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2018 ; 8
(1
): 3594
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Network Motifs Capable of Decoding Transcription Factor Dynamics
#MMPMID29483553
Gao Z
; Chen S
; Qin S
; Tang C
Sci Rep
2018[Feb]; 8
(1
): 3594
PMID29483553
show ga
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.