4P23

J809.B5 TCR bound to IAb/3K

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.164 
  • R-Value Observed: 0.167 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history. 


Literature

Effect of CDR3 Sequences and Distal V Gene Residues in Regulating TCR-MHC Contacts and Ligand Specificity.

Stadinski, B.D., Trenh, P., Duke, B., Huseby, P.G., Li, G., Stern, L.J., Huseby, E.S.

(2014) J Immunol 192: 6071-6082

  • DOI: 10.4049/jimmunol.1303209
  • Primary Citation of Related Structures:  
    4P23, 4P46, 4P5T

  • PubMed Abstract: 

    • The mature T cell repertoire has the ability to orchestrate immunity to a wide range of potential pathogen challenges. This ability stems from thymic development producing individual T cell clonotypes that express TCRs with unique patterns of Ag reactivi ...

    The mature T cell repertoire has the ability to orchestrate immunity to a wide range of potential pathogen challenges. This ability stems from thymic development producing individual T cell clonotypes that express TCRs with unique patterns of Ag reactivity. The Ag specificity of TCRs is created from the combinatorial pairing of one of a set of germline encoded TCR Vα and Vβ gene segments with randomly created CDR3 sequences. How the amalgamation of germline encoded and randomly created TCR sequences results in Ag receptors with unique patterns of ligand specificity is not fully understood. Using cellular, biophysical, and structural analyses, we show that CDR3α residues can modulate the geometry in which TCRs bind peptide-MHC (pMHC), governing whether and how germline encoded TCR Vα and Vβ residues interact with MHC. In addition, a CDR1α residue that is positioned distal to the TCR-pMHC binding interface is shown to contribute to the peptide specificity of T cells. These findings demonstrate that the specificity of individual T cell clonotypes arises not only from TCR residues that create direct contacts with the pMHC, but also from a collection of indirect effects that modulate how TCR residues are used to bind pMHC.

    Organizational Affiliation: 

    Department of Pathology, University of Massachusetts Medical School, Worcester, MA 01655; and Eric.Huseby@umassmed.edu.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
J809.B5 TCR V alpha chain (Va2.8) A199Mus musculusMutation(s): 0 
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
J809.B5 TCR V beta chain (Vb8.2) B239Mus musculusMutation(s): 0 
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
H-2 class II histocompatibility antigen, A-B alpha chain C179Mus musculusMutation(s): 0 
Gene Names: H2-Aa
Find proteins for P14434 (Mus musculus)
Explore P14434 
Go to UniProtKB:  P14434
Protein Feature View
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
3K peptide and MHC IAb beta chain,H-2 class II histocompatibility antigen, A beta chain D218Mus musculusMutation(s): 0 
Gene Names: H2-Ab1, H2-iabeta
Find proteins for P14483 (Mus musculus)
Explore P14483 
Go to UniProtKB:  P14483
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.164 
  • R-Value Observed: 0.167 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 239.121α = 90
b = 73.514β = 90.58
c = 65.73γ = 90
Software Package:
Software NamePurpose
HKL-2000data reduction
PDB_EXTRACTdata extraction
PHENIXrefinement
HKL-2000data scaling
HKLdata reduction
HKLdata scaling

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of HealthUnited States--

Revision History 

  • Version 1.0: 2014-05-28
    Type: Initial release
  • Version 1.1: 2014-06-25
    Changes: Database references