Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

 3D View: Structure | Electron Density

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 70.85 kDa 
• Atom Count: 5019 
• Modelled Residue Count: 606 
• Deposited Residue Count: 648 
• Unique protein chains: 2

3PSL

Fine-tuning the stimulation of MLL1 methyltransferase activity by a histone H3 based peptide mimetic

• DOI: 10.2210/pdb3PSL/pdb

• Classification: TRANSCRIPTION/TRANSCRIPTION INHIBITOR
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2010-12-01 Released: 2010-12-22 
• Deposition Author(s): Avdic, V., Zhang, P., Lanouette, S., Voronova, A., Skerjanc, I., Couture, J.-F.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Free: 0.205 
• R-Value Work: 0.155 
• R-Value Observed: 0.157 

Literature

Fine-tuning the stimulation of MLL1 methyltransferase activity by a histone H3-based peptide mimetic.

Avdic, V., Zhang, P., Lanouette, S., Voronova, A., Skerjanc, I., Couture, J.F.

(2011) FASEB J 25: 960-967

• PubMed: 21135039 
• DOI: 10.1096/fj.10-171959
• Primary Citation of Related Structures:  
  3PSL


• PubMed Abstract: 
  

The SET1 family of methyltransferases carries out the bulk of histone H3 Lys-4 methylation in vivo. One of the common features of this family is the regulation of their methyltransferase activity by a tripartite complex composed of WDR5, RbBP5, and Ash2L. To selectively probe the role of the SET1 family of methyltransferases, we have developed a library of histone H3 peptide mimetics and report herein the characterization of an Nα acetylated form of histone H3 peptide (NαH3). Binding and inhibition studies reveal that the addition of an acetyl moiety to the N terminus of histone H3 significantly enhances its binding to WDR5 and prevents the stimulation of MLL1 methyltransferase activity by the WDR5-RbBP5-Ash2L complex. The crystal structure of NαH3 in complex with WDR5 reveals that a high-affinity hydrophobic pocket accommodates the binding of the acetyl moiety. These results provide the structural basis to control WDR5-RbBP5-Ash2L-MLL1 activity and a tool to manipulate stem cell differentiation programs.

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Organizational Affiliation: 

University of Ottawa, Ottawa Institute of Systems Biology, 451 Smyth Rd., Roger Guindon Hall, Ottawa, ON K1H 8M5, Canada.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
WD repeat-containing protein 5	A, B	318	Homo sapiens	Mutation(s): 0  Gene Names: WDR5, BIG3
Find proteins for P61964 (Homo sapiens) Explore P61964  Go to UniProtKB:  P61964
NIH Common Fund Data Resources
PHAROS:  P61964 GTEx:  ENSG00000196363

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
N-alpha acetylated form of histone H3	C, D	6	N/A	Mutation(s): 0

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Free: 0.205 
• R-Value Work: 0.155 
• R-Value Observed: 0.157 
• Space Group: P 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 45.947	α = 98.79
b = 48.614	β = 90.95
c = 63.308	γ = 117.48

Software Package:

Software Name	Purpose
Blu-Ice	data collection
MOLREP	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2010-12-01 
• Released Date: 2010-12-22 
Deposition Author(s): Avdic, V., Zhang, P., Lanouette, S., Voronova, A., Skerjanc, I., Couture, J.-F.

Revision History  

• Version 1.0: 2010-12-22
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2011-08-24
  Changes: Database references