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 

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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
  • 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 ...

    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

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Nuclear factor of activated T-cells, cytoplasmic 2F [auth M], A [auth N]286Homo sapiensMutation(s): 0 
Gene Names: NFATC2NFAT1NFATP
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Find proteins for Q13469 (Homo sapiens)
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Go to UniProtKB:  Q13469
PHAROS:  Q13469
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Forkhead box protein P3B [auth F], C [auth G], G [auth H], H [auth I]82Homo sapiensMutation(s): 0 
Gene Names: FOXP3IPEXJM2
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Find proteins for Q9BZS1 (Homo sapiens)
Explore Q9BZS1 
Go to UniProtKB:  Q9BZS1
PHAROS:  Q9BZS1
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Entity ID: 3
MoleculeChainsLengthOrganismImage
human hARRE2 DNA (Plus Strand)I [auth A], D [auth C]21N/A
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Entity ID: 4
MoleculeChainsLengthOrganismImage
human hARRE2 DNA (Minus Strand)J [auth B], E [auth D]21N/A
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  • Reference Sequence
Small Molecules
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

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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