2NW2

Crystal structure of ELS4 TCR at 1.4A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.4 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.192 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

A T cell receptor flattens a bulged antigenic peptide presented by a major histocompatibility complex class I molecule

Tynan, F.E.Reid, H.H.Kjer-Nielsen, L.Miles, J.J.Wilce, M.C.Kostenko, L.Borg, N.A.Williamson, N.A.Beddoe, T.Purcell, A.W.Burrows, S.R.McCluskey, J.Rossjohn, J.

(2007) Nat.Immunol. 8: 268-276

  • DOI: 10.1038/ni1432
  • Primary Citation of Related Structures:  2NW3, 2NX5

  • PubMed Abstract: 
  • Plasticity of the T cell receptor (TCR) is a hallmark of major histocompatibility complex (MHC)-restricted T cell recognition. However, it is unclear whether interactions of TCR and peptide-MHC class I (pMHCI) always conform to this paradigm. Here we ...

    Plasticity of the T cell receptor (TCR) is a hallmark of major histocompatibility complex (MHC)-restricted T cell recognition. However, it is unclear whether interactions of TCR and peptide-MHC class I (pMHCI) always conform to this paradigm. Here we describe the structure of a TCR, ELS4, in its non-ligand-bound form and in complex with a prominent 'bulged' Epstein-Barr virus peptide bound to HLA-B(*)3501. This complex was atypical of previously characterized TCR-pMHCI interactions in that a rigid face of the TCR crumpled the bulged antigenic determinant. This peptide 'bulldozing' created a more featureless pMHCI determinant, allowing the TCR to maximize MHC class I contacts essential for MHC class I restriction of TCR recognition. Our findings represent a mechanism of antigen recognition whereby the plasticity of the T cell response is dictated mainly by adjustments in the MHC-bound peptide.


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ELS4 TCR alpha chain
A
200Homo sapiensGene Names: TRA@
Find proteins for Q6P4G7 (Homo sapiens)
Go to UniProtKB:  Q6P4G7
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
ELS4 TCR beta chain
B
243Homo sapiensGene Names: TRBC1
Find proteins for P01850 (Homo sapiens)
Go to UniProtKB:  P01850
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.4 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.192 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 46.564α = 90.00
b = 84.163β = 107.34
c = 59.270γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
REFMACrefinement
MOLREPphasing
MOSFLMdata reduction
PDB_EXTRACTdata extraction
CCP4data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-02-27
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance