Knockouts, Robustness and Cell Cycles

Details Knockouts, Robustness and Cell Cycles Knockouts, Robustness and Cell Cycles

2010-02-27

arxiv.org/abs/1003.0104v1

Biology

Quantitative Biology

Molecular Networks

11 pages, 3 figures, 3 tables

Scientific paper

The response to a knockout of a node is a characteristic feature of a networked dynamical system. Knockout resilience in the dynamics of the remaining nodes is a sign of robustness. Here we study the effect of knockouts for binary state sequences and their implementations in terms of Boolean threshold networks. Beside random sequences with biologically plausible constraints, we analyze the cell cycle sequence of the species Saccharomyces cerevisiae and the Boolean networks implementing it. Comparing with an appropriate null model we do not find evidence that the yeast wildtype network is optimized for high knockout resilience. Our notion of knockout resilience weakly correlates with the size of the basin of attraction, which has also been considered a measure of robustness.

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