3QRF

Structure of a domain-swapped FOXP3 dimer


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.248 

Starting Model: experimental
View more details

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structure of a Domain-Swapped FOXP3 Dimer on DNA and Its Function in Regulatory T Cells.

Bandukwala, H.S.Wu, Y.Feuerer, M.Chen, Y.Barboza, B.Ghosh, S.Stroud, J.C.Benoist, C.Mathis, D.Rao, A.Chen, L.

(2011) Immunity 34: 479-491

  • DOI: https://doi.org/10.1016/j.immuni.2011.02.017
  • Primary Citation of Related Structures:  
    3QRF

  • PubMed Abstract: 

    The transcription factor FOXP3 is essential for the suppressive function of regulatory T cells that are required for maintaining self-tolerance. We have solved the crystal structure of the FOXP3 forkhead domain as a ternary complex with the DNA-binding domain of the transcription factor NFAT1 and a DNA oligonucleotide from the interleukin-2 promoter. A striking feature of this structure is that FOXP3 forms a domain-swapped dimer that bridges two molecules of DNA. Structure-guided or autoimmune disease (IPEX)-associated mutations in the domain-swap interface diminished dimer formation by the FOXP3 forkhead domain without compromising FOXP3 DNA binding. These mutations also eliminated T cell-suppressive activity conferred by FOXP3, both in vitro and in a murine model of autoimmune diabetes in vivo. We conclude that FOXP3-mediated suppressor function requires dimerization through the forkhead domain and that mutations in the dimer interface can lead to the systemic autoimmunity observed in IPEX patients.


  • Organizational Affiliation

    Immune Disease Institute and Program in Cellular and Molecular Medicine, Children's Hospital, Boston, MA 02115, USA.


Macromolecules

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Nuclear factor of activated T-cells, cytoplasmic 2A [auth N],
F [auth M]
286Homo sapiensMutation(s): 0 
Gene Names: NFATC2NFAT1NFATP
UniProt & NIH Common Fund Data Resources
Find proteins for Q13469 (Homo sapiens)
Explore Q13469 
Go to UniProtKB:  Q13469
PHAROS:  Q13469
GTEx:  ENSG00000101096 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ13469
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Forkhead box protein P3B [auth F],
C [auth G],
G [auth H],
H [auth I]
82Homo sapiensMutation(s): 0 
Gene Names: FOXP3IPEXJM2
UniProt & NIH Common Fund Data Resources
Find proteins for Q9BZS1 (Homo sapiens)
Explore Q9BZS1 
Go to UniProtKB:  Q9BZS1
PHAROS:  Q9BZS1
GTEx:  ENSG00000049768 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9BZS1
Sequence Annotations
Expand
  • Reference Sequence

Find similar nucleic acids by:  Sequence   |   3D Structure  

Entity ID: 3
MoleculeChains LengthOrganismImage
human hARRE2 DNA (Plus Strand)D [auth C],
I [auth A]
21N/A
Sequence Annotations
Expand
  • Reference Sequence

Find similar nucleic acids by:  Sequence   |   3D Structure  

Entity ID: 4
MoleculeChains LengthOrganismImage
human hARRE2 DNA (Minus Strand)E [auth D],
J [auth B]
21N/A
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.248 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 83.667α = 90
b = 131.234β = 89.95
c = 68.665γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-04-20
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2018-01-24
    Changes: Structure summary
  • Version 1.3: 2023-09-13
    Changes: Data collection, Database references, Derived calculations, Refinement description