4X8P

Crystal structure of Ash2L SPRY domain in complex with RbBP5


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.220 
  • R-Value Observed: 0.222 

wwPDB Validation   3D Report Full Report


This is version 1.0 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:  
    4X8N, 4X8P

  • 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 referred to as WRAD) ...

    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; jean-francois.couture@uottawa.ca.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Set1/Ash2 histone methyltransferase complex subunit ASH2,Set1/Ash2 histone methyltransferase complex subunit ASH2A182Homo sapiensMutation(s): 0 
Gene Names: ASH2LASH2L1
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UBL3 (Homo sapiens)
Explore Q9UBL3 
Go to UniProtKB:  Q9UBL3
PHAROS:  Q9UBL3
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Retinoblastoma-binding protein 5B12Homo sapiensMutation(s): 0 
Gene Names: RBBP5RBQ3
UniProt & NIH Common Fund Data Resources
Find proteins for Q15291 (Homo sapiens)
Explore Q15291 
Go to UniProtKB:  Q15291
PHAROS:  Q15291
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download Ideal Coordinates CCD File 
C [auth B]GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.220 
  • R-Value Observed: 0.222 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.5α = 90
b = 59.1β = 90
c = 70.8γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
d*TREKdata reduction
d*TREKdata scaling
PHASERphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-01-28
    Type: Initial release