3TZV

Crystal structure of an iNKT TCR in complex with CD1d-lysophosphatidylcholine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.06 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.236 
  • R-Value Observed: 0.239 

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Literature

Lysophospholipid presentation by CD1d and recognition by a human Natural Killer T-cell receptor.

Lopez-Sagaseta, J.Sibener, L.V.Kung, J.E.Gumperz, J.Adams, E.J.

(2012) EMBO J 31: 2047-2059

  • DOI: 10.1038/emboj.2012.54
  • Primary Citation of Related Structures:  
    3U0P, 3TYF, 3TZV

  • PubMed Abstract: 
  • Invariant Natural Killer T (iNKT) cells use highly restricted αβ T cell receptors (TCRs) to probe the repertoire of lipids presented by CD1d molecules. Here, we describe our studies of lysophosphatidylcholine (LPC) presentation by human CD1d and its ...

    Invariant Natural Killer T (iNKT) cells use highly restricted αβ T cell receptors (TCRs) to probe the repertoire of lipids presented by CD1d molecules. Here, we describe our studies of lysophosphatidylcholine (LPC) presentation by human CD1d and its recognition by a native, LPC-specific iNKT TCR. Human CD1d presenting LPC adopts an altered conformation from that of CD1d presenting glycolipid antigens, with a shifted α1 helix resulting in an open A' pocket. Binding of the iNKT TCR requires a 7-Å displacement of the LPC headgroup but stabilizes the CD1d-LPC complex in a closed conformation. The iNKT TCR CDR loop footprint on CD1d-LPC is anchored by the conserved positioning of the CDR3α loop, whereas the remaining CDR loops are shifted, due in part to amino-acid differences in the CDR3β and Jβ segment used by this iNKT TCR. These findings provide insight into how lysophospholipids are presented by human CD1d molecules and how this complex is recognized by some, but not all, human iNKT cells.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, IL, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Invariant Natural Killer T Cell Receptor chain AAG213Homo sapiensMutation(s): 0 
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Invariant Natural Killer T Cell Receptor chain BBH259Homo sapiensMutation(s): 0 
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Antigen-presenting glycoprotein CD1dC276Homo sapiensMutation(s): 3 
Gene Names: CD1D
Find proteins for P15813 (Homo sapiens)
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Go to UniProtKB:  P15813
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PHAROS  P15813
Protein Feature View
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-2-microglobulinD99Homo sapiensMutation(s): 0 
Gene Names: B2MCDABP0092HDCMA22P
Find proteins for P61769 (Homo sapiens)
Explore P61769 
Go to UniProtKB:  P61769
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PHAROS  P61769
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  • Reference Sequence
Oligosaccharides

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Entity ID: 5
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
alpha-L-fucopyranose-(1-6)-2-acetamido-2-deoxy-beta-D-glucopyranose
E
2 N-Glycosylation Oligosaccharides Interaction
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
LSC
Query on LSC

Download CCD File 
C
(4R,7R,18E)-4,7-dihydroxy-N,N,N-trimethyl-10-oxo-3,5,9-trioxa-4-phosphaheptacos-18-en-1-aminium 4-oxide
C26 H53 N O7 P
YAMUFBLWGFFICM-ZOGNMOHXSA-O
 Ligand Interaction
D12
Query on D12

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C
DODECANE
C12 H26
SNRUBQQJIBEYMU-UHFFFAOYSA-N
 Ligand Interaction
GOL
Query on GOL

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C
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
HEX
Query on HEX

Download CCD File 
C
HEXANE
C6 H14
VLKZOEOYAKHREP-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.06 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.236 
  • R-Value Observed: 0.239 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 66.591α = 90
b = 117.605β = 90
c = 190.656γ = 90
Software Package:
Software NamePurpose
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction
HKL-2000data collection
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-04-25
    Type: Initial release
  • Version 1.1: 2017-11-08
    Changes: Advisory, Refinement description
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Database references, Derived calculations, Structure summary