The Mediator Med25 activator interaction domain: Structure and cooperative binding of VP16 subdomains

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: ENERGY 

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Structure and Vp16 Binding of the Mediator Med25 Activator Interaction Domain.

Vojnic, E.Mourao, A.Seizl, M.Simon, B.Wenzeck, L.Lariviere, L.Baumli, S.Baumgart, K.Meisterernst, M.Sattler, M.Cramer, P.

(2011) Nat Struct Mol Biol 18: 404

  • DOI: https://doi.org/10.1038/nsmb.1997
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Eukaryotic transcription is regulated by interactions between gene-specific activators and the coactivator complex Mediator. Here we report the NMR structure of the Mediator subunit Med25 (also called Arc92) activator interaction domain (ACID) and analyze the structural and functional interaction of ACID with the archetypical acidic transcription activator VP16. Unlike other known activator targets, ACID forms a seven-stranded β-barrel framed by three helices. The VP16 subdomains H1 and H2 bind to opposite faces of ACID and cooperate during promoter-dependent activated transcription in a in vitro system. The activator-binding ACID faces are functionally required and conserved among higher eukaryotes. Comparison with published activator structures reveals that the VP16 activation domain uses distinct interaction modes to adapt to unrelated target surfaces and folds that evolved for activator binding.

  • Organizational Affiliation

    Gene Center and Department of Biochemistry, Center for Integrated Protein Science Munich (CIPSM), Ludwig-Maximilians-Universität München, Munich, Germany.

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Entity ID: 1
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Find proteins for Q71SY5 (Homo sapiens)
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Go to UniProtKB:  Q71SY5
GTEx:  ENSG00000104973 
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: ENERGY 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-03-09
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance