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Contribution of bistability and noise to cell fate transitions determined by feedback opening

Hsu, Chieh and Jaquet, Vincent and Maleki, Farzaneh and Becskei, Attila. (2016) Contribution of bistability and noise to cell fate transitions determined by feedback opening. Journal of Molecular Biology, 428 (20). pp. 4115-4128.

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Official URL: http://edoc.unibas.ch/43805/

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Abstract

Alternative cell fates represent a form of non-genetic diversity, which can promote adaptation and functional specialization. It is difficult to predict the rate of the transition between two cell fates due to the strong effect of noise on feedback loops and missing parameters. We opened synthetic positive feedback loops experimentally to obtain open-loop functions. These functions allowed us to identify a deterministic model of bistability by bypassing noise and the requirement to resolve individual processes in the loop. Combining the open-loop function with kinetic measurements and re-introducing the measured noise, we were able to predict the transition rates for the feedback systems without parameter tuning. Noise in gene expression was the key determinant of the transition rates inside the bistable range. Transitions between two cell fates were also observed outside of the bistable range, evidenced by bimodality and hysteresis. In this case, a slow transient process was the rate limiting step in the transitions. Thus, feedback opening is an effective approach to identify the determinants of cell fate transitions and to predict their rates.
Faculties and Departments:05 Faculty of Science
05 Faculty of Science > Departement Biozentrum
05 Faculty of Science > Departement Biozentrum > Computational & Systems Biology
05 Faculty of Science > Departement Biozentrum > Computational & Systems Biology > Synthetic Microbiology (Becskei)
UniBasel Contributors:Becskei, Attila and Jaquet, Vincent and Maleki, Farzaneh and Hsu, Chieh
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Elsevier
ISSN:0022-2836
e-ISSN:1089-8638
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
Identification Number:
Last Modified:18 May 2018 11:06
Deposited On:03 Jan 2017 10:05

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