1HYR

CRYSTAL STRUCTURE OF HUMAN MICA IN COMPLEX WITH NATURAL KILLER CELL RECEPTOR NKG2D


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.227 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Complex structure of the activating immunoreceptor NKG2D and its MHC class I-like ligand MICA.

Li, P.Morris, D.L.Willcox, B.E.Steinle, A.Spies, T.Strong, R.K.

(2001) Nat Immunol 2: 443-451

  • DOI: https://doi.org/10.1038/87757
  • Primary Citation of Related Structures:  
    1HYR

  • PubMed Abstract: 

    The major histocompatibility complex (MHC) class I homolog, MICA, is a stress-inducible ligand for NKG2D, a C-type lectin-like activating immunoreceptor. The crystal structure of this ligand-receptor complex that we report here reveals an NKG2D homodimer bound to a MICA monomer in an interaction that is analogous to that seen in T cell receptor-MHC class I protein complexes. Similar surfaces on each NKG2D monomer interact with different surfaces on either the alpha1 or alpha2 domains of MICA. The binding interactions are large in area and highly complementary. The central section of the alpha2-domain helix, disordered in the structure of MICA alone, is ordered in the complex and forms part of the NKG2D interface. The extensive flexibility of the interdomain linker of MICA is shown by its altered conformation when crystallized alone or in complex with NKG2D.


  • Organizational Affiliation

    Division of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA 98109 USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
NKG2-D TYPE II INTEGRAL MEMBRANE PROTEINA [auth B],
B [auth A]
137Homo sapiensMutation(s): 0 
Gene Names: NKG2D
UniProt & NIH Common Fund Data Resources
Find proteins for P26718 (Homo sapiens)
Explore P26718 
Go to UniProtKB:  P26718
PHAROS:  P26718
GTEx:  ENSG00000213809 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP26718
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
MHC CLASS I CHAIN-RELATED PROTEIN A275Homo sapiensMutation(s): 0 
Gene Names: MICA-001
UniProt & NIH Common Fund Data Resources
Find proteins for Q29983 (Homo sapiens)
Explore Q29983 
Go to UniProtKB:  Q29983
PHAROS:  Q29983
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ29983
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.227 
  • Space Group: P 4 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 122.78α = 90
b = 122.78β = 90
c = 101.82γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
CNSrefinement
CNSphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-05-23
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance