The relationship between stochastic and deterministic quasi-steady state approximations

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dc.citation.journalTitleBMC Systems Biologyen_US
dc.citation.volumeNumber9en_US
dc.contributor.authorKim, Jae Kyoungen_US
dc.contributor.authorJosić, Krešimiren_US
dc.contributor.authorBennett, Matthew R.en_US
dc.date.accessioned2016-01-15T19:47:51Zen_US
dc.date.available2016-01-15T19:47:51Zen_US
dc.date.issued2015en_US
dc.description.abstractBackground: The quasi steady-state approximation (QSSA) is frequently used to reduce deterministic models of biochemical networks. The resulting equations provide a simplified description of the network in terms of non-elementary reaction functions (e.g. Hill functions). Such deterministic reductions are frequently a basis for heuristic stochastic models in which non-elementary reaction functions are used to define reaction propensities. Despite their popularity, it remains unclear when such stochastic reductions are valid. It is frequently assumed that the stochastic reduction can be trusted whenever its deterministic counterpart is accurate. However, a number of recent examples show that this is not necessarily the case. Results: Here we explain the origin of these discrepancies, and demonstrate a clear relationship between the accuracy of the deterministic and the stochastic QSSA for examples widely used in biological systems. With an analysis of a two-state promoter model, and numerical simulations for a variety of other models, we find that the stochastic QSSA is accurate whenever its deterministic counterpart provides an accurate approximation over a range of initial conditions which cover the likely fluctuations from the quasi steady-state (QSS). We conjecture that this relationship provides a simple and computationally inexpensive way to test the accuracy of reduced stochastic models using deterministic simulations. Conclusions: The stochastic QSSA is one of the most popular multi-scale stochastic simulation methods. While the use of QSSA, and the resulting non-elementary functions has been justified in the deterministic case, it is not clear when their stochastic counterparts are accurate. In this study, we show how the accuracy of the stochastic QSSA can be tested using their deterministic counterparts providing a concrete method to test when non-elementary rate functions can be used in stochastic simulations.en_US
dc.identifier.citationKim, Jae Kyoung, Josić, Krešimir and Bennett, Matthew R.. "The relationship between stochastic and deterministic quasi-steady state approximations." <i>BMC Systems Biology,</i> 9, (2015) Springer: http://dx.doi.org/10.1186/s12918-015-0218-3.en_US
dc.identifier.doihttp://dx.doi.org/10.1186/s12918-015-0218-3en_US
dc.identifier.urihttps://hdl.handle.net/1911/87850en_US
dc.language.isoengen_US
dc.publisherSpringeren_US
dc.rightsThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) anden_US
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en_US
dc.subject.keywordStochastic QSSAen_US
dc.subject.keywordMulti-scale stochastic simulationen_US
dc.subject.keywordHill functionen_US
dc.subject.keywordMichaelis-Menten functionen_US
dc.titleThe relationship between stochastic and deterministic quasi-steady state approximationsen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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