3KLA

Ca2+ release from the endoplasmic reticulum of NY-ESO-1 specific T cells is modulated by the affinity of T cell receptor and by the use of the CD8 co-receptor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.188 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Ca2+ Release from the Endoplasmic Reticulum of NY-ESO-1-Specific T Cells Is Modulated by the Affinity of TCR and by the Use of the CD8 Coreceptor.

Chen, J.L.Morgan, A.J.Stewart-Jones, G.Shepherd, D.Bossi, G.Wooldridge, L.Hutchinson, S.L.Sewell, A.K.Griffiths, G.M.van der Merwe, P.A.Jones, E.Y.Galione, A.Cerundolo, V.

(2010) J.Immunol. 184: 1829-1839

  • DOI: 10.4049/jimmunol.0902103

  • PubMed Abstract: 
  • Although several cancer immunotherapy strategies are based on the use of analog peptides and on the modulation of the TCR affinity of adoptively transferred T cells, it remains unclear whether tumor-specific T cell activation by strong and weak TCR s ...

    Although several cancer immunotherapy strategies are based on the use of analog peptides and on the modulation of the TCR affinity of adoptively transferred T cells, it remains unclear whether tumor-specific T cell activation by strong and weak TCR stimuli evoke different Ca(2+) signatures from the Ca(2+) intracellular stores and whether the amplitude of Ca(2+) release from the endoplasmic reticulum (ER) can be further modulated by coreceptor binding to peptide/MHC. In this study, we combined functional, structural, and kinetic measurements to correlate the intensity of Ca(2+) signals triggered by the stimulation of the 1G4 T cell clone specific to the tumor epitope NY-ESO-1(157-165). Two analogs of the NY-ESO-1(157-165) peptide, having similar affinity to HLA-A2 molecules, but a 6-fold difference in binding affinity for the 1G4 TCR, resulted in different Ca(2+) signals and T cell activation. 1G4 stimulation by the stronger stimulus emptied the ER of stored Ca(2+), even in the absence of CD8 binding, resulting in sustained Ca(2+) influx. In contrast, the weaker stimulus induced only partial emptying of stored Ca(2+), resulting in significantly diminished and oscillatory Ca(2+) signals, which were enhanced by CD8 binding. Our data define the range of TCR/peptide MHC affinities required to induce depletion of Ca(2+) from intracellular stores and provide insights into the ability of T cells to tailor the use of the CD8 coreceptor to enhance Ca(2+) release from the ER. This, in turn, modulates Ca(2+) influx from the extracellular environment, ultimately controlling T cell activation.


    Organizational Affiliation

    Dept of Infection, Immunity and Biochemistry, The Henry Wellcome Building, Cardiff University School of Medicine, Cardiff, CF14 4XN.,Sir William Dunn School of Pathology, University of Oxford, Oxford OX1 3RE, UK.,Dept of Pharmacology, University of Oxford, Mansfield Road, Oxford, OX1 3QT, UK.,Weatherall Institute of Molecular Medicine, OX3 9DS, Oxford.,Division of Structural Biology, Wellcome Trust Centre for Human Genetics, University of Oxford, Roosevelt Drive, Oxford OX3 7BN, UK.,Cambridge Institute for Medical Research, PO Box 139, Addenbrooke's Hospital, Hills Road, Cambridge CB2 0XY, UK.,Immunocore, Limited, 57c Milton Park, Abingdon, Oxon, OX14 4RX, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HLA class I histocompatibility antigen, A-2 alpha chain
A, D
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, E
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
NYESO-1 peptide analogue
C, F
9Homo sapiensMutation(s): 1 
Gene Names: CTAG1A, CTAG1B (CTAG, CTAG1, ESO1, LAGE2, LAGE2A, LAGE2B)
Find proteins for P78358 (Homo sapiens)
Go to Gene View: CTAG1A CTAG1B
Go to UniProtKB:  P78358
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.188 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 62.853α = 90.00
b = 93.754β = 90.02
c = 79.903γ = 90.00
Software Package:
Software NamePurpose
EPMRphasing
SCALEPACKdata scaling
REFMACrefinement
DENZOdata reduction
ADSCdata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-02-16
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance