3QRF

Structure of a domain-swapped FOXP3 dimer


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.248 

wwPDB Validation 3D Report Full Report


This is version 1.2 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: 10.1016/j.immuni.2011.02.017

  • 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-bindi ...

    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: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Nuclear factor of activated T-cells, cytoplasmic 2
N, M
286Homo sapiensMutation(s): 0 
Gene Names: NFATC2 (NFAT1, NFATP)
Find proteins for Q13469 (Homo sapiens)
Go to Gene View: NFATC2
Go to UniProtKB:  Q13469
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Forkhead box protein P3
F, G, H, I
82Homo sapiensMutation(s): 0 
Gene Names: FOXP3 (IPEX)
Find proteins for Q9BZS1 (Homo sapiens)
Go to Gene View: FOXP3
Go to UniProtKB:  Q9BZS1
Entity ID: 3
MoleculeChainsLengthOrganism
human hARRE2 DNA (Plus Strand)C,A21N/A
Entity ID: 4
MoleculeChainsLengthOrganism
human hARRE2 DNA (Minus Strand)D,B21N/A
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download SDF File 
Download CCD File 
F, G, H, I
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 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 = 90.00
b = 131.234β = 89.95
c = 68.665γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
ADSCdata collection
DENZOdata reduction
CNSphasing
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-04-20
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2018-01-24
    Type: Structure summary