3ARD

Ternary crystal structure of the mouse NKT TCR-CD1d-3'deoxy-alpha-galactosylceramide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.01 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.217 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 2.1 of the entry. See complete history


Literature

A molecular basis for the exquisite CD1d-restricted antigen specificity and functional responses of natural killer T cells

Wun, K.S.Cameron, G.Patel, O.Pang, S.S.Pellicci, D.G.Sullivan, L.C.Keshipeddy, S.Young, M.H.Uldrich, A.P.Thakur, M.S.Richardson, S.K.Howell, A.R.Illarionov, P.A.Brooks, A.G.Besra, G.S.McCluskey, J.Gapin, L.Porcelli, S.A.Godfrey, D.I.Rossjohn, J.

(2011) Immunity 34: 327-339

  • DOI: https://doi.org/10.1016/j.immuni.2011.02.001
  • Primary Citation of Related Structures:  
    3ARB, 3ARD, 3ARE, 3ARF, 3ARG

  • PubMed Abstract: 

    Natural killer T (NKT) cells respond to a variety of CD1d-restricted antigens (Ags), although the basis for Ag discrimination by the NKT cell receptor (TCR) is unclear. Here we have described NKT TCR fine specificity against several closely related Ags, termed altered glycolipid ligands (AGLs), which differentially stimulate NKT cells. The structures of five ternary complexes all revealed similar docking. Acyl chain modifications did not affect the interaction, but reduced NKT cell proliferation, indicating an affect on Ag processing or presentation. Conversely, truncation of the phytosphingosine chain caused an induced fit mode of TCR binding that affected TCR affinity. Modifications in the glycosyl head group had a direct impact on the TCR interaction and associated cellular response, with ligand potency reflecting the t(1/2) life of the interaction. Accordingly, we have provided a molecular basis for understanding how modifications in AGLs can result in striking alterations in the cellular response of NKT cells.


  • Organizational Affiliation

    The Protein Crystallography Unit, ARC Centre of Excellence in Structural and Functional Microbial Genomics, Department of Biochemistry and Molecular Biology, School of Biomedical Sciences, Monash University, Clayton, Victoria 3800, Australia.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Antigen-presenting glycoprotein CD1d1302Mus musculusMutation(s): 0 
Gene Names: Cd1d1Cd1.1
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-microglobulin99Mus 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-Jalpha18,NKT Valpha14-Jalpha18207Mus musculusHomo sapiens
This entity is chimeric
Mutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P01848 (Homo sapiens)
Explore P01848 
Go to UniProtKB:  P01848
PHAROS:  P01848
Entity Groups  
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UniProt GroupP01848
Sequence Annotations
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  • Reference Sequence
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Vbeta8.2,Vbeta8.2244Mus musculusHomo sapiens
This entity is chimeric
Mutation(s): 0 
UniProt
Find proteins for P01850 (Homo sapiens)
Explore P01850 
Go to UniProtKB:  P01850
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP01850
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
E, F, G
2N-Glycosylation
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
3GH
Query on 3GH

Download Ideal Coordinates CCD File 
H [auth A]N-{(2S,3R)-1-[(3-deoxy-alpha-D-xylo-hexopyranosyl)oxy]-3-hydroxyoctadecan-2-yl}hexacosanamide
C50 H99 N O7
XFTWWKOPEFGPIP-AYIWZJAFSA-N
Binding Affinity Annotations 
IDSourceBinding Affinity
3GH PDBBind:  3ARD Kd: 175 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.01 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.217 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.991α = 90
b = 86.732β = 90
c = 235.198γ = 90
Software Package:
Software NamePurpose
Blu-Icedata collection
PHASERphasing
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-03-30
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2014-01-29
    Changes: Database references
  • Version 1.3: 2020-01-22
    Changes: Advisory, Database references, Derived calculations, Source and taxonomy, Structure summary
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary
  • Version 2.1: 2023-11-01
    Changes: Data collection, Database references, Refinement description, Structure summary