3TVM

Structure of the mouse CD1d-SMC124-iNKT TCR complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.224 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Glycolipids that Elicit IFN-gama-Biased Responses from Natural Killer T Cells

Tyznik, A.J.Farber, E.Girardi, E.Birkholz, A.Li, Y.Chitale, S.So, R.Arora, P.Khurana, A.Wang, J.Porcelli, S.A.Zajonc, D.M.Kronenberg, M.Howell, A.R.

(2011) Chem.Biol. 18: 1620-1630

  • DOI: 10.1016/j.chembiol.2011.10.015

  • PubMed Abstract: 
  • Natural killer T (NKT) cells recognize glycolipids presented by CD1d. The first antigen described, α-galactosyl ceramide (αGalCer), is a potential anticancer agent whose activity depends upon IFN-γ secretion. We report two analogs of αGalCer based on ...

    Natural killer T (NKT) cells recognize glycolipids presented by CD1d. The first antigen described, α-galactosyl ceramide (αGalCer), is a potential anticancer agent whose activity depends upon IFN-γ secretion. We report two analogs of αGalCer based on a naturally occurring glycosphingolipid, plakoside A. These compounds induce enhanced IFN-γ that correlates with detergent-resistant binding to CD1d and an increased stability of the lipid-CD1d complexes on antigen-presenting cells. Structural analysis on one of the analogs indicates that it is more deeply bound inside the CD1d groove, suggesting tighter lipid-CD1d interactions. To our knowledge, this is the first example in which structural information provides an explanation for the increased lipid-CD1d stability, likely responsible for the Th1 bias. We provide insights into the mechanism of IFN-γ-inducing compounds, and because our compounds activate human NKT cells, they could have therapeutic utility.


    Organizational Affiliation

    Division of Developmental Immunology, La Jolla Institute for Allergy & Immunology, La Jolla, CA 92037, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Antigen-presenting glycoprotein CD1d1
A, E
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, F
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, G
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, H
241Homo sapiensMutation(s): 0 
Gene Names: TRBC2 (TCRBC2)
Find proteins for A0A5B9 (Homo sapiens)
Go to UniProtKB:  A0A5B9
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
07P
Query on 07P

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Download CCD File 
A, E
N-[(2S,3R)-10-[(1R,2R)-2-decylcyclopropyl]-1-(alpha-D-galactopyranosyloxy)-3-hydroxydecan-2-yl]hexacosanamide
SMC124
C55 H107 N O8
BCHXWZQXEKOXKQ-IYKQKVLOSA-N
 Ligand Interaction
CL
Query on CL

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Download CCD File 
D
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
GOL
Query on GOL

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E
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
FUC
Query on FUC

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Download CCD File 
A, E
ALPHA-L-FUCOSE
C6 H12 O5
SHZGCJCMOBCMKK-SXUWKVJYSA-N
 Ligand Interaction
NAG
Query on NAG

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.224 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 78.970α = 90.00
b = 150.570β = 96.35
c = 101.960γ = 90.00
Software Package:
Software NamePurpose
Blu-Icedata collection
MOSFLMdata reduction
MOLREPphasing
REFMACrefinement
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-02-01
    Type: Initial release