4WO4

The molecular bases of Delta/Alpha beta T cell-mediated antigen recognition.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.194 

wwPDB Validation 3D Report Full Report


This is version 2.0 of the entry. See complete history

Literature

The molecular bases of delta / alpha beta T cell-mediated antigen recognition.

Pellicci, D.G.Uldrich, A.P.Le Nours, J.Ross, F.Chabrol, E.Eckle, S.B.de Boer, R.Lim, R.T.McPherson, K.Besra, G.Howell, A.R.Moretta, L.McCluskey, J.Heemskerk, M.H.Gras, S.Rossjohn, J.Godfrey, D.I.

(2014) J.Exp.Med. 211: 2599-2615

  • DOI: 10.1084/jem.20141764
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • αβ and γδ T cells are disparate T cell lineages that can respond to distinct antigens (Ags) via the use of the αβ and γδ T cell Ag receptors (TCRs), respectively. Here we characterize a population of human T cells, which we term δ/αβ T cells, express ...

    αβ and γδ T cells are disparate T cell lineages that can respond to distinct antigens (Ags) via the use of the αβ and γδ T cell Ag receptors (TCRs), respectively. Here we characterize a population of human T cells, which we term δ/αβ T cells, expressing TCRs comprised of a TCR-δ variable gene (Vδ1) fused to joining α and constant α domains, paired with an array of TCR-β chains. We demonstrate that these cells, which represent ∼50% of all Vδ1(+) human T cells, can recognize peptide- and lipid-based Ags presented by human leukocyte antigen (HLA) and CD1d, respectively. Similar to type I natural killer T (NKT) cells, CD1d-lipid Ag-reactive δ/αβ T cells recognized α-galactosylceramide (α-GalCer); however, their fine specificity for other lipid Ags presented by CD1d, such as α-glucosylceramide, was distinct from type I NKT cells. Thus, δ/αβTCRs contribute new patterns of Ag specificity to the human immune system. Furthermore, we provide the molecular bases of how δ/αβTCRs bind to their targets, with the Vδ1-encoded region providing a major contribution to δ/αβTCR binding. Our findings highlight how components from αβ and γδTCR gene loci can recombine to confer Ag specificity, thus expanding our understanding of T cell biology and TCR diversity.


    Organizational Affiliation

    Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity and Australian Research Council Centre of Excellence in Advanced Molecular Imaging, University of Melbourne, Parkville, Victoria 3010, Australia Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity and Australian Research Council Centre of Excellence in Advanced Molecular Imaging, University of Melbourne, Parkville, Victoria 3010, Australia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Antigen-presenting glycoprotein CD1d
A
274Homo sapiensMutation(s): 0 
Gene Names: CD1D
Find proteins for P15813 (Homo sapiens)
Go to Gene View: CD1D
Go to UniProtKB:  P15813
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Beta-2-microglobulin
B
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
TCR variable DELTA 1 CHAIN and TCR constant Alpha
C
207N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
TCR variable BETA 2 (TRVB20) chain and TCR constant BETA
D
245N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FUC
Query on FUC

Download SDF File 
Download CCD File 
A
ALPHA-L-FUCOSE
C6 H12 O5
SHZGCJCMOBCMKK-SXUWKVJYSA-N
 Ligand Interaction
JLS
Query on JLS

Download SDF File 
Download CCD File 
A
(15Z)-N-[(2S,3S,4R)-1-(alpha-D-galactopyranosyloxy)-3,4-dihydroxyoctadecan-2-yl]tetracos-15-enamide
PBS-44
C48 H93 N O9
QMLKBWVXCMTWOZ-WWHSRKRPSA-N
 Ligand Interaction
BMA
Query on BMA

Download SDF File 
Download CCD File 
A
BETA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-RWOPYEJCSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.194 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 78.930α = 90.00
b = 79.250β = 90.00
c = 189.160γ = 90.00
Software Package:
Software NamePurpose
BUSTERrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Health and Medical Research Council (Australia)Australia--

Revision History 

  • Version 1.0: 2014-11-26
    Type: Initial release
  • Version 1.1: 2014-12-17
    Type: Database references
  • Version 1.2: 2014-12-24
    Type: Database references
  • Version 2.0: 2017-09-13
    Type: Atomic model, Author supporting evidence, Data collection, Database references, Derived calculations, Other, Source and taxonomy, Structure summary