows us to estimate the proportion of evolvability/robustness needed to approximate the scaling behavior observed in the phylogenies, highlighting the relevance of the robustness of a biological system (species or protein) in the scaling properties of the phylogenetic trees. Thus, the rules that govern the incapability of a biological system to diversify are equally relevant both at the gene and at the species level.

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