Evolutionary Origins of Two-Barrel RNA Polymerases and Site-Specific Transcription Initiation

Evolutionary Origins of Two-Barrel RNA Polymerases and Site-Specific Transcription Initiation Evolution-related multisubunit RNA polymerases (RNAPs) carry out RNA synthesis in all domains life. Although their catalytic cores and fundamental mechanisms of transcription elongation are conserved, the initiation stage of the transcription cycle differs substantially in bacteria, archaea, and eukaryotes in terms of the requirements for accessory factors and details of the molecular mechanisms. This review focuses on recent insights into the evolution of the transcription apparatus with regard to (a) the surprisingly pervasive double- -barrel active-site configuration among different nucleic acid polymerase families, (b) the origin and phylogenetic distribution of TBP, TFB, and TFE transcription factors, and (c) the functional relationship between transcription and translation initiation mechanisms in terms of transcription start site selection and RNA structure. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Annual Review of Microbiology Annual Reviews

Evolutionary Origins of Two-Barrel RNA Polymerases and Site-Specific Transcription Initiation

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Publisher
Annual Reviews
Copyright
Copyright 2017 by Annual Reviews. All rights reserved
ISSN
0066-4227
eISSN
1545-3251
D.O.I.
10.1146/annurev-micro-091014-104145
Publisher site
See Article on Publisher Site

Abstract

Evolution-related multisubunit RNA polymerases (RNAPs) carry out RNA synthesis in all domains life. Although their catalytic cores and fundamental mechanisms of transcription elongation are conserved, the initiation stage of the transcription cycle differs substantially in bacteria, archaea, and eukaryotes in terms of the requirements for accessory factors and details of the molecular mechanisms. This review focuses on recent insights into the evolution of the transcription apparatus with regard to (a) the surprisingly pervasive double- -barrel active-site configuration among different nucleic acid polymerase families, (b) the origin and phylogenetic distribution of TBP, TFB, and TFE transcription factors, and (c) the functional relationship between transcription and translation initiation mechanisms in terms of transcription start site selection and RNA structure.

Journal

Annual Review of MicrobiologyAnnual Reviews

Published: Sep 8, 2017

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