2KKF

Solution structure of MLL CXXC domain in complex with palindromic CPG DNA


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structure of the MLL CXXC domain-DNA complex and its functional role in MLL-AF9 leukemia.

Cierpicki, T.Risner, L.E.Grembecka, J.Lukasik, S.M.Popovic, R.Omonkowska, M.Shultis, D.D.Zeleznik-Le, N.J.Bushweller, J.H.

(2010) Nat Struct Mol Biol 17: 62-68

  • DOI: 10.1038/nsmb.1714
  • Primary Citation of Related Structures:  
    2KKF

  • PubMed Abstract: 
  • The gene MLL (encoding the protein mixed-lineage leukemia) is the target of chromosomal translocations that cause leukemias with poor prognosis. All leukemogenic MLL fusion proteins retain the CXXC domain, which binds to nonmethylated CpG DNA sites. ...

    The gene MLL (encoding the protein mixed-lineage leukemia) is the target of chromosomal translocations that cause leukemias with poor prognosis. All leukemogenic MLL fusion proteins retain the CXXC domain, which binds to nonmethylated CpG DNA sites. We present the solution structure of the MLL CXXC domain in complex with DNA, showing how the CXXC domain distinguishes nonmethylated from methylated CpG DNA. On the basis of the structure, we generated point mutations that disrupt DNA binding. Introduction of these mutations into the MLL-AF9 fusion protein resulted in increased DNA methylation of specific CpG nucleotides in Hoxa9, increased H3K9 methylation, decreased expression of Hoxa9-locus transcripts, loss of immortalization potential, and inability to induce leukemia in mice. These results establish that DNA binding by the CXXC domain and protection against DNA methylation is essential for MLL fusion leukemia. They also provide support for viewing this interaction as a potential target for therapeutic intervention.


    Organizational Affiliation

    Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA.



Macromolecules

Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Histone-lysine N-methyltransferase HRXA59Homo sapiensMutation(s): 0 
Gene Names: ALL1CXXC7HRXHTRXKMT2AMLLTRX1MLL1
EC: 2.1.1.43 (PDB Primary Data), 2.1.1.354 (UniProt)
Find proteins for Q03164 (Homo sapiens)
Explore Q03164 
Go to UniProtKB:  Q03164
NIH Common Fund Data Resources
PHAROS  Q03164
Protein Feature View
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  • Reference Sequence
  • Find similar nucleic acids by:  Sequence   |   Structure
  • Entity ID: 2
    MoleculeChainsLengthOrganismImage
    5'-D(*CP*CP*CP*TP*GP*CP*GP*CP*AP*GP*GP*G)-3'B, C12N/A
    Small Molecules
    Ligands 1 Unique
    IDChainsName / Formula / InChI Key2D Diagram3D Interactions
    ZN
    Query on ZN

    Download CCD File 
    A
    ZINC ION
    Zn
    PTFCDOFLOPIGGS-UHFFFAOYSA-N
     Ligand Interaction
    Experimental Data & Validation

    Experimental Data

    • Method: SOLUTION NMR
    • Conformers Calculated: 200 
    • Conformers Submitted: 10 
    • Selection Criteria: structures with the lowest energy 
    • OLDERADO: 2KKF Olderado

    Structure Validation

    View Full Validation Report



    Entry History 

    Deposition Data

    Revision History 

    • Version 1.0: 2009-12-08
      Type: Initial release
    • Version 1.1: 2011-07-13
      Changes: Version format compliance