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Multidimensional biochemical information processing of dynamical patterns

Yoshihiko Hasegawa*

  • Department of Information and Communication Engineering, Graduate School of Information Science and Technology, The University of Tokyo, Tokyo 113-8656, Japan

  • *hasegawa@biom.t.u-tokyo.ac.jp
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Phys. Rev. E 97, 022401 – Published 8 February, 2018

DOI: https://doi.org/10.1103/PhysRevE.97.022401

Abstract

Cells receive signaling molecules by receptors and relay information via sensory networks so that they can respond properly depending on the type of signal. Recent studies have shown that cells can extract multidimensional information from dynamical concentration patterns of signaling molecules. We herein study how biochemical systems can process multidimensional information embedded in dynamical patterns. We model the decoding networks by linear response functions, and optimize the functions with the calculus of variations to maximize the mutual information between patterns and output. We find that, when the noise intensity is lower, decoders with different linear response functions, i.e., distinct decoders, can extract much information. However, when the noise intensity is higher, distinct decoders do not provide the maximum amount of information. This indicates that, when transmitting information by dynamical patterns, embedding information in multiple patterns is not optimal when the noise intensity is very large. Furthermore, we explore the biochemical implementations of these decoders using control theory and demonstrate that these decoders can be implemented biochemically through the modification of cascade-type networks, which are prevalent in actual signaling pathways.

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Outline

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Phys. Rev. E 97, 022401– Published 8 February, 2018
  • Received 27 April 2017
  • Revised 9 September 2017
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