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


This is version 1.0 of the entry. See complete history

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

  • 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 hydropho ...

    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

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Mediator of RNA polymerase II transcription subunit 15
A
81Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: GAL11 (ABE1, MED15, RAR3, SDS4, SPT13)
Find proteins for P19659 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P19659
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
General control protein GCN4
B
34Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: GCN4 (AAS3, ARG9)
Find proteins for P03069 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P03069
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

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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