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CRYSTAL STRUCTURE OF HUMAN A6 TCR COMPLEXED WITH HLA-A2 BOUND TO ALTERED HTLV-1 TAX PEPTIDE P6A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.216 

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

  • DOI: 10.1016/s1074-7613(00)80080-1
  • Structures With Same Primary Citation

  • 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., Wiley, D.C.
      (1996) Nature 384: 134

    Organizational Affiliation

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



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HLA CLASS I HISTOCOMPATIBILITY ANTIGEN, A-2 ALPHA CHAINA274Homo sapiensMutation(s): 0 
Gene Names: HLA-AHLAA
Find proteins for P04439 (Homo sapiens)
Explore P04439 
Go to UniProtKB:  P04439
NIH Common Fund Data Resources
PHAROS  P04439
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  • Reference Sequence

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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
BETA-2 MICROGLOBULINB100Homo sapiensMutation(s): 0 
Gene Names: B2MCDABP0092HDCMA22P
Find proteins for P61769 (Homo sapiens)
Explore P61769 
Go to UniProtKB:  P61769
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PHAROS  P61769
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
TAX PEPTIDE P6AC9N/AMutation(s): 0 
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  • Reference Sequence

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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
T-CELL RECEPTOR, ALPHA CHAIND200Homo sapiensMutation(s): 0 
Gene Names: TRACTCRA
Find proteins for P01848 (Homo sapiens)
Explore P01848 
Go to UniProtKB:  P01848
NIH Common Fund Data Resources
PHAROS  P01848
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  • Reference Sequence

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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
T-CELL RECEPTOR, BETA CHAINE243Homo sapiensMutation(s): 0 
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.216 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 226.953α = 90
b = 48.757β = 90.79
c = 95.551γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
CNSrefinement
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-10-14
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance