A system-level model for the microbial regulatory genome.

A system-level model for the microbial regulatory genome.
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DOI:
10.15252/msb.20145160
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发表时间:
2014-07-15
影响因子:
9.9
通讯作者:
Baliga NS
Baliga NS
中科院分区:
生物学1区
文献类型:
--
作者:
Brooks AN;Reiss DJ;Allard A;Wu WJ;Salvanha DM;Plaisier CL;Chandrasekaran S;Pan M;Kaur A;Baliga NS

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Microbes can tailor transcriptional responses to diverse environmental challenges despite having streamlined genomes and a limited number of regulators. Here, we present data-driven models that capture the dynamic interplay of the environment and genome-encoded regulatory programs of two types of prokaryotes: Escherichia coli (a bacterium) and Halobacterium salinarum (an archaeon). The models reveal how the genome-wide distributions of cis-acting gene regulatory elements and the conditional influences of transcription factors at each of those elements encode programs for eliciting a wide array of environment-specific responses. We demonstrate how these programs partition transcriptional regulation of genes within regulons and operons to re-organize gene–gene functional associations in each environment. The models capture fitness-relevant co-regulation by different transcriptional control mechanisms acting across the entire genome, to define a generalized, system-level organizing principle for prokaryotic gene regulatory networks that goes well beyond existing paradigms of gene regulation. An online resource (http://egrin2.systemsbiology.net) has been developed to facilitate multiscale exploration of conditional gene regulation in the two prokaryotes.
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