2H7B

Solution structure of the eTAFH domain from the human leukemia-associated fusion protein AML1-ETO


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The acute myeloid leukemia fusion protein AML1-ETO targets E proteins via a paired amphipathic helix-like TBP-associated factor homology domain

Plevin, M.J.Zhang, J.Guo, C.Roeder, R.G.Ikura, M.

(2006) Proc.Natl.Acad.Sci.USA 103: 10242-10247

  • DOI: 10.1073/pnas.0603463103

  • PubMed Abstract: 
  • Up to 15% of acute myeloid leukemias (AMLs) are characterized by the abnormal expression of the eight-twenty-one (ETO) transcriptional corepressor within an AML1-ETO fusion protein. The t(8;21) chromosomal translocation serves not only to disrupt WT ...

    Up to 15% of acute myeloid leukemias (AMLs) are characterized by the abnormal expression of the eight-twenty-one (ETO) transcriptional corepressor within an AML1-ETO fusion protein. The t(8;21) chromosomal translocation serves not only to disrupt WT AML1 function but also to introduce ETO activity during hematopoiesis. AML1-ETO was recently shown to inhibit E protein transactivation by physically displacing WT coactivator proteins in an interaction mediated by ETO. Here, we present the 3D solution structure of the human ETO TAFH (eTAFH) domain implicated in AML1-ETO:E protein interactions and report an unexpected fold similarity to paired amphipathic helix domains from the transcriptional corepressor Sin3. We identify and characterize a conserved surface on eTAFH that is essential for ETO:E protein recognition and show that the mutation of key conserved residues at this site alleviates ETO-based silencing of E protein transactivation. Our results address uncharacterized aspects of the corepression mechanism of ETO and suggest that eTAFH may serve to recruit ETO (or AML1-ETO) to DNA-bound transcription factors. Together, these findings imply that a cofactor exchange mechanism, analogous to that described for E protein inhibition, may represent a common mode of action for ETO.


    Organizational Affiliation

    Division of Signaling Biology, Ontario Cancer Institute, University Health Network, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Core-binding factor, ML1-ETO
A
105Homo sapiensMutation(s): 1 
Gene Names: RUNX1T1 (AML1T1, CBFA2T1, CDR, ETO, MTG8, ZMYND2)
Find proteins for Q06455 (Homo sapiens)
Go to Gene View: RUNX1T1
Go to UniProtKB:  Q06455
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 
  • Olderado: 2H7B Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-07-11
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance