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Open data
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Basic information
Entry | Database: PDB / ID: 5u0p | ||||||
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Title | Cryo-EM structure of the transcriptional Mediator | ||||||
![]() | (Mediator complex subunit ...) x 16 | ||||||
![]() | TRANSCRIPTION / transcriptional / Mediator / Head / Middle / Tail / Srb / RNA polymerase II / Med | ||||||
Function / homology | ![]() core mediator complex / mediator complex / termination of RNA polymerase II transcription / positive regulation of transcription initiation by RNA polymerase II / transcription initiation at RNA polymerase II promoter / transcription coregulator activity / euchromatin / transcription coactivator activity / RNA polymerase II cis-regulatory region sequence-specific DNA binding / regulation of transcription by RNA polymerase II ...core mediator complex / mediator complex / termination of RNA polymerase II transcription / positive regulation of transcription initiation by RNA polymerase II / transcription initiation at RNA polymerase II promoter / transcription coregulator activity / euchromatin / transcription coactivator activity / RNA polymerase II cis-regulatory region sequence-specific DNA binding / regulation of transcription by RNA polymerase II / nucleus / cytoplasm Similarity search - Function | ||||||
Biological species | ![]() ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.4 Å | ||||||
![]() | Tsai, K.-L. / Yu, X. / Gopalan, S. / Chao, T.-C. / Zhang, Y. / Florens, L. / Washburn, M.P. / Murakami, K. / Conaway, R.C. / Conaway, J.W. / Asturias, F. | ||||||
![]() | ![]() Title: Mediator structure and rearrangements required for holoenzyme formation. Authors: Kuang-Lei Tsai / Xiaodi Yu / Sneha Gopalan / Ti-Chun Chao / Ying Zhang / Laurence Florens / Michael P Washburn / Kenji Murakami / Ronald C Conaway / Joan W Conaway / Francisco J Asturias / ![]() Abstract: The conserved Mediator co-activator complex has an essential role in the regulation of RNA polymerase II transcription in all eukaryotes. Understanding the structure and interactions of Mediator is ...The conserved Mediator co-activator complex has an essential role in the regulation of RNA polymerase II transcription in all eukaryotes. Understanding the structure and interactions of Mediator is crucial for determining how the complex influences transcription initiation and conveys regulatory information to the basal transcription machinery. Here we present a 4.4 Å resolution cryo-electron microscopy map of Schizosaccharomyces pombe Mediator in which conserved Mediator subunits are individually resolved. The essential Med14 subunit works as a central backbone that connects the Mediator head, middle and tail modules. Comparison with a 7.8 Å resolution cryo-electron microscopy map of a Mediator-RNA polymerase II holoenzyme reveals that changes in the structure of Med14 facilitate a large-scale Mediator rearrangement that is essential for holoenzyme formation. Our study suggests that access to different conformations and crosstalk between structural elements are essential for the Mediator regulation mechanism, and could explain the capacity of the complex to integrate multiple regulatory signals. | ||||||
History |
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Structure visualization
Movie |
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Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 494.5 KB | Display | ![]() |
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PDB format | ![]() | 357.1 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 1021.3 KB | Display | ![]() |
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Full document | ![]() | 1.1 MB | Display | |
Data in XML | ![]() | 79.9 KB | Display | |
Data in CIF | ![]() | 127 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 8479MC ![]() 8480C ![]() 5u0sC M: map data used to model this data C: citing same article ( |
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Similar structure data |
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Links
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Assembly
Deposited unit | ![]()
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Components
-Mediator complex subunit ... , 16 types, 16 molecules NFHQRTKVDGU3I2SJ
#1: Protein | Mass: 105382.461 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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#2: Protein | Mass: 24928.947 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#3: Protein | Mass: 23360.068 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#4: Protein | Mass: 62551.410 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#5: Protein | Mass: 24056.377 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#6: Protein | Mass: 22374.775 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#7: Protein | Mass: 13118.800 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#8: Protein | Mass: 15396.165 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#9: Protein | Mass: 20358.010 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#10: Protein | Mass: 43573.094 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#11: Protein | Mass: 15821.031 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#12: Protein | Mass: 16913.975 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#13: Protein | Mass: 13810.964 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#14: Protein | Mass: 31132.693 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#15: Protein | Mass: 11847.596 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#16: Protein | Mass: 11251.861 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
Component | Name: Mediator complex / Type: COMPLEX / Entity ID: all / Source: NATURAL |
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Source (natural) | Organism: ![]() ![]() |
Buffer solution | pH: 7.4 Details: 20 mM HEPES, pH 7.4, 200 mM potassium acetate, 5 mM b-Mercaptoethanol, 0.01% NP-40 |
Specimen | Conc.: 1 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Cryogen name: ETHANE |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 22500 X / Nominal defocus max: 4000 nm / Nominal defocus min: 1000 nm / Cs: 2.7 mm / C2 aperture diameter: 100 µm |
Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
Image recording | Average exposure time: 7 sec. / Electron dose: 9.6 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of real images: 11181 |
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Processing
EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||||||||||||||||||
3D reconstruction | Resolution: 4.4 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 42484 / Symmetry type: POINT |