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Multiplexing information flow through dynamic signalling systems.

ABSTRACT: We consider how a signalling system can act as an information hub by multiplexing information arising from multiple signals. We formally define multiplexing, mathematically characterise which systems can multiplex and how well they can do it. While the results of this paper are theoretical, to motivate the idea of multiplexing, we provide experimental evidence that tentatively suggests that the NF-?B transcription factor can multiplex information about changes in multiple signals. We believe that our theoretical results may resolve the apparent paradox of how a system like NF-?B that regulates cell fate and inflammatory signalling in response to diverse stimuli can appear to have the low information carrying capacity suggested by recent studies on scalar signals. In carrying out our study, we introduce new methods for the analysis of large, nonlinear stochastic dynamic models, and develop computational algorithms that facilitate the calculation of fundamental constructs of information theory such as Kullback-Leibler divergences and sensitivity matrices, and link these methods to a new theory about multiplexing information. We show that many current models such as those of the NF-?B system cannot multiplex effectively and provide models that overcome this limitation using post-transcriptional modifications.

SUBMITTER: Minas G

PROVIDER: S-EPMC7425991 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature

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Multiplexing information flow through dynamic signalling systems.

Minas Giorgos G Woodcock Dan J DJ Ashall Louise L Harper Claire V CV White Michael R H MRH Rand David A DA

PLoS computational biology 20200803 8

We consider how a signalling system can act as an information hub by multiplexing information arising from multiple signals. We formally define multiplexing, mathematically characterise which systems can multiplex and how well they can do it. While the results of this paper are theoretical, to motivate the idea of multiplexing, we provide experimental evidence that tentatively suggests that the NF-κB transcription factor can multiplex information about changes in multiple signals. We believe tha ...[more]

PMID: 32745094

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Multiplexing information flow through dynamic signalling systems.

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Multiplexing information flow through dynamic signalling systems.

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