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Conserved economics of transcription termination in eubacteria

Unniraman, S and Prakash, R and Nagaraja, V (2002) Conserved economics of transcription termination in eubacteria. In: Nucluic Acids Research, 30 (3). pp. 675-684.

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Official URL: http://nar.oxfordjournals.org/cgi/content/abstract...


A secondary structure in the nascent RNA followed by a trail of U residues is believed to be necessary and sufficient to terminate transcription. Such structures represent an extremely economical mechanism of transcription termination since they function in the absence of any additional protein factors. We have developed a new algorithm, GeSTer, to identify putative terminators and analysed all available complete bacterial genomes. The algorithm classifies the structures into five classes. We find that potential secondary structure sequences are concentrated downstream of coding regions in most bacterial genomes. Interestingly, many of these structures are not followed by a discernible U-trail. However, irrespective of the nature of the trail sequence, the structures show a similar distribution, indicating that they serve the same purpose. In contrast, such a distribution is absent in archaeal genomes, indicating that they employ a distinct mechanism for transcription termination. The present algorithm represents the fastest and most accurate algorithm for identifying terminators in eubacterial genomes without being restricted by the classical Escherichia coli paradigm.

Item Type: Journal Article
Publication: Nucluic Acids Research
Publisher: Oxford Univ Press
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Rna Secondary Structure;Escherichia-Coli Rna;Rho;Polymerase;Elongation;Prediction;Hairpin;Gene;Antitermination;Efficiency.
Department/Centre: Division of Biological Sciences > Microbiology & Cell Biology
Date Deposited: 01 Jun 2009 10:36
Last Modified: 19 Sep 2010 05:00
URI: http://eprints.iisc.ac.in/id/eprint/18207

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