4V1N

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

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 7.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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This is version 2.1 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: 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 ...

    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
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-DIRECTED RNA POLYMERASE II SUBUNIT RPB1A1,733Saccharomyces cerevisiaeMutation(s): 0 
EC: 2.7.7.6
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-DIRECTED RNA POLYMERASE II SUBUNIT RPB2B1,224Saccharomyces cerevisiaeMutation(s): 0 
EC: 2.7.7.6
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Entity ID: 3
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DNA-DIRECTED RNA POLYMERASE II SUBUNIT RPB3C318Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-DIRECTED RNA POLYMERASE II SUBUNIT RPB4D221Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-DIRECTED RNA POLYMERASES I, II, AND III SUBUNIT RPABC 1E215Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 6
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DNA-DIRECTED RNA POLYMERASES I, II, AND III SUBUNIT RPABC 2F155Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 7
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DNA-DIRECTED RNA POLYMERASE II SUBUNIT RPB7G171Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 8
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DNA-DIRECTED RNA POLYMERASES I, II, AND III SUBUNIT RPABC 3H146Saccharomyces cerevisiaeMutation(s): 0 
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DNA-DIRECTED RNA POLYMERASE II SUBUNIT RPB9I122Saccharomyces cerevisiaeMutation(s): 0 
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DNA-DIRECTED RNA POLYMERASES I, II, AND III SUBUNIT RPABC 5J70Saccharomyces cerevisiaeMutation(s): 0 
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DNA-DIRECTED RNA POLYMERASE II SUBUNIT RPB11K120Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 12
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DNA-DIRECTED RNA POLYMERASES I, II, AND III SUBUNIT RPABC 4L70Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 13
MoleculeChainsSequence LengthOrganismDetailsImage
TRANSCRIPTION INITIATION FACTOR IIBM345Saccharomyces cerevisiaeMutation(s): 0 
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TATA-BOX-BINDING PROTEINO181Saccharomyces cerevisiaeMutation(s): 0 
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TRANSCRIPTION INITIATION FACTOR IIF SUBUNIT ALPHAQ734Saccharomyces mikataeMutation(s): 0 
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TRANSCRIPTION INITIATION FACTOR IIF SUBUNIT BETAR331Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.6.4.12
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MoleculeChainsLengthOrganismImage
NONTEMPLATE DNAN50synthetic construct
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Entity ID: 16
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RNAP6synthetic construct
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TEMPLATE DNAS [auth T]58synthetic construct
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 7.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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View more in-depth experimental data
Entry History 

Deposition Data

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: 2017-08-30
    Changes: Advisory, Atomic model, Data collection, Derived calculations, Refinement description
  • Version 2.1: 2019-04-10
    Changes: Data collection, Database references