2K86

Solution Structure of FOXO3a Forkhead domain


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • 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

Biochemical and structural characterization of an intramolecular interaction in FOXO3a and its binding with p53.

Wang, F.Marshall, C.B.Yamamoto, K.Li, G.Y.Plevin, M.J.You, H.Mak, T.W.Ikura, M.

(2008) J.Mol.Biol. 384: 590-603

  • DOI: 10.1016/j.jmb.2008.09.025

  • PubMed Abstract: 
  • FOXO3a, a forkhead transcription factor and member of the forkhead box class O (FOXO) subfamily, has been shown to promote the translocation of p53 to the cytoplasm, thereby inducing the mitochondria-associated apoptotic pathway. However, the binding ...

    FOXO3a, a forkhead transcription factor and member of the forkhead box class O (FOXO) subfamily, has been shown to promote the translocation of p53 to the cytoplasm, thereby inducing the mitochondria-associated apoptotic pathway. However, the binding sites that mediate this interaction between FOXO3a and p53 have not been identified. Here, we show that two regions within FOXO3a, the forkhead (FH) DNA binding domain and a conserved C-terminal transactivation domain (CR3), interact with the DNA binding domain of p53, with affinities in the low millimolar range and low micromolar range, respectively. Our data further suggest that within the FOXO3a molecule, the FH and CR3 domains engage in an intramolecular interaction with low micromolar affinity. Moreover, we used NMR to determine the solution structure of the FH domain. This enabled us to map the binding site for the CR3, which overlaps with the DNA binding site. We demonstrate that an intrinsically disordered linker between the FH and CR3 domains is required for full p53 binding activity. We also show that p53 disrupts the intramolecular interaction between FH and CR3. These results provide evidence for interplay of the FH and CR3 domains in association with p53.


    Organizational Affiliation

    Division of Signaling Biology, Ontario Cancer Institute, Toronto, Ontario, Canada M5G 2M9.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Forkhead box protein O3
A
103Homo sapiensGene Names: FOXO3 (FKHRL1, FOXO3A)
Find proteins for O43524 (Homo sapiens)
Go to Gene View: FOXO3
Go to UniProtKB:  O43524
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 2K86 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-10-14
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance