6BNL

Crystal structure of TCR-MHC-like molecule


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.183 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 2.1 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: https://doi.org/10.1016/j.chembiol.2018.02.009
  • Primary Citation of Related Structures:  
    6BNK, 6BNL

  • 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 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
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Antigen-presenting glycoprotein CD1d1
A, E
302Mus musculusMutation(s): 0 
Gene Names: Cd1d1mCG_3074
UniProt & NIH Common Fund Data Resources
Find proteins for P11609 (Mus musculus)
Explore P11609 
Go to UniProtKB:  P11609
IMPC:  MGI:107674
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP11609
Glycosylation
Glycosylation Sites: 3Go to GlyGen: P11609-1
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Beta-2-microglobulin
B, F
99Mus musculusMutation(s): 0 
Gene Names: B2m
UniProt & NIH Common Fund Data Resources
Find proteins for P01887 (Mus musculus)
Explore P01887 
Go to UniProtKB:  P01887
IMPC:  MGI:88127
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP01887
Sequence Annotations
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
NKT Valpha14 (MOUSE) - 2C12 TCR - Hybrid mouse variable and human constant domains
C, G
207Homo sapiensMutation(s): 0 
Gene Names: B2MHDCMA22P
Entity Groups  
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Sequence Annotations
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  • Reference Sequence
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
NKT Vbeta8.2 (MOUSE) - 2C12 TCR - hybrid mouse variable and human constant domains
D, H
242Mus musculusMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 5
MoleculeChains Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
I, J
2N-Glycosylation
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.183 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 79.666α = 90
b = 150.318β = 96.12
c = 100.144γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
iMOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-04-04
    Type: Initial release
  • Version 1.1: 2018-04-11
    Changes: Data collection, Database references
  • Version 1.2: 2018-05-30
    Changes: Data collection, Database references
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary
  • Version 2.1: 2023-10-04
    Changes: Data collection, Database references, Refinement description, Structure summary