Biological Assembly 1  

 3D View: Structure

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 13.39 kDa 
• Atom Count: 938 
• Modelled Residue Count: 114 
• Deposited Residue Count: 114 
• Unique protein chains: 1

1HBW

Solution nmr structure of the dimerization domain of the yeast transcriptional activator Gal4 (residues 50-106)

• DOI: 10.2210/pdb1HBW/pdb
• BMRB: 5180

• Classification: TRANSCRIPTIONAL ACTIVATOR
• Organism(s): Saccharomyces cerevisiae
• Mutation(s): Yes 


• Deposited: 2001-04-20 Released: 2001-05-10 
• Deposition Author(s): Hidalgo, P., Ansari, A.Z., Schmidt, P., Hare, B., Simkovic, N., Farrell, S., Shin, E.J., Ptashne, M., Wagner, G.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 300 
• Conformers Submitted: 17 
• Selection Criteria: LOWEST ENERGY AND MINIMAL NOE DERIVED DISTANCE RESTRAINTS VIOLATIONS 

Literature

Recruitment of the Transcriptional Machinery Through Gal11P: Structure and Interactions of the GAL4 Dimerization Domain

Hidalgo, P., Ansari, A.Z., Schmidt, P., Hare, B., Simkovich, N., Farrell, S., Shin, E.J., Ptashne, M., Wagner, G.

(2001) Genes Dev 15: 1007

• PubMed: 11316794 
• DOI: 10.1101/gad.873901
• Primary Citation of Related Structures:  
  1HBW


• PubMed Abstract: 
  

The GAL4 dimerization domain (GAL4-dd) is a powerful transcriptional activator when tethered to DNA in a cell bearing a mutant of the GAL11 protein, named GAL11P. GAL11P (like GAL11) is a component of the RNA-polymerase II holoenzyme. Nuclear magnetic resonance (NMR) studies of GAL4-dd revealed an elongated dimer structure with C(2) symmetry containing three helices that mediate dimerization via coiled-coil contacts. The two loops between the three coiled coils form mobile bulges causing a variation of twist angles between the helix pairs. Chemical shift perturbation analysis mapped the GAL11P-binding site to the C-terminal helix alpha3 and the loop between alpha1 and alpha2. One GAL11P monomer binds to one GAL4-dd dimer rendering the dimer asymmetric and implying an extreme negative cooperativity mechanism. Alanine-scanning mutagenesis of GAL4-dd showed that the NMR-derived GAL11P-binding face is crucial for the novel transcriptional activating function of the GAL4-dd on GAL11P interaction. The binding of GAL4 to GAL11P, although an artificial interaction, represents a unique structural motif for an activating region capable of binding to a single target to effect gene expression.

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Organizational Affiliation: 

Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts 02115, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
REGULATORY PROTEIN GAL4	A, B	57	Saccharomyces cerevisiae	Mutation(s): 2
UniProt
Find proteins for P04386 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c)) Explore P04386  Go to UniProtKB:  P04386

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 300 
• Conformers Submitted: 17 
• Selection Criteria: LOWEST ENERGY AND MINIMAL NOE DERIVED DISTANCE RESTRAINTS VIOLATIONS 
• OLDERADO: 1HBW Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2001-04-20 
• Released Date: 2001-05-10 
Deposition Author(s): Hidalgo, P., Ansari, A.Z., Schmidt, P., Hare, B., Simkovic, N., Farrell, S., Shin, E.J., Ptashne, M., Wagner, G.

Revision History  

• Version 1.0: 2001-05-10
  Type: Initial release
  
• Version 1.1: 2011-05-07
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 2.0: 2020-01-15
  Changes: Atomic model, Data collection, Other