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Title: Prevalence of transcription promoters within archaeal operons and coding sequences

Journal Article · · Molecular Systems Biology
DOI:https://doi.org/10.1038/msb.2009.42· OSTI ID:1623794
 [1];  [1];  [1];  [1];  [2];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [3];  [4];  [4]
  1. Inst. for Systems Biology, Seattle, WA (United States)
  2. Inst. for Systems Biology, Seattle, WA (United States); Univ. of California, Davis, CA (United States). UC Davis Genome Center. Dept. of Biomedical Engineering
  3. Fred Hutchinson Cancer Research Center, Seattle, WA (United States). Divisions of Human Biology and Clinical Research
  4. 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, Vol. 5, Issue 1; ISSN 1744-4292
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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