3RUG

Crystal structure of Valpha10-Vbeta8.1 NKT TCR in complex with CD1d-alphaglucosylceramide (C20:2)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.212 

Starting Models: experimental
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This is version 2.2 of the entry. See complete history


Literature

A semi-invariant V(alpha)10(+) T cell antigen receptor defines a population of natural killer T cells with distinct glycolipid antigen-recognition properties

Uldrich, A.P.Patel, O.Cameron, G.Pellicci, D.G.Day, E.B.Sullivan, L.C.Kyparissoudis, K.Kjer-Nielsen, L.Vivian, J.P.Cao, B.Brooks, A.G.Williams, S.J.Illarionov, P.Besra, G.S.Turner, S.J.Porcelli, S.A.McCluskey, J.Smyth, M.J.Rossjohn, J.Godfrey, D.I.

(2011) Nat Immunol 12: 616-623

  • DOI: https://doi.org/10.1038/ni.2051
  • Primary Citation of Related Structures:  
    3AXL, 3RUG

  • PubMed Abstract: 

    Type I natural killer T cells (NKT cells) are characterized by an invariant variable region 14-joining region 18 (V(α)14-J(α)18) T cell antigen receptor (TCR) α-chain and recognition of the glycolipid α-galactosylceramide (α-GalCer) restricted to the antigen-presenting molecule CD1d. Here we describe a population of α-GalCer-reactive NKT cells that expressed a canonical V(α)10-J(α)50 TCR α-chain, which showed a preference for α-glucosylceramide (α-GlcCer) and bacterial α-glucuronic acid-containing glycolipid antigens. Structurally, despite very limited TCRα sequence identity, the V(α)10 TCR-CD1d-α-GlcCer complex had a docking mode similar to that of type I TCR-CD1d-α-GalCer complexes, although differences at the antigen-binding interface accounted for the altered antigen specificity. Our findings provide new insight into the structural basis and evolution of glycolipid antigen recognition and have notable implications for the scope and immunological role of glycolipid-specific T cell responses.


  • Organizational Affiliation

    Department of Microbiology and Immunology, The University of Melbourne, Parkville, Victoria, Australia.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Antigen-presenting glycoprotein CD1d1
A, C
302Mus 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  
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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, D
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
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UniProt GroupP01887
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Valpha10(mouse variable domain, human constant domain)
E, G
204Mus musculusMutation(s): 0 
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  • Reference Sequence
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Vbeta8.1(mouse variable domain, human constant domain)
F, H
241Mus musculusMutation(s): 0 
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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: 2.20 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.212 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 81.14α = 90
b = 118.834β = 110.24
c = 108.125γ = 90
Software Package:
Software NamePurpose
Blu-Icedata collection
MOLREPphasing
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: 2011-08-03
    Type: Initial release
  • Version 1.1: 2020-01-29
    Changes: Data collection, Database references, Derived calculations, Source and taxonomy, Structure summary
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary
  • Version 2.1: 2023-11-01
    Changes: Data collection, Database references, Refinement description, Structure summary
  • Version 2.2: 2024-11-20
    Changes: Structure summary