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Maps for when the living gets tough: Maneuvering through a hostile energy landscape

Mondeel, T.D.G.A., Rehman, S., Zhang, Y., Verma, M., Dürre, P., Barberis, Matteo and Westerhoff, H.V. (2016) Maps for when the living gets tough: Maneuvering through a hostile energy landscape IFAC-PapersOnLine, 49 (26). pp. 364-370.

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With genome sequencing of thousands of organisms, a scaffold has become available for data integration: molecular information can now be organized by attaching it to the genes and their gene-expression products. It is however, the genome that is selfish not the gene, making it necessary to organize the information into maps that enable functional interpretation of the fitness of the genome. Using flux balance analysis one can calculate the theoretical capabilities of the living organism. Here we examine whether according to this genome organized information, organisms such as the ones present when life on Earth began, are able to assimilate the Gibbs energy and carbon that life needs for its reproduction and maintenance, from a relatively poor Gibbs-energy environment. We shall address how Clostridium ljungdahlii may use at least two special features and one special pathway to this end: gear-shifting, electron bifurcation and the Wood-Ljungdahl pathway. Additionally, we examined whether the C. ljungdahlii map can also help solve the problem of waste management. We find that there is a definite effect of the choices of redox equivalents in the Wood-Ljungdahl pathway and the hydrogenase on the yield of interesting products like hydroxybutyrate. We provide a drawing of a subset of the metabolic network that may be utilized to project flux distributions onto by the community in future works. Furthermore, we make all the code leading to the results discussed here publicly available for the benefit of future work.

Item Type: Article
Divisions : Faculty of Health and Medical Sciences > School of Biosciences and Medicine
Authors :
Mondeel, T.D.G.A.
Rehman, S.
Zhang, Y.
Verma, M.
Dürre, P.
Westerhoff, H.V.
Date : 2016
Funders : European Union Seventh Framework Programme
DOI : 10.1016/j.ifacol.2017.03.002
Grant Title : SYNPOL project
Uncontrolled Keywords : Biodegradable plastics; Clostridium ljungdahlii; Electron bifurcation; Flux-balance analysis; Gear-shifting; Genome-wide metabolic map; Syngas; Wood-Ljungdahl pathway
Depositing User : Clive Harris
Date Deposited : 12 Apr 2019 12:35
Last Modified : 12 Apr 2019 12:35

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