1LP9

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

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.219 
  • R-Value Observed: 0.221 

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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

  • DOI: 10.1016/s1074-7613(03)00269-3
  • Primary Citation of Related Structures:  
    1LP9

  • 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
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HLA class I histocompatibility antigen, A-2 alpha chainA, H275Homo sapiensMutation(s): 0 
Gene Names: HLA-A*0201, HLA-A, HLAA
Find proteins for P04439 (Homo sapiens)
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Go to UniProtKB:  P04439
NIH Common Fund Data Resources
PHAROS  P04439
GTEx  ENSG00000206503
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-2-microglobulinB, I100Homo sapiensMutation(s): 0 
Gene Names: B2M, CDABP0092, HDCMA22P
Find proteins for P61769 (Homo sapiens)
Explore P61769 
Go to UniProtKB:  P61769
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PHAROS  P61769
GTEx  ENSG00000166710
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
self-peptide P1049C, J9N/AMutation(s): 0 
Find proteins for Q9NPA0 (Homo sapiens)
Explore Q9NPA0 
Go to UniProtKB:  Q9NPA0
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PHAROS  Q9NPA0
GTEx  ENSG00000134153
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
T-cell Receptor alpha chainE, L194Mus musculusMutation(s): 0 
Gene Names: Tcra
Find proteins for P01849 (Mus musculus)
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Go to UniProtKB:  P01849
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
T-cell Receptor beta chainF, M238Mus musculusMutation(s): 0 
Find proteins for P04213 (Mus musculus)
Explore P04213 
Go to UniProtKB:  P04213
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.219 
  • R-Value Observed: 0.221 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 93.708α = 90
b = 84.469β = 92.13
c = 121.336γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
SCALEPACKdata scaling
AMoREphasing
REFMACrefinement
HKL-2000data reduction

Structure Validation

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Entry History 

Deposition Data

Revision History 

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