3P4F

Structural and biochemical insights into MLL1 core complex assembly and regulation.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.194 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structural and biochemical insights into MLL1 core complex assembly.

Avdic, V.Zhang, P.Lanouette, S.Groulx, A.Tremblay, V.Brunzelle, J.Couture, J.-F.

(2011) Structure 19: 101-108

  • DOI: 10.1016/j.str.2010.09.022

  • PubMed Abstract: 
  • Histone H3 Lys-4 methylation is predominantly catalyzed by a family of methyltransferases whose enzymatic activity depends on their interaction with a three-subunit complex composed of WDR5, RbBP5, and Ash2L. Here, we report that a segment of 50 resi ...

    Histone H3 Lys-4 methylation is predominantly catalyzed by a family of methyltransferases whose enzymatic activity depends on their interaction with a three-subunit complex composed of WDR5, RbBP5, and Ash2L. Here, we report that a segment of 50 residues of RbBP5 bridges the Ash2L C-terminal domain to WDR5. The crystal structure of WDR5 in ternary complex with RbBP5 and MLL1 reveals that both proteins binds peptide-binding clefts located on opposite sides of WDR5's β-propeller domain. RbBP5 engages in several hydrogen bonds and van der Waals contacts within a V-shaped cleft formed by the junction of two blades on WDR5. Mutational analyses of both the WDR5 V-shaped cleft and RbBP5 residues reveal that the interactions between RbBP5 and WDR5 are important for the stimulation of MLL1 methyltransferase activity. Overall, this study provides the structural basis underlying the formation of the WDR5-RbBP5 subcomplex and further highlight the crucial role of WDR5 in scaffolding the MLL1 core complex.


    Organizational Affiliation

    Ottawa Institute of Systems Biology, Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, ON K1H 8M5, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
WD repeat-containing protein 5
A
317Homo sapiensMutation(s): 0 
Gene Names: WDR5 (BIG3)
Find proteins for P61964 (Homo sapiens)
Go to Gene View: WDR5
Go to UniProtKB:  P61964
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Retinoblastoma-binding protein 5
B
11Homo sapiensMutation(s): 1 
Gene Names: RBBP5 (RBQ3)
Find proteins for Q15291 (Homo sapiens)
Go to Gene View: RBBP5
Go to UniProtKB:  Q15291
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Histone-lysine N-methyltransferase MLL
C
10Homo sapiensMutation(s): 1 
Gene Names: KMT2A (ALL1, CXXC7, HRX, HTRX, MLL, MLL1, TRX1)
EC: 2.1.1.43
Find proteins for Q03164 (Homo sapiens)
Go to Gene View: KMT2A
Go to UniProtKB:  Q03164
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.194 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 53.850α = 90.00
b = 81.350β = 90.00
c = 81.780γ = 90.00
Software Package:
Software NamePurpose
BUSTERrefinement
d*TREKdata scaling
StructureStudiodata collection
PHASERphasing
d*TREKdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-12-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2014-10-08
    Type: Database references
  • Version 1.3: 2018-02-07
    Type: Experimental preparation