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Stochastic dynamics of genetic networks: modelling and parameter identification


Cinquemani, Eugenio; Milias-Argeitis, Andreas; Summers, Sean; Lygeros, John (2008). Stochastic dynamics of genetic networks: modelling and parameter identification. Bioinformatics, 24(23):2748-2754.

Abstract

Identification of regulatory networks is typically based on deterministic models of gene expression. Increasing experimental evidence suggests that the gene regulation process is intrinsically random. To ensure accurate and thorough processing of the experimental data, stochasticity must be explicitly accounted for both at the modelling stage and in the design of the identification algorithms. Results: We propose a model of gene expression in prokaryotes where transcription is described as a probabilistic event, whereas protein synthesis and degradation are captured by first order deterministic kinetics. Based on this model and assuming that the network of interactions is known, a method for estimating unknown parameters such as synthesis and binding rates from the outcomes of multiple time course experiments is introduced. The method accounts naturally for sparse, irregularly sampled and noisy data and is applicable to gene networks of arbitrary size. The performance of the method is evaluated on a model of nutrient stress response in Escherichia coli.

Abstract

Identification of regulatory networks is typically based on deterministic models of gene expression. Increasing experimental evidence suggests that the gene regulation process is intrinsically random. To ensure accurate and thorough processing of the experimental data, stochasticity must be explicitly accounted for both at the modelling stage and in the design of the identification algorithms. Results: We propose a model of gene expression in prokaryotes where transcription is described as a probabilistic event, whereas protein synthesis and degradation are captured by first order deterministic kinetics. Based on this model and assuming that the network of interactions is known, a method for estimating unknown parameters such as synthesis and binding rates from the outcomes of multiple time course experiments is introduced. The method accounts naturally for sparse, irregularly sampled and noisy data and is applicable to gene networks of arbitrary size. The performance of the method is evaluated on a model of nutrient stress response in Escherichia coli.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:Special Collections > SystemsX.ch
Special Collections > SystemsX.ch > Research, Technology and Development Projects > YeastX
Special Collections > SystemsX.ch > Research, Technology and Development Projects
Dewey Decimal Classification:570 Life sciences; biology
Language:English
Date:2008
Deposited On:04 Jul 2013 09:15
Last Modified:05 Apr 2016 16:51
Publisher:Oxford University Press
ISSN:1367-4803
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1093/bioinformatics/btn527
PubMed ID:18845579

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