DNA-directed RNA polymerase subunit beta / RNA polymerase II subunit D / DNA-directed RNA polymerase II subunit RPB3 / DNA-directed RNA polymerase II subunit RPB11-a / DNA-directed RNA polymerases I, II, and III subunit RPABC3 / DNA-directed RNA polymerases I, II, and III subunit RPABC2 / DNA-directed RNA polymerase II subunit RPB7 / RNA polymerase II, I and III subunit K / DNA-directed RNA polymerase II subunit E / DNA-directed RNA polymerase II subunit RPB9 Similarity search - Component
Biological species
Sus scrofa domesticus (domestic pig)
Method
single particle reconstruction / cryo EM / Resolution: 3.5 Å
H2020 Marie Curie Actions of the European Commission
894862
Germany
German Research Foundation (DFG)
EXC 2067/1 39072994
Germany
German Research Foundation (DFG)
SFB860
Germany
German Research Foundation (DFG)
SPP2191
Germany
European Research Council (ERC)
CHROMATRANS 882357
Germany
Citation
Journal: Nucleic Acids Res / Year: 2021 Title: Structure of an inactive RNA polymerase II dimer. Authors: Shintaro Aibara / Christian Dienemann / Patrick Cramer / Abstract: Eukaryotic gene transcription is carried out by three RNA polymerases: Pol I, Pol II and Pol III. Although it has long been known that Pol I can form homodimers, it is unclear whether and how the two ...Eukaryotic gene transcription is carried out by three RNA polymerases: Pol I, Pol II and Pol III. Although it has long been known that Pol I can form homodimers, it is unclear whether and how the two other RNA polymerases dimerize. Here we present the cryo-electron microscopy (cryo-EM) structure of a mammalian Pol II dimer at 3.5 Å resolution. The structure differs from the Pol I dimer and reveals that one Pol II copy uses its RPB4-RPB7 stalk to penetrate the active centre cleft of the other copy, and vice versa, giving rise to a molecular handshake. The polymerase clamp domain is displaced and mobile, and the RPB7 oligonucleotide-binding fold mimics the DNA-RNA hybrid that occupies the cleft during active transcription. The Pol II dimer is incompatible with nucleic acid binding as required for transcription and may represent an inactive storage form of the polymerase.
History
Deposition
Jun 28, 2021
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Header (metadata) release
Oct 6, 2021
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Map release
Oct 6, 2021
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Update
Jul 17, 2024
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Current status
Jul 17, 2024
Processing site: PDBe / Status: Released
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Structure visualization
Movie
Surface view with section colored by density value
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