A global analysis of transcription reveals two modes of Spt4/5 recruitment to archaeal RNA polymerase

Smollett, K., Blombach, F., Reichelt, R., Thomm, M. and Werner, F. (2017) A global analysis of transcription reveals two modes of Spt4/5 recruitment to archaeal RNA polymerase. Nature Microbiology, 2, p. 17021. (doi:10.1038/nmicrobiol.2017.21) (PMID:28248297)

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Abstract

The archaeal transcription apparatus is closely related to the eukaryotic RNA polymerase (RNAP) II system, while archaeal genomes are more similar to bacteria with densely packed genes organized in operons. This makes understanding transcription in archaea vital, both in terms of molecular mechanisms and evolution. Very little is known about how archaeal cells orchestrate transcription on a systems level. We have characterized the genome-wide occupancy of the Methanocaldococcus jannaschii transcription machinery and its transcriptome. Our data reveal how the TATA and BRE promoter elements facilitate recruitment of the essential initiation factors TATA-binding protein and transcription factor B, respectively, which in turn are responsible for the loading of RNAP into the transcription units. The occupancies of RNAP and Spt4/5 strongly correlate with each other and with RNA levels. Our results show that Spt4/5 is a general elongation factor in archaea as its presence on all genes matches RNAP. Spt4/5 is recruited proximal to the transcription start site on the majority of transcription units, while on a subset of genes, including rRNA and CRISPR loci, Spt4/5 is recruited to the transcription elongation complex during early elongation within 500 base pairs of the transcription start site and akin to its bacterial homologue NusG.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Smollett, Dr Katherine
Authors: Smollett, K., Blombach, F., Reichelt, R., Thomm, M., and Werner, F.
College/School:College of Medical Veterinary and Life Sciences > Institute of Infection Immunity and Inflammation
Journal Name:Nature Microbiology
Publisher:Nature Publishing Group
ISSN:2058-5276
ISSN (Online):2058-5276
Copyright Holders:Copyright © 2017 Macmillan Publishers Limited, part of Springer Nature
First Published:First published in Nature Microbiology 2:17021
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher.

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