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Published on: June 6, 2018
Generalized gene adjacencies, graph bandwidth, and clusters in yeast evolution
Qian Zhu1, Zaky Adam, Vicky Choi
1Department of Biochemistry, University of Ottawa, Ottawa, ON, Canada. qzhu012@uottawa.ca
Abstract:
We present a parameterized definition of gene clusters that allows us to control the emphasis placed on conserved order within a cluster. Though motivated by biological rather than mathematical considerations, this parameter turns out to be closely related to the bandwidth parameter of a graph. Our focus will be on how this parameter affects the characteristics of clusters: how numerous they are, how large they are, how rearranged they are, and to what extent they are preserved from ancestor to descendant in a phylogenetic tree. We infer the latter property by dynamic programming optimization of the presence of individual edges at the ancestral nodes of the phylogeny. We apply our analysis to a set of genomes drawn from the Yeast Gene Order Browser.
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