3ARE

Ternary crystal structure of the mouse NKT TCR-CD1d-4'deoxy-alpha-galactosylceramide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.220 
  • R-Value Observed: 0.223 

wwPDB Validation   3D Report Full Report



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: 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 A ...

    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
MoleculeChainsSequence LengthOrganismDetailsImage
Antigen-presenting glycoprotein CD1d1A302Mus musculusMutation(s): 0 
Gene Names: Cd1d1Cd1.1
Find proteins for P11609 (Mus musculus)
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Go to UniProtKB:  P11609
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-2-microglobulinB99Mus musculusMutation(s): 0 
Gene Names: B2m
Find proteins for P01887 (Mus musculus)
Explore P01887 
Go to UniProtKB:  P01887
NIH Common Fund Data Resources
IMPC  MGI:88127
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
NKT Valpha14-Jalpha18,NKT Valpha14-Jalpha18C207Mus musculusHomo sapiens
This entity is chimeric
Mutation(s): 0 
Find proteins for P01848 (Homo sapiens)
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Go to UniProtKB:  P01848
NIH Common Fund Data Resources
PHAROS  P01848
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Vbeta8.2,Vbeta8.2D244Mus musculusHomo sapiens
This entity is chimeric
Mutation(s): 0 
Find proteins for P01850 (Homo sapiens)
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Go to UniProtKB:  P01850
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 5
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
E, F
2 N-Glycosylation Oligosaccharides Interaction
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
4GH
Query on 4GH

Download Ideal Coordinates CCD File 
A
N-{(2S,3R)-1-[(4-deoxy-alpha-D-xylo-hexopyranosyl)oxy]-3-hydroxyoctadecan-2-yl}hexacosanamide
C50 H99 N O7
SBJWEMJDCMAIOT-AHRAGLCISA-N
 Ligand Interaction
NAG
Query on NAG

Download Ideal Coordinates CCD File 
A
2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
PEG
Query on PEG

Download Ideal Coordinates CCD File 
A
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
4GHKd :  617   nM  PDBBind
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.220 
  • R-Value Observed: 0.223 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.584α = 90
b = 86.259β = 90
c = 236.099γ = 90
Software Package:
Software NamePurpose
Blu-Icedata collection
PHASERphasing
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • 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