3PSL

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


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 

Starting Model: experimental
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This is version 1.3 of the entry. See complete history


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

  • DOI: https://doi.org/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.


  • Organizational Affiliation

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


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
WD repeat-containing protein 5
A, B
318Homo sapiensMutation(s): 0 
Gene Names: WDR5BIG3
UniProt & NIH Common Fund Data Resources
Find proteins for P61964 (Homo sapiens)
Explore P61964 
Go to UniProtKB:  P61964
PHAROS:  P61964
GTEx:  ENSG00000196363 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP61964
Sequence Annotations
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  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
N-alpha acetylated form of histone H3
C, D
6N/AMutation(s): 0 
Sequence Annotations
Expand
  • Reference Sequence
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 = 45.947α = 98.79
b = 48.614β = 90.95
c = 63.308γ = 117.48
Software Package:
Software NamePurpose
Blu-Icedata collection
MOLREPphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • 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
  • Version 1.3: 2023-09-06
    Changes: Data collection, Database references, Derived calculations, Refinement description