4V1M

Architecture of the RNA polymerase II-Mediator core transcription initiation complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 6.60 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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This is version 2.0 of the entry. See complete history


Literature

Architecture of the RNA Polymerase II-Mediator Core Initiation Complex.

Plaschka, C.Lariviere, L.Wenzeck, L.Seizl, M.Hemann, M.Tegunov, D.Petrotchenko, E.V.Borchers, C.H.Baumeister, W.Herzog, F.Villa, E.Cramer, P.

(2015) Nature 518: 376

  • DOI: https://doi.org/10.1038/nature14229
  • Primary Citation of Related Structures:  
    4V1M, 4V1N, 4V1O

  • PubMed Abstract: 

    The conserved co-activator complex Mediator enables regulated transcription initiation by RNA polymerase (Pol) II. Here we reconstitute an active 15-subunit core Mediator (cMed) comprising all essential Mediator subunits from Saccharomyces cerevisiae. The cryo-electron microscopic structure of cMed bound to a core initiation complex was determined at 9.7 Å resolution. cMed binds Pol II around the Rpb4-Rpb7 stalk near the carboxy-terminal domain (CTD). The Mediator head module binds the Pol II dock and the TFIIB ribbon and stabilizes the initiation complex. The Mediator middle module extends to the Pol II foot with a 'plank' that may influence polymerase conformation. The Mediator subunit Med14 forms a 'beam' between the head and middle modules and connects to the tail module that is predicted to bind transcription activators located on upstream DNA. The Mediator 'arm' and 'hook' domains contribute to a 'cradle' that may position the CTD and TFIIH kinase to stimulate Pol II phosphorylation.


  • Organizational Affiliation

    Max Planck Institute for Biophysical Chemistry, Department of Molecular Biology, Am Fassberg 11, 37077 Göttingen, Germany.


Macromolecules

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-DIRECTED RNA POLYMERASE II SUBUNIT RPB11,733Saccharomyces cerevisiaeMutation(s): 0 
EC: 2.7.7.6
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-DIRECTED RNA POLYMERASE II SUBUNIT RPB21,224Saccharomyces cerevisiaeMutation(s): 0 
EC: 2.7.7.6
UniProt
Find proteins for P08518 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-DIRECTED RNA POLYMERASE II SUBUNIT RPB3318Saccharomyces cerevisiaeMutation(s): 0 
UniProt
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-DIRECTED RNA POLYMERASES I, II, AND III SUBUNIT RPABC 1D [auth E]215Saccharomyces cerevisiaeMutation(s): 0 
UniProt
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-DIRECTED RNA POLYMERASES I, II, AND III SUBUNIT RPABC 2E [auth F]155Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-DIRECTED RNA POLYMERASES I, II, AND III SUBUNIT RPABC 3F [auth H]146Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 7
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-DIRECTED RNA POLYMERASE II SUBUNIT RPB9G [auth I]122Saccharomyces cerevisiaeMutation(s): 0 
UniProt
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Entity ID: 8
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-DIRECTED RNA POLYMERASES I, II, AND III SUBUNIT RPABC 5H [auth J]70Saccharomyces cerevisiaeMutation(s): 0 
UniProt
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Entity ID: 9
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-DIRECTED RNA POLYMERASE II SUBUNIT RPB11I [auth K]120Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 10
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-DIRECTED RNA POLYMERASES I, II, AND III SUBUNIT RPABC 4J [auth L]70Saccharomyces cerevisiaeMutation(s): 0 
EC: 2.7.7.6
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Entity ID: 11
MoleculeChains LengthOrganismImage
5'-D(*AP*AP*GP*TP*AP*CP*TP*TP*GP*AP)-3'K [auth N]10synthetic construct
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Entity ID: 12
MoleculeChains LengthOrganismImage
5'-D(*CP*CP*AP*GP*GP*AP)-3'L [auth P]6synthetic construct
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Entity ID: 13
MoleculeChains LengthOrganismImage
5'-D(*TP*CP*AP*AP*GP*TP*AP*CP*TP*TP*TP*TP*TP*CP *CP*BRUP*GP*GP*TP*C)-3'M [auth T]20synthetic construct
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 6.60 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONRELION1.2

Structure Validation

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Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2015-02-04
    Type: Initial release
  • Version 1.1: 2015-02-18
    Changes: Database references
  • Version 1.2: 2015-02-25
    Changes: Database references
  • Version 1.3: 2015-09-16
    Changes: Other
  • Version 2.0: 2017-08-02
    Changes: Atomic model, Data collection, Derived calculations, Refinement description