Network Motifs Capable of Decoding Transcription Factor Dynamics

Scientific Reports
Zongmao GaoChao Tang

Abstract

Transcription factors (TFs) can encode the information of upstream signal in terms of its temporal activation dynamics. However, it remains unclear how different types of TF dynamics are decoded by downstream signalling networks. In this work, we studied all three-node transcriptional networks for their ability to distinguish two types of TF dynamics: amplitude modulation (AM), where the TF is activated with a constant amplitude, and frequency modulation (FM), where the TF activity displays an oscillatory behavior. We found two sets of network topologies: one set can differentially respond to AM TF signal but not to FM; the other set to FM signal but not to AM. Interestingly, there is little overlap between the two sets. We identified the prevalent topological features in each set and gave a mechanistic explanation as to why they can differentially respond to only one type of TF signal. We also found that some network topologies have a weak (not robust) ability to differentially respond to both AM and FM input signals by using different values of parameters for AM and FM cases. Our results provide a novel network mechanism for decoding different TF dynamics.

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Citations

Jun 30, 2019·Development·Pulin Li, Michael B Elowitz
Nov 20, 2020·European Respiratory Review : an Official Journal of the European Respiratory Society·Antoine FroidureArnaud Mailleux
Jul 28, 2021·Journal of Cell Science·Anna M DowbajErik Sahai

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