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


View more in-depth experimental data

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