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 

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:  

  • 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 reac ...

    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.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
J809.B5 TCR V alpha chain (Va2.8)
A
199N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
J809.B5 TCR V beta chain (Vb8.2)
B
239N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
H-2 class II histocompatibility antigen, A-B alpha chain
C
179Mus musculusMutation(s): 0 
Gene Names: H2-Aa
Find proteins for P14434 (Mus musculus)
Go to UniProtKB:  P14434
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
3K peptide and MHC IAb beta chain,H-2 class II histocompatibility antigen, A beta chain
D
218Mus musculusMutation(s): 0 
Gene Names: H2-Ab1 (H2-iabeta)
Find proteins for P14483 (Mus musculus)
Go to UniProtKB:  P14483
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.164 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 239.121α = 90.00
b = 73.514β = 90.58
c = 65.730γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data scaling
HKL-2000data reduction
PDB_EXTRACTdata extraction
HKLdata scaling
HKLdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



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
    Type: Database references