1B6U

CRYSTAL STRUCTURE OF THE HUMAN KILLER CELL INHIBITORY RECEPTOR (KIR2DL3) SPECIFIC FOR HLA-CW3 RELATED ALLELES

• PDB DOI: https://doi.org/10.2210/pdb1B6U/pdb

• Classification: KILLER CELL INHIBITORY RECEPTOR
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1999-01-18 Released: 1999-01-27 
• Deposition Author(s): Maenaka, K., Juji, T., Stuart, D.I., Jones, E.Y.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.00 Å
• R-Value Free: 0.320 
• R-Value Work: 0.248 
• R-Value Observed: 0.248 

Literature

Crystal structure of the human p58 killer cell inhibitory receptor (KIR2DL3) specific for HLA-Cw3-related MHC class I.

Maenaka, K., Juji, T., Stuart, D.I., Jones, E.Y.

(1999) Structure 7: 391-398

• PubMed: 10196125 
• DOI: https://doi.org/10.1016/s0969-2126(99)80052-5
• Primary Citation of Related Structures:  
  1B6U


• PubMed Abstract: 
  

  T cells and natural killer (NK) cells perform complementary roles in the cellular immune system. T cells identify infected cells directly through recognition of antigenic peptides that are displayed at the target cell surface by the classical major histocompatibility complex (MHC) class I molecules. NK cells monitor the target cell surface for malfunction of this display system, lysing potentially infected cells that might otherwise evade recognition by the T cells. Human killer cell inhibitory receptors (KIRs) control this process by either inhibiting or activating the cytotoxic activity of NK cells via specific binding to MHC class I molecules on the target cell.

---

Organizational Affiliation: 

Laboratory of Molecular Biophysics, Rex Richards Building, South Parks Road, Oxford OX1 3QU, UK. [e-mail]

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 28.19 kDa 
• Atom Count: 1,540 
• Modelled Residue Count: 199 
• Deposited Residue Count: 257 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
P58 KILLER CELL INHIBITORY RECEPTOR	A	257	Homo sapiens	Mutation(s): 0  Gene Names: NKAT2
UniProt & NIH Common Fund Data Resources
Find proteins for P43628 (Homo sapiens) Explore P43628  Go to UniProtKB:  P43628
PHAROS:  P43628 GTEx:  ENSG00000243772

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.00 Å
• R-Value Free: 0.320 
• R-Value Work: 0.248 
• R-Value Observed: 0.248 
• Space Group: P 6₅ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 95.4	α = 90
b = 95.4	β = 90
c = 130.8	γ = 120

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
CNS	refinement
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1999-01-27 
Deposition Author(s): Maenaka, K., Juji, T., Stuart, D.I., Jones, E.Y.

Revision History  

• Version 1.0: 1999-01-27
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2018-06-13
  Changes: Data collection