1HKF

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.245 
  • R-Value Work: 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


  • 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 extra ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
NK CELL ACTIVATING RECEPTOR
A
122Homo sapiensMutation(s): 0 
Gene Names: NCR2 (LY95)
Find proteins for O95944 (Homo sapiens)
Go to Gene View: NCR2
Go to UniProtKB:  O95944
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.240 
  • Space Group: P 62 2 2
Unit Cell:
Length (Å)Angle (°)
a = 60.437α = 90.00
b = 60.437β = 90.00
c = 197.253γ = 120.00
Software Package:
Software NamePurpose
DENZOdata reduction
CNSrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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