3DXA

Crystal Structure of the DM1 TCR in complex with HLA-B*4405 and decamer EBV antigen

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.50 Å
  • R-Value Free: 0.330 
  • R-Value Work: 0.286 
  • R-Value Observed: 0.289 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history. 


Literature

Natural micropolymorphism in human leukocyte antigens provides a basis for genetic control of antigen recognition.

Archbold, J.K., Macdonald, W.A., Gras, S., Ely, L.K., Miles, J.J., Bell, M.J., Brennan, R.M., Beddoe, T., Wilce, M.C., Clements, C.S., Purcell, A.W., McCluskey, J., Burrows, S.R., Rossjohn, J.

(2009) J Exp Med 206: 209-219

  • DOI: 10.1084/jem.20082136
  • Primary Citation of Related Structures:  
    3DX6, 3DX7, 3DX8, 3DX9, 3DXA

  • PubMed Abstract: 

    • Human leukocyte antigen (HLA) gene polymorphism plays a critical role in protective immunity, disease susceptibility, autoimmunity, and drug hypersensitivity, yet the basis of how HLA polymorphism influences T cell receptor (TCR) recognition is unclear. We examined how a natural micropolymorphism in HLA-B44, an important and large HLA allelic family, affected antigen recognition ...

    Human leukocyte antigen (HLA) gene polymorphism plays a critical role in protective immunity, disease susceptibility, autoimmunity, and drug hypersensitivity, yet the basis of how HLA polymorphism influences T cell receptor (TCR) recognition is unclear. We examined how a natural micropolymorphism in HLA-B44, an important and large HLA allelic family, affected antigen recognition. T cell-mediated immunity to an Epstein-Barr virus determinant (EENLLDFVRF) is enhanced when HLA-B*4405 was the presenting allotype compared with HLA-B*4402 or HLA-B*4403, each of which differ by just one amino acid. The micropolymorphism in these HLA-B44 allotypes altered the mode of binding and dynamics of the bound viral epitope. The structure of the TCR-HLA-B*4405(EENLLDFVRF) complex revealed that peptide flexibility was a critical parameter in enabling preferential engagement with HLA-B*4405 in comparison to HLA-B*4402/03. Accordingly, major histocompatibility complex (MHC) polymorphism can alter the dynamics of the peptide-MHC landscape, resulting in fine-tuning of T cell responses between closely related allotypes.

    Organizational Affiliation: 

    The Protein Crystallography Unit, Department of Biochemistry and Molecular Biology, School of Biomedical Sciences, Monash University, Clayton, Victoria 3800, Australia.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HLA class I histocompatibility complex HLA-B*4402A, F, K276Homo sapiensMutation(s): 1 
Gene Names: HLA-B, HLAB
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Find proteins for P01889 (Homo sapiens)
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PHAROS:  P01889
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UniProt GroupP01889
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-2-microglobulinB, G, L99Homo sapiensMutation(s): 0 
Gene Names: B2M, CDABP0092, HDCMA22P
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
EBV decapeptide epitopeC, H, M10N/AMutation(s): 0 
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Find proteins for P03204 (Epstein-Barr virus (strain B95-8))
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UniProt GroupP03204
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
DM1 T cell receptor alpha chainD, I, N199Homo sapiensMutation(s): 0 
Gene Names: TRAC, TCRA
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Find proteins for P01848 (Homo sapiens)
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PHAROS:  P01848
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
DM1 T cell receptor beta chainE, J, O244Homo sapiensMutation(s): 0 
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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.50 Å
  • R-Value Free: 0.330 
  • R-Value Work: 0.286 
  • R-Value Observed: 0.289 
  • Space Group: P 65 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 121.954α = 90
b = 121.954β = 90
c = 695.914γ = 120
Software Package:
Software NamePurpose
XSCALEdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-01-27
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2021-10-20
    Changes: Database references