6MRA

Diversity in the type II Natural Killer T cell receptor repertoire and antigen specificity leads to differing CD1d docking strategies


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.183 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Distinct CD1d docking strategies exhibited by diverse Type II NKT cell receptors.

Almeida, C.F.Sundararaj, S.Le Nours, J.Praveena, T.Cao, B.Burugupalli, S.Smith, D.G.M.Patel, O.Brigl, M.Pellicci, D.G.Williams, S.J.Uldrich, A.P.Godfrey, D.I.Rossjohn, J.

(2019) Nat Commun 10: 5242-5242

  • DOI: 10.1038/s41467-019-12941-9
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Type I and type II natural killer T (NKT) cells are restricted to the lipid antigen-presenting molecule CD1d. While we have an understanding of the antigen reactivity and function of type I NKT cells, our knowledge of type II NKT cells in health and ...

    Type I and type II natural killer T (NKT) cells are restricted to the lipid antigen-presenting molecule CD1d. While we have an understanding of the antigen reactivity and function of type I NKT cells, our knowledge of type II NKT cells in health and disease remains unclear. Here we describe a population of type II NKT cells that recognise and respond to the microbial antigen, α-glucuronosyl-diacylglycerol (α-GlcADAG) presented by CD1d, but not the prototypical type I NKT cell agonist, α-galactosylceramide. Surprisingly, the crystal structure of a type II NKT TCR-CD1d-α-GlcADAG complex reveals a CD1d F'-pocket-docking mode that contrasts sharply with the previously determined A'-roof positioning of a sulfatide-reactive type II NKT TCR. Our data also suggest that diverse type II NKT TCRs directed against distinct microbial or mammalian lipid antigens adopt multiple recognition strategies on CD1d, thereby maximising the potential for type II NKT cells to detect different lipid antigens.


    Organizational Affiliation

    Institute of Infection and Immunity, Cardiff University School of Medicine, Heath Park, Cardiff, CF14 4XN, UK. Jamie.rossjohn@monash.edu.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TCR alpha chain
A
203Mus musculusMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
TCR beta-chain
B
245Mus musculusMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.183 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 49.447α = 90
b = 74.229β = 90
c = 115.578γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2019-09-18
    Type: Initial release
  • Version 1.1: 2020-01-22
    Changes: Database references