Stochastic Coherence in an Oscillatory Gene Circuit Model

Details Stochastic Coherence in an Oscillatory Gene Circuit Model Stochastic Coherence in an Oscillatory Gene Circuit Model

2009-08-03

arxiv.org/abs/0908.0339v1

J. Theor. Biology 253 (2008) 349

Biology

Quantitative Biology

Molecular Networks

Scientific paper

10.1016/j.jtbi.2008.03.012

We show that noise-induced oscillations in a gene circuit model display stochastic coherence, that is, a maximum in the regularity of the oscillations as a function of noise amplitude. The effect is manifest as a system-size effect in a purely stochastic molecular reaction description of the circuit dynamics. We compare the molecular reaction model behavior with that predicted by a rate equation version of the same system. In addition, we show that commonly used reduced models that ignore fast operator reactions do not capture the full stochastic behavior of the gene circuit. Stochastic coherence occurs under conditions that may be physiologically relevant.

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