3BDW

Human CD94/NKG2A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.236 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The Heterodimeric Assembly of the CD94-NKG2 Receptor Family and Implications for Human Leukocyte Antigen-E Recognition

Sullivan, L.C.Clements, C.S.Beddoe, T.Johnson, D.Hoare, H.L.Lin, J.Huyton, T.Hopkins, E.J.Reid, H.H.Wilce, M.C.J.Kabat, J.Borrego, F.Coligan, J.E.Rossjohn, J.Brooks, A.G.

(2007) Immunity 27: 900-911

  • DOI: 10.1016/j.immuni.2007.10.013
  • Primary Citation of Related Structures:  
    3BDW

  • PubMed Abstract: 
  • The CD94-NKG2 receptor family that regulates NK and T cells is unique among the lectin-like receptors encoded within the natural killer cell complex. The function of the CD94-NKG2 receptors is dictated by the pairing of the invariant CD94 polypeptide with specific NKG2 isoforms to form a family of functionally distinct heterodimeric receptors ...

    The CD94-NKG2 receptor family that regulates NK and T cells is unique among the lectin-like receptors encoded within the natural killer cell complex. The function of the CD94-NKG2 receptors is dictated by the pairing of the invariant CD94 polypeptide with specific NKG2 isoforms to form a family of functionally distinct heterodimeric receptors. However, the structural basis for this selective pairing and how they interact with their ligand, HLA-E, is unknown. We describe the 2.5 A resolution crystal structure of CD94-NKG2A in which the mode of dimerization contrasts with that of other homodimeric NK receptors. Despite structural homology between the CD94 and NKG2A subunits, the dimer interface is asymmetric, thereby providing a structural basis for the preferred heterodimeric assembly. Structure-based sequence comparisons of other CD94-NKG2 family members, combined with extensive mutagenesis studies on HLA-E and CD94-NKG2A, allows a model of the interaction between CD94-NKG2A and HLA-E to be established, in which the invariant CD94 chain plays a more dominant role in interacting with HLA-E in comparison to the variable NKG2 chain.


    Organizational Affiliation

    Department of Microbiology and Immunology, University of Melbourne, Parkville, Victoria 3010, Australia.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Natural killer cells antigen CD94A, C123Homo sapiensMutation(s): 0 
Gene Names: KLRD1CD94
UniProt & NIH Common Fund Data Resources
Find proteins for Q13241 (Homo sapiens)
Explore Q13241 
Go to UniProtKB:  Q13241
PHAROS:  Q13241
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
NKG2-A/NKG2-B type II integral membrane proteinB, D120Homo sapiensMutation(s): 0 
Gene Names: KLRC1NKG2A
UniProt & NIH Common Fund Data Resources
Find proteins for P26715 (Homo sapiens)
Explore P26715 
Go to UniProtKB:  P26715
PHAROS:  P26715
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.236 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 44.651α = 90
b = 34.73β = 89.72
c = 152.896γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
DENZOdata reduction
SCALEPACKdata scaling
SCALAdata scaling
SOLVEphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-01-01
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2017-10-25
    Changes: Refinement description