1MI5

The crystal structure of LC13 TcR in complex with HLAB8-EBV peptide complex

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.226 

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This is version 1.2 of the entry. See complete history. 


Literature

A Structural Basis for the Selection of Dominant alphabeta T Cell Receptors in Antiviral Immunity

Kjer-Nielsen, L., Clements, C.S., Purcell, A.W., Brooks, A.G., Whisstock, J.C., Burrows, S.R., McCluskey, J., Rossjohn, J.

(2003) Immunity 18: 53-64

  • DOI: 10.1016/s1074-7613(02)00513-7
  • Primary Citation of Related Structures:  
    1MI5

  • PubMed Abstract: 

    • We have examined the basis for immunodominant or "public" TCR usage in an antiviral CTL response. Residues encoded by each of the highly selected genetic elements of an immunodominant clonotype recognizing Epstein-Barr virus were critical to the antigen specificity of the receptor ...

    We have examined the basis for immunodominant or "public" TCR usage in an antiviral CTL response. Residues encoded by each of the highly selected genetic elements of an immunodominant clonotype recognizing Epstein-Barr virus were critical to the antigen specificity of the receptor. Upon recognizing antigen, the immunodominant TCR undergoes extensive conformational changes in the complementarity determining regions (CDRs), including the disruption of the canonical structures of the germline-encoded CDR1alpha and CDR2alpha loops to produce an enhanced fit with the HLA-peptide complex. TCR ligation induces conformational changes in the TCRalpha constant domain thought to form part of the docking site for CD3epsilon. These findings indicate that TCR immunodominance is associated with structural properties conferring receptor specificity and suggest a novel structural link between TCR ligation and intracellular signaling.

    Organizational Affiliation: 

    Department of Microbiology & Immunology, University of Melbourne, Parkville, Victoria 3010, Australia.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
MHC heavy chainA277Homo sapiensMutation(s): 0 
Gene Names: HLA-B, HLAB
Find proteins for P01889 (Homo sapiens)
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PHAROS  P01889
GTEx  ENSG00000234745
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
beta 2 microglobulinB99Homo sapiensMutation(s): 0 
Gene Names: B2M, CDABP0092, HDCMA22P
Find proteins for P61769 (Homo sapiens)
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PHAROS  P61769
GTEx  ENSG00000166710
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Epstein Barr Virus peptideC9N/AMutation(s): 0 
Find proteins for Q3KST2 (Epstein-Barr virus (strain GD1))
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
TcR alpha chainD201Homo sapiensMutation(s): 0 
Gene Names: TRAC, TCRA
Find proteins for P01848 (Homo sapiens)
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PHAROS  P01848
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
TcR beta chainE241Homo sapiensMutation(s): 0 
Gene Names: TRBC1
Find proteins for P01850 (Homo sapiens)
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Go to UniProtKB:  P01850
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.226 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 56.49α = 90
b = 105.9β = 90
c = 144.5γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
CNSrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-02-04
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance