Telling time with an intrinsically noisy clock

Details Telling time with an intrinsically noisy clock Telling time with an intrinsically noisy clock

2010-02-12

arxiv.org/abs/1002.2474v1

Published as "Information-optimal transcriptional response to oscillatory driving," Phys. Rev. Lett. 105, 058101 (2010)

Biology

Quantitative Biology

Molecular Networks

10 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.105.058101

Intracellular transmission of information via chemical and transcriptional networks is thwarted by a physical limitation: the finite copy number of the constituent chemical species introduces unavoidable intrinsic noise. Here we provide a method for solving for the complete probabilistic description of intrinsically noisy oscillatory driving. We derive and numerically verify a number of simple scaling laws. Unlike in the case of measuring a static quantity, response to an oscillatory driving can exhibit a resonant frequency which maximizes information transmission. Further, we show that the optimal regulatory design is dependent on the biophysical constraints (i.e., the allowed copy number and response time). The resulting phase diagram illustrates under what conditions threshold regulation outperforms linear regulation.

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