4P2O

Crystal structure of the 2B4 TCR in complex with 2A/I-Ek


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.192 

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This is version 3.1 of the entry. See complete history


Literature

Deconstructing the Peptide-MHC Specificity of T Cell Recognition.

Birnbaum, M.E.Mendoza, J.L.Sethi, D.K.Dong, S.Glanville, J.Dobbins, J.Ozkan, E.Davis, M.M.Wucherpfennig, K.W.Garcia, K.C.

(2014) Cell 157: 1073-1087

  • DOI: https://doi.org/10.1016/j.cell.2014.03.047
  • Primary Citation of Related Structures:  
    4P2O, 4P2Q, 4P2R

  • PubMed Abstract: 

    In order to survey a universe of major histocompatibility complex (MHC)-presented peptide antigens whose numbers greatly exceed the diversity of the T cell repertoire, T cell receptors (TCRs) are thought to be cross-reactive. However, the nature and extent of TCR cross-reactivity has not been conclusively measured experimentally. We developed a system to identify MHC-presented peptide ligands by combining TCR selection of highly diverse yeast-displayed peptide-MHC libraries with deep sequencing. Although we identified hundreds of peptides reactive with each of five different mouse and human TCRs, the selected peptides possessed TCR recognition motifs that bore a close resemblance to their known antigens. This structural conservation of the TCR interaction surface allowed us to exploit deep-sequencing information to computationally identify activating microbial and self-ligands for human autoimmune TCRs. The mechanistic basis of TCR cross-reactivity described here enables effective surveillance of diverse self and foreign antigens without necessitating degenerate recognition of nonhomologous peptides.


  • Organizational Affiliation

    Departments of Molecular and Cellular Physiology and Structural Biology, Stanford University School of Medicine, Stanford, CA 94305, USA; Program in Immunology, Stanford University School of Medicine, Stanford, CA 94305, USA.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
H-2 class II histocompatibility antigen, E-K alpha chain204Mus musculusMutation(s): 0 
UniProt
Find proteins for P04224 (Mus musculus)
Explore P04224 
Go to UniProtKB:  P04224
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UniProt GroupP04224
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
MHC class II E-beta-k236Mus musculusMutation(s): 0 
Gene Names: H2-Eb1
UniProt & NIH Common Fund Data Resources
Find proteins for Q31163 (Mus musculus)
Explore Q31163 
Go to UniProtKB:  Q31163
IMPC:  MGI:95901
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UniProt GroupQ31163
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
2B4 T-cell receptor alpha chain220Mus musculusMutation(s): 0 
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
2B4 T-cell receptor beta chain255Mus musculusMutation(s): 0 
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  • Reference Sequence

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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
2A peptideE [auth P]22synthetic constructMutation(s): 0 
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  • Reference Sequence
Oligosaccharides

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Entity ID: 6
MoleculeChains Length2D Diagram Glycosylation3D Interactions
alpha-L-fucopyranose-(1-3)-[2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)][alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranoseF [auth E]4N-Glycosylation
Glycosylation Resources
GlyTouCan:  G63564LA
GlyCosmos:  G63564LA
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.192 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 239.936α = 90
b = 60.176β = 104.33
c = 78.359γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United States--

Revision History  (Full details and data files)

  • Version 1.0: 2014-05-21
    Type: Initial release
  • Version 1.1: 2014-06-11
    Changes: Database references
  • Version 1.2: 2015-01-14
    Changes: Database references
  • Version 1.3: 2015-02-25
    Changes: Derived calculations
  • Version 2.0: 2017-09-20
    Changes: Atomic model, Author supporting evidence, Derived calculations, Other, Source and taxonomy, Structure summary
  • Version 2.1: 2017-11-01
    Changes: Author supporting evidence
  • Version 2.2: 2019-12-25
    Changes: Author supporting evidence, Data collection
  • Version 3.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Derived calculations, Refinement description, Structure summary
  • Version 3.1: 2023-12-27
    Changes: Data collection, Database references, Derived calculations, Structure summary