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

  • 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: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Histone-lysine N-methyltransferase HRX
A
59Homo sapiensMutation(s): 0 
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
Entity ID: 2
MoleculeChainsLengthOrganism
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 SDF File 
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 or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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