Cited by 160Genomics and Chromatin DynamicsNuclear Structure and FunctionChromatin Remodeling and Cancer

Structure of complete Pol II–DSIF–PAF–SPT6 transcription complex reveals RTF1 allosteric activation

Vos, Seychelle M., Farnung, Lucas, Linden, Andreas, Urlaub, Henning, Cramer, Patrick·2020·Nature Structural & Molecular Biology

Abstract

Transcription by RNA polymerase II (Pol II) is carried out by an elongation complex. We previously reported an activated porcine Pol II elongation complex, EC*, encompassing the human elongation factors DSIF, PAF1 complex (PAF) and SPT6. Here we report the cryo-EM structure of the complete EC* that contains RTF1, a dissociable PAF subunit critical for chromatin transcription. The RTF1 Plus3 domain associates with Pol II subunit RPB12 and the phosphorylated C-terminal region of DSIF subunit SPT5. RTF1 also forms four α-helices that extend from the Plus3 domain along the Pol II protrusion and RPB10 to the polymerase funnel. The C-terminal 'fastener' helix retains PAF and is followed by a 'latch' that reaches the end of the bridge helix, a flexible element of the Pol II active site. RTF1 strongly stimulates Pol II elongation, and this requires the latch, possibly suggesting that RTF1 activates transcription allosterically by influencing Pol II translocation.

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Crossref · 10.1038/s41594-020-0437-1

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  • Rtf1 increases RNA Pol II speed in in vitro transcription assays.

    “On the other hand, consistent with a role of the Paf1C complex in RNA Pol II speed regulation, recent data show that the dissociable Paf1C subunit Rtf1 increases RNA Pol II speed in in vitro transcription assays (Vos et al, 2020).”
  • Recruitment of the PAF complex via a flexible AFF4 scaffold ensures transcript elongation, providing the structural basis for the transition from pausing to active elongation.

    “During this process, the recruitment of the PAF complex via a flexible AFF4 scaffold ensures transcript elongation, providing the structural basis for the transition from pausing to active elongation (Feinberg et al. 1991, Chou et al. 2013, Vos et al. 2020).”

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Authors
Vos, S. M., Farnung, L., Linden, A., Urlaub, H., & Cramer, P.
Affiliations
  • Max Planck Institute for Biophysical Chemistry (DE)
  • Universitätsmedizin Göttingen (DE)
Corresponding author
Cramer, Patrick
Venue
Nature Structural & Molecular Biology
Published
2020-06-15
Volume
27
Issue
7
Pages
668-677
ISSN
  • 1545-9985 (ISSN-L)
  • 1545-9993
OpenAlex
W3035713655
Cited by
160
References
80
Citations by year
2026: 18 · 2025: 27 · 2024: 30 · 2023: 31 · 2022: 25 · 2021: 23 · 2020: 6
FWCI
6.89
Type
journal article
Language
en
Open access
closed
Locations
  • Nature Structural & Molecular Biology (publishedVersion)
  • PubMed (publishedVersion)
  • MPG.PuRe (Max Planck Society) (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nuclear Structure and Function
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Chromatin Remodeling and Cancer
Keywords
RNA polymerase II, transcription elongation, Rtf1, Paf1 complex, DSIF, Spt6, allosteric activation, bridge helix, chromatin transcription, cryo-EM structure
MeSH terms
Allosteric Regulation, Humans, Models, Molecular, Nuclear Proteins, Protein Binding, Protein Conformation, RNA Polymerase II, Transcription Factors, Transcription, Genetic, Cryoelectron Microscopy, Transcriptional Elongation Factors, Multiprotein Complexes

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