1QSF

STRUCTURE OF A6-TCR BOUND TO HLA-A2 COMPLEXED WITH ALTERED HTLV-1 TAX PEPTIDE Y8A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.245 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Four A6-TCR/peptide/HLA-A2 structures that generate very different T cell signals are nearly identical.

Ding, Y.H.Baker, B.M.Garboczi, D.N.Biddison, W.E.Wiley, D.C.

(1999) Immunity 11: 45-56

  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The interactions of three singly substituted peptide variants of the HTLV-1 Tax peptide bound to HLA-A2 with the A6 T cell receptor have been studied using T cell assays, kinetic and thermodynamic measurements, and X-ray crystallography. The three pe ...

    The interactions of three singly substituted peptide variants of the HTLV-1 Tax peptide bound to HLA-A2 with the A6 T cell receptor have been studied using T cell assays, kinetic and thermodynamic measurements, and X-ray crystallography. The three peptide/MHC ligands include weak agonists and antagonists with different affinities for TCR. The three-dimensional structures of the three A6-TCR/peptide/HLA-A2 complexes are remarkably similar to each other and to the wild-type agonist complex, with minor adjustments at the interface to accommodate the peptide substitutions (P6A, V7R, and Y8A). The lack of correlation between structural changes and the type of T cell signals induced provides direct evidence that different signals are not generated by different ligand-induced conformational changes in the alphabeta TCR.


    Related Citations: 
    • Structure of the complex between human T-cell receptor, viral peptide and HLA-A2
      Garboczi, D.N.,Ghosh, P.,Utz, U.,Fan, Q.R.,Biddison, W.E.,Wiley, D.C.
      (1996) Nature 384: 134
    • Two human T cell receptors bind in a similar diagonal mode to the HLA-A2/Tax peptide complex using different TCR amino acids
      Ding, Y.H.,Smith, K.,Garboczi, D.N.,Utz, U.,Biddison, W.E.,Wiley, D.C.
      (1998) Immunity 8: 403


    Organizational Affiliation

    Department of Molecular and Cellular Biology, Harvard University, Cambridge, Massachusetts 02138, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MHC CLASS I HLA-A
A
274Homo sapiensMutation(s): 0 
Gene Names: HLA-A (HLAA)
Find proteins for P01892 (Homo sapiens)
Go to Gene View: HLA-A
Go to UniProtKB:  P01892
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
BETA-2 MICROGLOBULIN
B
100Homo sapiensMutation(s): 1 
Gene Names: B2M
Find proteins for P61769 (Homo sapiens)
Go to Gene View: B2M
Go to UniProtKB:  P61769
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
TAX PEPTIDE Y8A
C
9N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
HUMAN T-CELL RECEPTOR
D
200Homo sapiensMutation(s): 0 
Gene Names: TRAC (TCRA)
Find proteins for P01848 (Homo sapiens)
Go to UniProtKB:  P01848
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
HUMAN T-CELL RECEPTOR
E
243N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.245 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 224.665α = 90.00
b = 48.460β = 90.46
c = 93.739γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
CNSrefinement
CNSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-12-21
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance