4IRS

Structure of the mouse CD1d-PyrC-alpha-GalCer-iNKT TCR complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.190 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Enhanced TCR footprint by a novel glycolipid increases NKT-dependent tumor protection.

Aspeslagh, S.Nemcovic, M.Pauwels, N.Venken, K.Wang, J.Van Calenbergh, S.Zajonc, D.M.Elewaut, D.

(2013) J.Immunol. 191: 2916-2925

  • DOI: 10.4049/jimmunol.1203134
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • NKT cells, a unique type of regulatory T cells, respond to structurally diverse glycolipids presented by CD1d. Although it was previously thought that recognition of glycolipids such as α-galactosylceramide (α-GalCer) by the NKT cell TCR (NKTCR) obey ...

    NKT cells, a unique type of regulatory T cells, respond to structurally diverse glycolipids presented by CD1d. Although it was previously thought that recognition of glycolipids such as α-galactosylceramide (α-GalCer) by the NKT cell TCR (NKTCR) obeys a key-lock principle, it is now clear this interaction is much more flexible. In this article, we report the structure-function analysis of a series of novel 6''-OH analogs of α-GalCer with more potent antitumor characteristics. Surprisingly, one of the novel carbamate analogs, α-GalCer-6''-(pyridin-4-yl)carbamate, formed novel interactions with the NKTCR. This interaction was associated with an extremely high level of Th1 polarization and superior antitumor responses. These data highlight the in vivo relevance of adding aromatic moieties to the 6''-OH position of the sugar and additionally show that judiciously chosen linkers are a promising strategy to generate strong Th1-polarizing glycolipids through increased binding either to CD1d or to NKTCR.


    Organizational Affiliation

    Laboratory for Molecular Immunology and Inflammation, Department of Rheumatology, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Antigen-presenting glycoprotein CD1d1
A
285Mus musculusMutation(s): 0 
Gene Names: Cd1d1 (Cd1.1)
Find proteins for P11609 (Mus musculus)
Go to UniProtKB:  P11609
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Beta-2-microglobulin
B
99Mus musculusMutation(s): 0 
Gene Names: B2m
Find proteins for P01887 (Mus musculus)
Go to UniProtKB:  P01887
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Valpha14 (mouse variable domain, human constant domain)
C
209Homo sapiensMutation(s): 0 
Gene Names: TRAC (TCRA)
Find proteins for P01848 (Homo sapiens)
Go to UniProtKB:  P01848
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Vbeta8.2 (mouse variable domain, human constant domain)
D
241N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
1LA
Query on 1LA

Download SDF File 
Download CCD File 
A
N-[(2S,3S,4R)-3,4-dihydroxy-1-{[6-O-(pyridin-4-ylcarbamoyl)-alpha-D-galactopyranosyl]oxy}octadecan-2-yl]hexacosanamide
C56 H103 N3 O10
GONJMTFPPNECAU-VEDNRHISSA-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
FUL
Query on FUL

Download SDF File 
Download CCD File 
A
BETA-L-FUCOSE
6-DEOXY-BETA-L-GALACTOSE
C6 H12 O5
SHZGCJCMOBCMKK-KGJVWPDLSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.190 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 78.970α = 90.00
b = 191.400β = 90.00
c = 151.220γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
iMOSFLMdata reduction
SCALAdata scaling
Blu-Icedata collection
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-09-04
    Type: Initial release
  • Version 1.1: 2014-02-05
    Type: Database references
  • Version 1.2: 2017-11-15
    Type: Refinement description