3BDW

Human CD94/NKG2A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.234 

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

  • 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 ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Natural killer cells antigen CD94
A, C
123Homo sapiensMutation(s): 0 
Gene Names: KLRD1 (CD94)
Find proteins for Q13241 (Homo sapiens)
Go to Gene View: KLRD1
Go to UniProtKB:  Q13241
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
NKG2-A/NKG2-B type II integral membrane protein
B, D
120Homo sapiensMutation(s): 0 
Gene Names: KLRC1 (NKG2A)
Find proteins for P26715 (Homo sapiens)
Go to Gene View: KLRC1
Go to UniProtKB:  P26715
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.234 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 44.651α = 90.00
b = 34.730β = 89.72
c = 152.896γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
DENZOdata reduction
SCALAdata scaling
SOLVEphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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