4X8N

Crystal structure of Ash2L SPRY domain in complex with phosphorylated RbBP5


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.213 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

A phosphorylation switch on RbBP5 regulates histone H3 Lys4 methylation.

Zhang, P.Chaturvedi, C.P.Tremblay, V.Cramet, M.Brunzelle, J.S.Skiniotis, G.Brand, M.Shilatifard, A.Couture, J.F.

(2015) Genes Dev. 29: 123-128

  • DOI: 10.1101/gad.254870.114
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The methyltransferase activity of the trithorax group (TrxG) protein MLL1 found within its COMPASS (complex associated with SET1)-like complex is allosterically regulated by a four-subunit complex composed of WDR5, RbBP5, Ash2L, and DPY30 (also refer ...

    The methyltransferase activity of the trithorax group (TrxG) protein MLL1 found within its COMPASS (complex associated with SET1)-like complex is allosterically regulated by a four-subunit complex composed of WDR5, RbBP5, Ash2L, and DPY30 (also referred to as WRAD). We report structural evidence showing that in WRAD, a concave surface of the Ash2L SPIa and ryanodine receptor (SPRY) domain binds to a cluster of acidic residues, referred to as the D/E box, in RbBP5. Mutational analysis shows that residues forming the Ash2L/RbBP5 interface are important for heterodimer formation, stimulation of MLL1 catalytic activity, and erythroid cell terminal differentiation. We also demonstrate that a phosphorylation switch on RbBP5 stimulates WRAD complex formation and significantly increases KMT2 (lysine [K] methyltransferase 2) enzyme methylation rates. Overall, our findings provide structural insights into the assembly of the WRAD complex and point to a novel regulatory mechanism controlling the activity of the KMT2/COMPASS family of lysine methyltransferases.


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Set1/Ash2 histone methyltransferase complex subunit ASH2
A
181Homo sapiensMutation(s): 0 
Gene Names: ASH2L (ASH2L1)
Find proteins for Q9UBL3 (Homo sapiens)
Go to Gene View: ASH2L
Go to UniProtKB:  Q9UBL3
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Retinoblastoma-binding protein 5
B
10Homo sapiensMutation(s): 0 
Gene Names: RBBP5 (RBQ3)
Find proteins for Q15291 (Homo sapiens)
Go to Gene View: RBBP5
Go to UniProtKB:  Q15291
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
B
L-PEPTIDE LINKINGC3 H8 N O6 PSER
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.213 
  • Space Group: P 2 21 21
Unit Cell:
Length (Å)Angle (°)
a = 38.279α = 90.00
b = 51.542β = 90.00
c = 110.201γ = 90.00
Software Package:
Software NamePurpose
d*TREKdata reduction
PHENIXphasing
PHENIXrefinement
d*TREKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Canadian Institutes of Health ResearchCanadaMOP-136816

Revision History 

  • Version 1.0: 2015-01-28
    Type: Initial release
  • Version 1.1: 2017-09-06
    Type: Author supporting evidence, Database references, Derived calculations, Source and taxonomy