Experimental Data Snapshot

  • Resolution: 1.70 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.205 

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Structure of the inhibitory receptor for human natural killer cells resembles haematopoietic receptors.

Fan, Q.R.Mosyak, L.Winter, C.C.Wagtmann, N.Long, E.O.Wiley, D.C.

(1997) Nature 389: 96-100

  • DOI: https://doi.org/10.1038/38028
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Abnormal cells deficient in class I major histocompatibility complex (MHC) expression are lysed by a class of lymphocytes called natural killer (NK) cells. This lysis provides a defence against pathogens and tumour cells that downregulate MHC expression to avoid an MHC-restricted, T-cell immune response. Normal cells escape lysis because their MHC molecules are recognized by NK-cell inhibitory receptors, which inhibit lysis. Several such inhibitory receptor families have been described in humans and mice. In the human killer-cell inhibitory receptor family, individual p58 members are specific for a subset of class I human leukocyte antigen (HLA)-C molecules. The human p58 natural killer-cell inhibitory receptor clone 42 recognizes HLA-Cw4, -Cw2 and -Cw6, but not HLA-Cw3, -Cw2, -Cw7 or -Cw8, which are recognized by p58 killer-cell inhibitor receptor clone 43. We have determined the X-ray structure of the p58 NK-cell inhibitory receptor clone 42 at 1.7-A resolution. The structure has tandem immunoglobulin-like domains positioned at an acute, 60-degree angle. Loops on the outside of the elbow between the domains form a binding site projected away from the NK-cell surface. The topology of the domains and their arrangement relative to each other reveal a relationship to the haematopoietic receptor family, with implications for the signalling mechanism in NK cells.

  • Organizational Affiliation

    Department of Molecular and Cellular Biology, Howard Hughes Medical Institute, Harvard University, Cambridge, Massachusetts 02138, USA. fan@crystal.harvard.edu

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
P58-CL42 KIR201Homo sapiensMutation(s): 0 
Gene Names: KIR2DL1CD158ANKAT1
UniProt & NIH Common Fund Data Resources
Find proteins for P43626 (Homo sapiens)
Explore P43626 
Go to UniProtKB:  P43626
PHAROS:  P43626
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP43626
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.70 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.205 
  • Space Group: P 61
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 92.36α = 90
b = 92.36β = 90
c = 46.77γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1998-11-11
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance