A system-level model for the microbial regulatory genome
Journal Article
·
· Molecular Systems Biology
- Inst. for Systems Biology, Seattle, WA (United States); Univ. of Washington, Seattle, WA (United States). Molecular and Cellular Biology Program; DOE/OSTI
- Inst. for Systems Biology, Seattle, WA (United States)
- Université Laval, Québec, QC (Canada). Département de Physique de Génie Physique et d'Optique
- Inst. for Systems Biology, Seattle, WA (United States); Univ. of Sao Paulo, Ribeirao Preto (Brazil). LabPIB. Dept. of Computing and Mathematics FFCLRP‐USP
- Inst. for Systems Biology, Seattle, WA (United States); Univ. of Washington, Seattle, WA (United States). Molecular and Cellular Biology Program; Univ. of Washington, Seattle, WA (United States). Depts. of Microbiology and Biology; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
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.
- Research Organization:
- Institute for Systems Biology, Seattle, WA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Oak Ridge Associated Univ., Oak Ridge, TN (United States); Univ. of Washington, Seattle, WA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science Division
- Grant/Contract Number:
- AC02-05CH11231; AC05-06OR23100; FG02-07ER64327; FG02-08ER64685
- OSTI ID:
- 1627935
- Journal Information:
- Molecular Systems Biology, Journal Name: Molecular Systems Biology Journal Issue: 7 Vol. 10; ISSN 1744-4292
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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