Prevalence of transcription promoters within archaeal operons and coding sequences
Journal Article
·
· Molecular Systems Biology
- Inst. for Systems Biology, Seattle, WA (United States); DOE/OSTI
- Inst. for Systems Biology, Seattle, WA (United States)
- Inst. for Systems Biology, Seattle, WA (United States); Univ. of California, Davis, CA (United States). UC Davis Genome Center. Dept. of Biomedical Engineering
- Fred Hutchinson Cancer Research Center, Seattle, WA (United States). Divisions of Human Biology and Clinical Research
- Inst. for Systems Biology, Seattle, WA (United States); Fred Hutchinson Cancer Research Center, Seattle, WA (United States). Divisions of Human Biology and Clinical Research
Despite the knowledge of complex prokaryotic-transcription mechanisms, generalized rules, such as the simplified organization of genes into operons with well-defined promoters and terminators, have had a significant role in systems analysis of regulatory logic in both bacteria and archaea. Here, we have investigated the prevalence of alternate regulatory mechanisms through genome-wide characterization of transcript structures of B64% of all genes, including putative non-coding RNAs in Halobacterium salinarum NRC-1. Our integrative analysis of transcriptome dynamics and protein–DNA interaction data sets showed widespread environment-dependent modulation of operon architectures, transcription initiation and termination inside coding sequences, and extensive overlap in 30 ends of transcripts for many convergently transcribed genes. A significant fraction of these alternate transcriptional events correlate to binding locations of 11 transcription factors and regulators (TFs) inside operons and annotated genes—events usually considered spurious or non-functional. Using experimental validation, we illustrate the prevalence of overlapping genomic signals in archaeal transcription, casting doubt on the general perception of rigid boundaries between coding sequences and regulatory elements.
- Research Organization:
- Institute for Systems Biology, Seattle, WA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science Division
- Grant/Contract Number:
- FG02-07ER64327
- OSTI ID:
- 1623794
- Journal Information:
- Molecular Systems Biology, Journal Name: Molecular Systems Biology Journal Issue: 1 Vol. 5; ISSN 1744-4292
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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