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Detecting Concentration Changes with Cooperative Receptors
Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
Number of Authors: 2
2016 (English)In: Journal of statistical physics, ISSN 0022-4715, E-ISSN 1572-9613, Vol. 162, no 5, 1365-1382 p.Article in journal (Refereed) Published
Abstract [en]

Cells constantly need to monitor the state of the environment to detect changes and timely respond. The detection of concentration changes of a ligand by a set of receptors can be cast as a problem of hypothesis testing, and the cell viewed as a Neyman-Pearson detector. Within this framework, we investigate the role of receptor cooperativity in improving the cell's ability to detect changes. We find that cooperativity decreases the probability of missing an occurred change. This becomes especially beneficial when difficult detections have to be made. Concerning the influence of cooperativity on how fast a desired detection power is achieved, we find in general that there is an optimal value at finite levels of cooperation, even though easy discrimination tasks can be performed more rapidly by noncooperative receptors.

Place, publisher, year, edition, pages
2016. Vol. 162, no 5, 1365-1382 p.
Keyword [en]
Sensing, Cooperativity, Hypothesis testing, Stochastic processes
National Category
Physical Sciences
URN: urn:nbn:se:su:diva-128526DOI: 10.1007/s10955-015-1354-2ISI: 000371088000014OAI: diva2:917304
Available from: 2016-04-06 Created: 2016-03-30 Last updated: 2016-04-06Bibliographically approved

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Bo, Stefano
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Nordic Institute for Theoretical Physics (Nordita)
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