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Publication type: Article in scientific journal
Type of review: Peer review (publication)
Title: A stochastic model of the emergence of autocatalytic cycles
Authors: Filisetti, Alessandro
Graudenzi, Alex
Serra, Roberto
Villani, Marco
DeLucrezia, Davide
Füchslin, Rudolf Marcel
Kauffman, Stuart A.
Packard, Norman
Poli, Irene
DOI: 10.21256/zhaw-1673
Published in: Journal of Systems Chemistry
Volume(Issue): 2
Issue: 2
Issue Date: 2011
Publisher / Ed. Institution: BioMed Central
ISSN: 1759-2208
Language: English
Subjects: Temporal window; Average connectivity; Gillespie algorithm; Reaction graph; Transient complex
Subject (DDC): 540: Chemistry
570: Biology
Abstract: Autocatalytic cycles are rather common in biological systems and they might have played a major role in the transition from non-living to living systems. Several theoretical models have been proposed to address the experimentalists during the investigation of this issue and most of them describe a phase transition depending upon the level of heterogeneity of the chemical soup. Nevertheless, it is well known that reproducing the emergence of autocatalytic sets in wet laboratories is a hard task. Understanding the rationale at the basis of such a mismatch between theoretical predictions and experimental observations is therefore of fundamental importance. We here introduce a novel stochastic model of catalytic reaction networks, in order to investigate the emergence of autocatalytic cycles, sensibly considering the importance of noise, of small-number effects and the possible growth of the number of different elements in the system. Furthermore, the introduction of a temporal threshold that defines how long a specific reaction is kept in the reaction graph allows to univocally define cycles also within an asynchronous framework. The foremost analyses have been focused on the study of the variation of the composition of the incoming flux. It was possible to show that the activity of the system is enhanced, with particular regard to the emergence of autocatalytic sets, if a larger number of different elements is present in the incoming flux, while the specific length of the species seems to entail minor effects on the overall dynamics.
Fulltext version: Published version
License (according to publishing contract): CC BY 2.0: Attribution 2.0 Generic
Departement: School of Engineering
Appears in Collections:Publikationen School of Engineering

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