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

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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