1LP9

Xenoreactive complex AHIII 12.2 TCR bound to p1049/HLA-A2.1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.219 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

A correlation between TCR Valpha docking on MHC and CD8 dependence: implications for T cell selection.

Buslepp, J.Wang, H.Biddison, W.E.Appella, E.Collins, E.J.

(2003) Immunity 19: 595-606


  • PubMed Abstract: 
  • T cell receptors (TCR) adopt a similar orientation when binding with major histocompatibility complex (MHC) molecules, yet the biological mechanism that generates this similar TCR orientation remains obscure. We show here the cocrystallographic struc ...

    T cell receptors (TCR) adopt a similar orientation when binding with major histocompatibility complex (MHC) molecules, yet the biological mechanism that generates this similar TCR orientation remains obscure. We show here the cocrystallographic structure of a mouse TCR bound to a human MHC molecule not seen by the TCR during thymic development. The orientation of this xenoreactive murine TCR atop human MHC deviates from the typical orientation more than any previously determined TCR/MHC structure. This unique orientation is solely due to the placement of the TCR Valpha domain on the MHC. In light of new information provided by this structure, we have reanalyzed the existing TCR/MHC cocrystal structures and discovered unique features of TCR Valpha domain position on class I MHC that correlate with CD8 dependence. Finally, we propose that the orientation seen in TCR recognition of MHC is a consequence of selection during T cell development.


    Organizational Affiliation

    Department of Biochemistry and Biophysics, University of North Carolina, Chapel Hill, NC 27599, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HLA class I histocompatibility antigen, A-2 alpha chain
A, H
275Homo 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, I
100Homo sapiensMutation(s): 0 
Gene Names: B2M
Find proteins for P61769 (Homo sapiens)
Go to Gene View: B2M
Go to UniProtKB:  P61769
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
self-peptide P1049
C, J
9Homo sapiensMutation(s): 0 
Gene Names: EMC7 (C11orf3, C15orf24)
Find proteins for Q9NPA0 (Homo sapiens)
Go to Gene View: EMC7
Go to UniProtKB:  Q9NPA0
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
T-cell Receptor alpha chain
E, L
194Mus musculusMutation(s): 0 
Gene Names: Tcra
Find proteins for P01849 (Mus musculus)
Go to UniProtKB:  P01849
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
T-cell Receptor beta chain
F, M
238Mus musculusMutation(s): 0 
Find proteins for P04213 (Mus musculus)
Go to UniProtKB:  P04213
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.219 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 93.708α = 90.00
b = 84.469β = 92.13
c = 121.336γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
SCALEPACKdata scaling
HKL-2000data reduction
AMoREphasing
HKL-2000data collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-11-11
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Advisory, Version format compliance