1HKF

The three dimensional structure of NK cell receptor Nkp44, a triggering partner in natural cytotoxicity


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.240 
  • R-Value Observed: 0.240 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The Three-Dimensional Structure of the Human Nk Cell Receptor Nkp44, a Triggering Partner in Natural Cytotoxicity

Cantoni, C.Ponassi, M.Biassoni, R.Conte, R.Spallarossa, A.Moretta, A.Moretta, L.Bolognesi, M.Bordo, D.

(2003) Structure 11: 725

  • DOI: 10.1016/s0969-2126(03)00095-9
  • Primary Citation of Related Structures:  
    1HKF

  • PubMed Abstract: 
  • Natural killer (NK) cells direct cytotoxicity against tumor or virally infected cells. NK cell activation depends on a fine balance between inhibitory and activating receptors. NKp44 is a cytotoxicity activating receptor composed of one Ig-like extracellular domain, a transmembrane segment, and a cytoplasmic domain ...

    Natural killer (NK) cells direct cytotoxicity against tumor or virally infected cells. NK cell activation depends on a fine balance between inhibitory and activating receptors. NKp44 is a cytotoxicity activating receptor composed of one Ig-like extracellular domain, a transmembrane segment, and a cytoplasmic domain. The 2.2 A crystal structure shows that the NKp44 Ig domain forms a saddle-shaped dimer, where a charged surface groove protrudes from the core structure in each subunit. NKp44 Ig domain disulfide bridge topology defines a new Ig structural subfamily. The data presented are a first step toward understanding the molecular basis for ligand recognition by natural cytotoxicity receptors, whose key role in the immune system is established, but whose cellular ligands are still elusive.


    Organizational Affiliation

    Dipartimento di Medicina Sperimentale, Università di Genova, Via L.B. Alberti 1, 16132 Genova, Italy.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
NK CELL ACTIVATING RECEPTOR A122Homo sapiensMutation(s): 0 
Gene Names: NCR2LY95
Find proteins for O95944 (Homo sapiens)
Explore O95944 
Go to UniProtKB:  O95944
NIH Common Fund Data Resources
PHAROS:  O95944
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.240 
  • R-Value Observed: 0.240 
  • Space Group: P 62 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 60.437α = 90
b = 60.437β = 90
c = 197.253γ = 120
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-06-11
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance