Cited by 117RNA and protein synthesis mechanismsGenomics and Chromatin DynamicsRNA Research and Splicing

Nascent RNA structure modulates the transcriptional dynamics of RNA polymerases

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Zamft, Bradley, Bintu, Lacramioara, Ishibashi, Toyotaka, Bustamante, Carlos·2012·Proceedings of the National Academy of Sciences

Abstract

RNA polymerase pausing represents an important mechanism of transcriptional regulation. In this study, we use a single-molecule transcription assay to investigate the effect of template base-pair composition on pausing by RNA polymerase II and the evolutionarily distinct mitochondrial polymerase Rpo41. For both enzymes, pauses are shorter and less frequent on GC-rich templates. Significantly, incubation with RNase abolishes the template dependence of pausing. A kinetic model, wherein the secondary structure of the nascent RNA poses an energetic barrier to pausing by impeding backtracking along the template, quantitatively predicts the pause densities and durations observed. The energy barriers extracted from the data correlate well with RNA folding energies obtained from cotranscriptional folding simulations. These results reveal that RNA secondary structures provide a cis -acting mechanism by which sequence modulates transcriptional elongation.

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Crossref · 10.1073/pnas.1205063109

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  • The role played by GC content in RNA Pol II speed in cellulo might be more complex than anticipated.

    “As GC rich templates have been shown to increase RNA pol II speed in vitro (Zamft et al, 2012), the role played by the GC content in RNA pol II speed in cellulo might be more complex than anticipated.”

    From RNA polymerase II speed: a key player in controlling and adapting transcriptome composition (2021) · cites this paper as Zamft et al, 2012

    The Experimental Setup reports that higher GC content reduces Pol II pause duration and pause density, which can increase transcriptional throughput in the in vitro experiment. But it also says pause-free velocity is template-independent; the cited finding is reduced pausing, not an increase in Pol II's pause-free speed. The statement about complexity in cellulo is the citing authors’ inference, not a finding attributed to this source. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Co-transcriptional folding of nascent RNA at GC-rich sequences may impose an energy barrier to pausing by impeding backtracking along DNA.

    “This is probably due to co‐transcriptional folding of nascent RNA which, at GC‐rich sequences, may impose an energy barrier to pausing by impeding backtracking along the DNA (Zamft et al, 2012).”
  • In vitro transcription assays showed that RNA Pol II pauses are shorter and less frequent on GC-rich templates.

    “Indeed, in vitro transcription assays showed that RNA Pol II pauses are shorter and less frequent on GC‐rich templates.”

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Authors
Zamft, B., Bintu, L., Ishibashi, T., & Bustamante, C.
Affiliations
  • University of California, Berkeley (US)
  • Howard Hughes Medical Institute (US)
Corresponding author
Bustamante, Carlos
Venue
Proceedings of the National Academy of Sciences
Published
2012-05-21
Volume
109
Issue
23
Pages
8948-8953
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2129738296
Cited by
117
References
49
Citations by year
2026: 3 · 2025: 8 · 2024: 7 · 2023: 4 · 2022: 8 · 2021: 7 · 2020: 14 · 2019: 9 · 2018: 6 · 2017: 14 · 2016: 9 · 2015: 5 · 2014: 11 · 2013: 9 · 2012: 2
FWCI
3.47
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Rare & Special e-Zone (The Hong Kong University of Science and Technology) (submittedVersion)
Funders
  • Howard Hughes Medical Institute
  • U.S. Department of Energy (DEAC03-76SF00098)
  • National Institutes of Health
  • Japan Society for the Promotion of Science
  • National Institute of General Medical Sciences (R01-GM0325543)
  • Lawrence Berkeley National Laboratory
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA and protein synthesis mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Research and Splicing
Keywords
RNA polymerase pausing, RNA polymerase II, transcription elongation, backtracking, ribonuclease, kinetic model, cis-acting regulation
MeSH terms
Base Composition, Computer Simulation, Models, Biological, Oligonucleotides, RNA, RNA Polymerase II, DNA-Directed RNA Polymerases, Saccharomyces cerevisiae, Transcription, Genetic, Polymerase Chain Reaction, Myxococcus xanthus, Mitochondrial Proteins, Saccharomyces cerevisiae Proteins, RNA Folding

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