ArticleNucleic acids research2017
σ38-dependent promoter-proximal pausing by bacterial RNA polymerase.
Article in Nucleic acids research, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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5 citing papers in PubMed, 11 citations in OpenAlex.
- RpoS and the bacterial general stress response.Microbiology and molecular biology reviews : MMBR · 2024Review
- Structural and mechanistic basis of σ-dependent transcriptional pausing.Proceedings of the National Academy of Sciences of the United States of America · 2022Article
- Universal functions of the σ finger in alternative σ factors during transcription initiation by bacterial RNA polymerase.RNA biology · 2021Article
- Rewiring of growth-dependent transcription regulation by a point mutation in region 1.1 of the housekeeping σ factor.Nucleic acids research · 2020Article
- Review
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Authors and funding
3 authors at 2 institutions in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
Transcription initiation by bacterial RNA polymerase (RNAP) requires a variable σ subunit that directs it to promoters for site-specific priming of RNA synthesis. The principal σ subunit responsible for expression of house-keeping genes can bind the transcription elongation complex after initiation and induce RNAP pausing through specific interactions with promoter-like motifs in transcribed DNA. We show that the stationary phase and stress response σ38 subunit can also induce pausing by Escherichia coli RNAP on DNA templates containing promoter-like motifs in the transcribed regions. The pausing depends on σ38 contacts with the DNA template and RNAP core enzyme and results in formation of backtracked transcription elongation complexes, which can be reactivated by Gre factors that induce RNA cleavage by RNAP. Our data suggest that σ38 can bind the transcription elongation complex in trans but likely acts in cis during transcription initiation, by staying bound to RNAP and recognizing promoter-proximal pause signals. Analysis of σ38-dependent promoters reveals that a substantial fraction of them contain potential pause-inducing motifs, suggesting that σ38-depended pausing may be a common phenomenon in bacterial transcription.
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