6BNL

Crystal structure of TCR-MHC-like molecule


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.181 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Dual Modifications of alpha-Galactosylceramide Synergize to Promote Activation of Human Invariant Natural Killer T Cells and Stimulate Anti-tumor Immunity.

Chennamadhavuni, D.Saavedra-Avila, N.A.Carreno, L.J.Guberman-Pfeffer, M.J.Arora, P.Yongqing, T.Koay, H.F.Godfrey, D.I.Keshipeddy, S.Richardson, S.K.Sundararaj, S.Lo, J.H.Wen, X.Gascon, J.A.Yuan, W.Rossjohn, J.Le Nours, J.Porcelli, S.A.Howell, A.R.

(2018) Cell Chem Biol 25: 571

  • DOI: 10.1016/j.chembiol.2018.02.009
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Glycosylceramides that activate CD1d-restricted invariant natural killer T (iNKT) cells have potential therapeutic applications for augmenting immune responses against cancer and infections. Previous studies using mouse models identified sphinganine ...

    Glycosylceramides that activate CD1d-restricted invariant natural killer T (iNKT) cells have potential therapeutic applications for augmenting immune responses against cancer and infections. Previous studies using mouse models identified sphinganine variants of α-galactosylceramide as promising iNKT cell activators that stimulate cytokine responses with a strongly proinflammatory bias. However, the activities of sphinganine variants in mice have generally not translated well to studies of human iNKT cell responses. Here, we show that strongly proinflammatory and anti-tumor iNKT cell responses were achieved in mice by a variant of α-galactosylceramide that combines a sphinganine base with a hydrocinnamoyl ester on C6″ of the sugar. Importantly, the activities observed with this variant were largely preserved for human iNKT cell responses. Structural and in silico modeling studies provided a mechanistic basis for these findings and suggested basic principles for capturing useful properties of sphinganine analogs of synthetic iNKT cell activators in the design of immunotherapeutic agents.


    Organizational Affiliation

    Department of Chemistry, The University of Connecticut, Storrs, CT 06269-3060, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Antigen-presenting glycoprotein CD1d1
A, E
302Mus 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
NKT Valpha14 (MOUSE) - 2C12 TCR - Hybrid mouse variable and human constant domains
C, G
207N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
NKT Vbeta8.2 (MOUSE) - 2C12 TCR - hybrid mouse variable and human constant domains
D, H
242N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
QWV
Query on QWV

Download SDF File 
Download CCD File 
A, E
N-[(2S,3R)-3-hydroxy-1-{[6-O-(3-phenylpropanoyl)-alpha-D-galactopyranosyl]oxy}octadecan-2-yl]hexacosanamide
C59 H107 N O9
ROLREGVMOYCGJS-XRHAFTOMSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
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: 2.6 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.181 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 79.666α = 90.00
b = 150.318β = 96.12
c = 100.144γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
BUSTERrefinement
iMOSFLMdata reduction
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-04-04
    Type: Initial release
  • Version 1.1: 2018-04-11
    Type: Data collection, Database references
  • Version 1.2: 2018-05-30
    Type: Data collection, Database references