Quantifying the regulatory role of individual transcription factors in Escherichia coli.
Quantifying the regulatory role of individual transcription factors in Escherichia coli.
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量化大肠杆菌中单个转录因子的调节作用。
DOI:
10.1016/j.celrep.2021.109952
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发表时间:
2021-11-09
期刊:
影响因子:
8.8
通讯作者:
Brewster RC
中科院分区:
文献类型:
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作者:
Guharajan S;Chhabra S;Parisutham V;Brewster RC
Gene regulation often results from the action of multiple transcription factors (TFs) acting at a promoter, obscuring the individual regulatory effect of each TF on RNA polymerase (RNAP). Here we measure the fundamental regulatory interactions of TFs in E. coli by designing synthetic target genes that isolate individual TFs’ regulatory effects. Using a thermodynamic model, each TF’s regulatory interactions are decoupled from TF occupancy and interpreted as acting through (de)stabilization of RNAP and (de)acceleration of transcription initiation. We find that the contribution of each mechanism depends on TF identity and binding location; regulation immediately downstream of the promoter is insensitive to TF identity, but the same TFs regulate by distinct mechanisms upstream of the promoter. These two mechanisms are uncoupled and can act coherently, to reinforce the observed regulatory role (activation/repression), or incoherently, wherein the TF regulates two distinct steps with opposing effects. Guharajan et al. investigate the isolated regulation of 6 E. coli transcription factors. The diverse regulatory outcomes are well described by a model wherein TFs act on two different steps of transcription. The degree to which each step is regulated depends on TF identity and binding location.
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影响因子:
4.3
作者:
Brewster RC;Jones DL;Phillips R
通讯作者:
Phillips R
影响因子:
9.9
作者:
Fakhouri, Walid D.;Ay, Ahmet;Sayal, Rupinder;Dresch, Jacqueline;Dayringer, Evan;Arnosti, David N.
通讯作者:
Arnosti, David N.
影响因子:
7.7
作者:
Ali MZ;Parisutham V;Choubey S;Brewster RC
通讯作者:
Brewster RC
影响因子:
14.9
作者:
Zhou Y;Kolb A;Busby SJ;Wang YP
通讯作者:
Wang YP
影响因子:
9.9
作者:
通讯作者:
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