2LPB

Structure of the complex of the central activation domain of Gcn4 bound to the mediator co-activator domain 1 of Gal11/med15


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 13 
  • Conformers Submitted: 13 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report


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Literature

The acidic transcription activator Gcn4 binds the mediator subunit Gal11/Med15 using a simple protein interface forming a fuzzy complex.

Brzovic, P.S.Heikaus, C.C.Kisselev, L.Vernon, R.Herbig, E.Pacheco, D.Warfield, L.Littlefield, P.Baker, D.Klevit, R.E.Hahn, S.

(2011) Mol Cell 44: 942-953

  • DOI: 10.1016/j.molcel.2011.11.008
  • Primary Citation of Related Structures:  
    2LPB

  • PubMed Abstract: 
  • The structural basis for binding of the acidic transcription activator Gcn4 and one activator-binding domain of the Mediator subunit Gal11/Med15 was examined by NMR. Gal11 activator-binding domain 1 has a four-helix fold with a small shallow hydrophobic cleft at its center ...

    The structural basis for binding of the acidic transcription activator Gcn4 and one activator-binding domain of the Mediator subunit Gal11/Med15 was examined by NMR. Gal11 activator-binding domain 1 has a four-helix fold with a small shallow hydrophobic cleft at its center. In the bound complex, eight residues of Gcn4 adopt a helical conformation, allowing three Gcn4 aromatic/aliphatic residues to insert into the Gal11 cleft. The protein-protein interface is dynamic and surprisingly simple, involving only hydrophobic interactions. This allows Gcn4 to bind Gal11 in multiple conformations and orientations, an example of a "fuzzy" complex, where the Gcn4-Gal11 interface cannot be described by a single conformation. Gcn4 uses a similar mechanism to bind two other unrelated activator-binding domains. Functional studies in yeast show the importance of residues at the protein interface, define the minimal requirements for a functional activator, and suggest a mechanism by which activators bind to multiple unrelated targets.


    Organizational Affiliation

    Department of Biochemistry, University of Washington, Seattle, WA 98195, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Mediator of RNA polymerase II transcription subunit 15A81Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: ABE1GAL11MED15RAR3SDS4SPT13YOL051W
Find proteins for P19659 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P19659 
Go to UniProtKB:  P19659
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
General control protein GCN4B34Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: AAS3ARG9GCN4YEL009C
Find proteins for P03069 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P03069 
Go to UniProtKB:  P03069
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 13 
  • Conformers Submitted: 13 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 2LPB Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-02-22
    Type: Initial release